CN216953184U - Smoke exhaust ventilator - Google Patents

Abstract

A smoke exhaust ventilator relates to the field of smoke exhaust ventilators, and is used for solving the problem that the machining process of a through hole is difficult to meet the diameter of an actually required opening under the condition of ensuring the sound absorption effect required by theory. Comprises a box body, a fan and a sound insulation part. The box body is provided with an inlet and an outlet; the fan is arranged in the box body and used for sucking the oil smoke from the inlet and discharging the oil smoke from the outlet; the portion that gives sound insulation is fixed in the box, the portion that gives sound insulation has first surface and the second surface that deviates from mutually, first surface and second surface all with the box between the inner wall have the clearance, a plurality of first noise reduction holes have been seted up on the first surface, a plurality of second noise reduction holes have been seted up on the second surface, a plurality of first noise reduction holes and a plurality of second noise reduction hole one-to-one setting, and communicate each other, first noise reduction hole is parallel with the axis in second noise reduction hole, first noise reduction hole coincides with the orthographic projection part of the second noise reduction hole that corresponds on the plane of perpendicular to axis. The utility model is used for removing oil smoke.

Description

Cooking fume exhauster

Technical Field

The utility model relates to the field of range hoods, in particular to a range hood.

Background

The range hood has become the indispensable kitchen equipment of modern family, and range hood mainly includes box and fan. The fan is installed in the box, has air intake and air outlet on the box, and under the effect of fan, the oil smoke gets into from the air intake, discharges from the air outlet to this realizes discharging fume. But in the process of fan smoking, there is the friction between wind and the box inner wall, and the friction can produce stronger noise, and housewives and the kitchen operating personnel who work under this kind of noise for a long time can produce bad reaction such as headache, dysphoria, palpitation, cause serious influence to healthy.

In prior art, for the noise reduction, often can install the mesh board in the box, the resonance sound absorbing structure is constituteed with the inside cavity of box to the mesh board, and sound can take place to resonate in the inner space after the through-hole on the mesh board, and at the resonance in-process, sound can produce the friction with air and the part in the box to lead to partial acoustic energy to turn into heat energy, fall the noise with this realization.

Through theoretical research, the sound absorption capacity of the resonance sound absorption structure is related to the size of the through hole of the mesh plate, but when the diameter of the required through hole is small, the processing technology of the through hole is limited, and in actual opening, the actual diameter of the through hole may be larger than the diameter of the theoretically required through hole, so that the sound absorption effect is poor.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a range hood, which is used for solving the problem that the machining process of a through hole is difficult to meet the actually required hole diameter under the condition of ensuring the sound absorption effect required by theory.

In order to achieve the above purpose, the embodiment of the utility model adopts the following technical scheme:

a range hood comprises a box body, a fan and a sound insulation part. The box body is provided with an inlet and an outlet; the fan is arranged in the box body and used for sucking the oil smoke from the inlet and discharging the oil smoke from the outlet; the portion that gives sound insulation is fixed in the box, the portion that gives sound insulation has first surface and the second surface that deviates from mutually, first surface and second surface all with the box between the inner wall have the clearance, a plurality of first noise reduction holes have been seted up on the first surface, a plurality of second noise reduction holes have been seted up on the second surface, a plurality of first noise reduction holes and a plurality of second noise reduction hole one-to-one setting, and communicate each other, first noise reduction hole is parallel with the axis in second noise reduction hole, first noise reduction hole coincides with the orthographic projection part of the second noise reduction hole that corresponds on the plane of perpendicular to axis.

According to the range hood provided by the embodiment of the utility model, the fan sucks the oil smoke from the inlet and discharges the oil smoke from the outlet, so that the oil smoke is cleaned. Because first surface and second surface have the clearance apart from the inner wall of box, consequently, form the vibrations cavity between the sound-proof part can and the inner wall of box, the produced sound of fan can pass through first noise reduction hole and second noise reduction hole and get into in the vibrations cavity, and in the vibrations cavity, the sound resonates, turns into partial acoustic energy heat energy, realizes making an uproar.

And because the first noise reduction hole is superposed with and communicated with the orthographic projection part of the corresponding second noise reduction hole on the plane vertical to the axis, when sound passes through the first noise reduction hole or the second noise reduction hole, the sound can only pass through the superposed part, and under the condition that the sizes of the first noise reduction hole and the second noise reduction hole are fixed, the size of a channel which can actually allow the sound to pass through is smaller than that of the first noise reduction hole and the second noise reduction hole, the noise reduction effect is better, and because the diameters of the first noise reduction hole and the second noise reduction hole are larger than that of the channel which actually allows the sound to pass through, the processing technology is simpler when the first noise reduction hole and the second noise reduction hole are processed. And the machining process of the through hole is reduced under the condition of meeting the diameter of the through hole required by theory.

In some embodiments of the utility model, the acoustic isolation section includes a first acoustic panel and a second acoustic panel, the first face being on the first acoustic panel, the first acoustic panel having a third face thereon, the third face being disposed away from the first face; the second surface is located the second acoustic celotex board, has the fourth surface on the second acoustic celotex board, and the fourth surface deviates from the setting with the second surface mutually, and the third surface is laminated fixedly each other with the fourth surface.

In some embodiments of the present invention, the first noise reduction holes are through holes penetrating the third surface and having an equal diameter everywhere, and the second noise reduction holes are through holes penetrating the fourth surface and having an equal diameter everywhere.

In some embodiments of the utility model, the through-hole is a circular through-hole.

In some embodiments of the utility model, the aperture of the through-hole is 1-3 mm.

In some embodiments of the present invention, the range hood further includes a first connection rod fixed between the first surface and the inner wall of the box body, one end of the first connection rod is fixedly connected to the first surface, and the other end of the first connection rod is fixedly connected to the inner wall of the box body, and the first connection rod is used for fixing the soundproof portion on the inner wall of the box body.

In some embodiments of the present invention, the range hood further includes a second connecting rod, the second connecting rod is fixed between the sidewall of the sound insulation portion and the inner wall of the box body, one end of the second connecting rod is fixedly connected to the sidewall of the sound insulation portion, the other end of the second connecting rod is fixedly connected to the inner wall of the box body, and the second connecting rod is used for fixing the sound insulation portion to the inner wall of the box body.

In some embodiments of the present invention, the fan is a dual inlet fan, and the dual inlet fan is used for sucking wind from two wind inlets of the dual inlet fan.

In some embodiments of the utility model, the box body is internally provided with a first air inlet channel and a second air inlet channel, the first air inlet is positioned at one side where the first air inlet channel is positioned, the double-inlet fan comprises a first air inlet, a second air inlet and an air outlet, the first air inlet is communicated with the first air inlet channel, the first air inlet channel is communicated with the inlet, a sound insulation part is arranged in the first air inlet channel, and the sound insulation part is fixedly connected with the inner wall of the box body; the second air inlet is communicated with the second air inlet channel, the second air inlet is positioned at one side where the second air inlet channel is positioned, the second air inlet is communicated with the inlet, a sound insulation part is arranged in the second air inlet channel, the sound insulation part is fixedly connected with the inner wall of the box body, and the second air inlet is arranged opposite to the first air inlet; the air outlet is communicated with the outlet.

In some embodiments of the present invention, the box body further has a third air inlet channel, the third air inlet channel is communicated with the first air inlet channel and the second air inlet channel, the third air inlet channel is communicated with the inlet, a sound insulation part is installed in the third air inlet channel, and the sound insulation part is fixedly connected with the inner wall of the box body.

Drawings

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

fig. 2 is an external structural view of a range hood provided in the prior art;

fig. 3 is an external connection diagram of a mesh plate sound absorbing structure of a range hood provided in the prior art;

FIG. 4 is a first line graph of sound absorption coefficient versus natural frequency of a cavity within a cabinet provided by embodiments of the present invention;

FIG. 5 is a second line graph of sound absorption coefficient versus natural frequency of the cavity within the enclosure provided by embodiments of the present invention;

fig. 6 is a first external structural view of a soundproof portion according to an embodiment of the present invention;

fig. 7 is a second external structural view of the range hood according to the embodiment of the present invention;

FIG. 8 is a second external structural view of a soundproof portion provided in the embodiment of the utility model;

fig. 9 is a third external structural view of a soundproof portion according to an embodiment of the utility model;

fig. 10 is a fourth external structural view of a soundproof portion according to an embodiment of the present invention;

fig. 11 is a fifth external structural view of a soundproof portion according to an embodiment of the present invention;

FIG. 12 is a sixth external structural view of a soundproof portion provided in the embodiment of the utility model;

FIG. 13 is a partially enlarged view of a soundproof portion provided in an embodiment of the utility model;

fig. 14 is a first enlarged partial view of the range hood according to the embodiment of the present invention;

fig. 15 is a second enlarged partial view of the range hood according to the embodiment of the present invention;

fig. 16 is a first external structural view of a fixed sound insulating part of a range hood according to an embodiment of the present invention;

fig. 17 is a second external structural view of a fixed sound insulating part of a range hood according to an embodiment of the present invention;

fig. 18 is a second external structural view of the range hood according to the embodiment of the present invention;

fig. 19 is a third external structural view of the hood according to the embodiment of the present invention;

fig. 20 is a fourth external structural view of the range hood according to the embodiment of the present invention.

Reference numerals: 10-a smoke exhaust ventilator; 100-a box body; 110-an inlet; 120-an outlet; 130-a first air intake channel; 140-a second air inlet channel; 150-a third air intake channel; 200-a fan; 210-a first air inlet; 220-a second air inlet; 230-an air outlet; 300-mesh plate sound absorption structure; 310-mesh plates; 320-a fixed plate; 321-edge plates; 400-a sound insulation section; 410-a first acoustic panel; 411-a first surface; 412 — a first noise reduction hole; 413-a third surface; 420-a second acoustic panel; 421-a second surface; 422-second noise reduction hole; 423-a fourth surface; 500-first connecting rod; 600-a second connecting rod; 700-a carrier plate; 710-step face; 800-wing plate.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

When cooking, oil smoke is often generated, harmful objects are contained in the oil smoke, and the oil smoke can cause serious damage to human bodies after being inhaled for a long time.

Based on this, as shown in fig. 1, the present application provides a range hood 10, the range hood 10 includes a box 100 and a blower 200, the box 100 has an inlet 110 and an outlet 120; a blower 200 is installed in the cabinet 100, and the blower 200 is used to suck the soot from the inlet 110 and discharge the soot from the outlet 120. When cooking is performed, the fan 200 is started, oil smoke in the kitchen can enter from the inlet 110 and be discharged from the outlet 120 under the action of the fan 200, and air in the kitchen can be kept fresh through ventilation.

When the fan 200 works, air entering the box 100 rubs against the inner wall of the box 100 to generate strong noise, and housewives and kitchen operators working under the noise for a long time can generate adverse reactions such as headache, dysphoria, palpitation and the like to seriously affect the health of the body.

In the prior art, in order to reduce noise, as shown in fig. 2, a mesh plate sound absorption structure 300 is provided, as shown in fig. 3, the mesh plate sound absorption structure 300 is installed inside a box 100, the mesh plate sound absorption structure 300 includes a mesh plate 310 and a fixing plate 320, a plurality of through holes are opened on a side surface of the mesh plate 310, the fixing plate 320 is fixedly connected with an inner wall of the box 100, the mesh plate 310 is located on one side of the fixing plate 320, an edge plate 321 is connected to an opposite edge of the fixing plate 320, and the mesh plate 310 and the fixing plate 320 are fixed together by the edge plate 321. A gap is provided between the fixing plate 320 and the mesh plate 310.

When the fan 200 starts to work, noise is generated, sound can propagate around the fan 200 as a center, in the process of propagation, a part of sound can be in contact with the inner wall of the box body 100, another part of sound can be in contact with the mesh plate 310 and passes through the through holes on the mesh plate 310, when the sound passes through the through holes, a part of sound energy can be dissipated in the form of heat energy in the contact friction between the sound and the inner wall and the edge of the through holes, and another part of sound enters the gap and the inner cavity of the box body 100 through the through holes, and is continuously compressed and refracted in the inner cavity of the box body 100, when the frequency of the sound is close to the natural frequency of the inner cavity of the box body 100, resonance can occur, in the resonance, the sound can vibrate, and rub against air in the inner cavity of the box body 100, and a part of sound energy is converted into heat energy through friction and is slowly dissipated. Thereby achieving noise reduction.

Based on theoretical research, the sound absorption capability of the mesh plate sound absorption structure 300 is related to the sound absorption coefficient, and the larger the sound absorption coefficient is, the stronger the sound absorption capability is, and the smaller the sound absorption coefficient is, the weaker the sound absorption capability is.

The sound absorption coefficient is related to the fixed frequency of the inner cavity of the box body 100, and through experimental research, as shown in fig. 4, a linear relation between the sound absorption coefficient and the natural frequency of the inner cavity of the box body 100 is obtained, and as can be known from the figure, when the natural frequency of the inner cavity of the box body 100 is about 1000 hz, the sound absorption coefficient is larger; when the natural frequency of the inner cavity of the box body 100 is about 2000 Hz, the sound absorption coefficient is smaller; when the natural frequency of the inner cavity of the case 100 is around 6000 hz, the sound absorption coefficient is small.

According to theoretical research, under the condition that the natural frequency of the inner cavity of the box body 100 is constant, the sound absorption coefficient is also related to the diameter of the through hole, when the diameter of the through hole is between 0.15 and 0.5 mm, the sound absorption coefficient is larger and is larger than 0.6, and as shown in fig. 5, the relation between the diameter of the through hole and the sound absorption coefficient is shown when the diameter of the through hole is between 0.15 and 0.5. As can be seen from the graph, the sound absorption coefficient is highest when the diameter of the through-hole is 0.163 mm, and is lower when the diameter of the through-hole is 0.4 mm.

However, the diameter of the through hole is usually between 1 and 3 mm when the through hole is actually processed, and thus the sound absorption effect needs to be improved.

In order to solve the above problem, as shown in fig. 6, the range hood 10 provided by the present application includes a sound insulation portion 400, as shown in fig. 7, the sound insulation portion 400 is fixed in the box 100, the sound insulation portion 400 has a first surface 411 and a second surface 421 which are away from each other, the first surface 411 has a gap with an inner wall of the box 100 which is opposite to the first surface, and the second surface 421 has a gap with an inner wall of the box 100 which is opposite to the second surface, as shown in fig. 8 and 9, the first surface 411 is provided with a plurality of first noise reduction holes 412, the second surface 421 is provided with a plurality of second noise reduction holes 422, the plurality of first noise reduction holes 412 and the plurality of second noise reduction holes 422 are arranged in a one-to-one correspondence and are communicated with each other, axes of the first noise reduction holes 412 and the second noise reduction holes 422 are parallel, and orthographic projection portions of the first noise reduction holes 412 and the corresponding second noise reduction holes 422 on a plane perpendicular to the axes coincide with each other.

Because the first surface 411 has a gap with the inner wall of the opposite box 100, and the second surface 421 has a gap with the inner wall of the opposite box 100, a vibration cavity is formed between the sound insulation part 400 and the inner wall of the box 100, sound generated by the fan 200 enters the vibration cavity through the first noise reduction hole 412 and the second noise reduction hole 422, and the sound resonates in the vibration cavity to convert part of sound energy into heat energy, thereby reducing noise.

Since the first noise reduction holes 412 and the corresponding second noise reduction holes 422 overlap and communicate with each other in the orthographic projection of the first noise reduction holes 412 and the second noise reduction holes 422 on the plane perpendicular to the axis, when sound passes through the first noise reduction holes 412 or the second noise reduction holes 422, sound can only pass through the overlapped portions, and in the case where the first noise reduction holes 412 and the second noise reduction holes 422 have a fixed size, the size of the passage through which sound can actually pass is smaller than the size of the passage through which sound can actually pass through the first noise reduction holes 412 and the second noise reduction holes 422, so that the noise reduction effect is improved. And the machining process of the through hole is reduced under the condition of meeting the diameter of the through hole required by theory.

For example, when the diameter of the theoretically required through hole is 0.5 mm, if the conventional processing technology is used to directly punch the hole on one side, the hole is difficult to be punched, but with the method provided by the present application, the diameter of the first noise reduction hole 412 is only set to 1 mm, the diameter of the second noise reduction hole 422 is set to 1 mm, and the overlapping portion of the first noise reduction hole 412 and the second noise reduction hole 422 is configured to be 0.5 mm, so that the theoretically required hole diameter can be achieved, and the hole punching difficulty is greatly reduced.

The number of the first noise reduction holes 412 may be nine, ten, twenty or more, and the specific number may be designed according to the area size of the first baffle plate and the size of the opening of the first noise reduction holes 412. In addition, the first noise reduction holes 412 may be regularly arranged on the first surface 411, for example, in a square, circular, or the like in a horizontal, vertical arrangement. The first noise reduction holes 412 may also be irregularly arranged on the first surface 411, for example, in an unequal distance between every two first noise reduction holes 412.

The number of the second noise reduction holes 422 may be nine, ten, twenty or more, and the specific number may be designed according to the area size of the second soundproof plate 420 and the size of the opening of the second noise reduction holes 422. In addition, the second noise reduction holes 422 may be regularly arranged on the second surface 421, for example, arranged in a square, a circle, or the like in a horizontal and vertical direction, and the second noise reduction holes 422 may also be irregularly arranged on the second surface 421, for example, arranged in an unequal distance between every two second noise reduction holes 422.

On this basis, as shown in fig. 10, the sound insulation part 400 may be a square plate, the first surface 411 and the second surface 421 are two surfaces of the square plate opposite to each other, a plurality of first noise reduction holes 412 are formed in the first surface 411 by using a hole forming tool, a plurality of second noise reduction holes are formed in the second surface 421 by using a hole forming tool, and the first noise reduction holes 412 and the second noise reduction holes are arranged in a one-to-one correspondence manner, so that the sound insulation part 400 is formed. The sound insulation part 400 formed in such a way is integrated and not easy to damage, and only a hole forming process is needed during production, so that the steps are simple.

Alternatively, as shown in fig. 11, the sound insulation part 400 may include a first sound insulation plate 410 and a second sound insulation plate 420, the first sound insulation plate 410 may have a third surface 413, and the third surface 413 may be disposed opposite to the first surface 411; second surface 421 is located second acoustic celotex board 420, has fourth surface 423 on second acoustic celotex board 420, and fourth surface 423 sets up with second surface 421 back to back, and third surface 413 is laminated fixedly each other with fourth surface 423.

The soundproof portion 400 is divided into two panels, i.e., a first soundproof panel 410 and a second soundproof panel 420, and the first soundproof panel 410 is provided with a plurality of first noise reduction holes 412, and the second soundproof panel 420 is provided with a plurality of second noise reduction holes 422, respectively, and then the third surface 413 of the first soundproof panel 410 and the fourth surface 423 of the second soundproof panel 420 are bonded and fixed to each other, thereby forming the soundproof portion 400. The soundproof portion 400 is formed by splicing two panels, and when the hole is formed, only the hole forming process is performed on one side (the first surface 411) of the first soundproof panel 410, and the first soundproof panel 410 does not need to be turned over; only one side (the second surface 421) of the second soundproof plate 420 is required to be subjected to the hole forming process, and the second soundproof plate 420 does not need to be turned over, so that the hole forming process is simple.

The third surface 413 and the fourth surface 423 may be fixed by using a glue body in an adhesive manner, for example, the glue body may be a double-sided adhesive tape or a structural adhesive, the structural adhesive has high strength, and has good performances of peeling resistance, impact resistance and the like, and the construction process is also simple; or may be fixed by screw fastening. The present application is not specifically limited herein.

For example, when the third surface 413 and the fourth surface 423 are fixed by adhesive bonding, specifically, a glue is applied to the fourth surface 423, and then the third surface 413 is bonded to the glue and pressed with force to bond and fix the two firmly; or, a colloid is coated on the third surface 413, then the fourth surface 423 is attached to the colloid, and the fourth surface 423 is strongly extruded to ensure that the third surface and the colloid are firmly attached and fixed; or, the third surface 413 and the fourth surface 423 are coated with the glue, and then the fourth surface 423 and the third surface 413 are attached to each other and are pressed with force to make the attachment and fixation of the two surfaces firm.

For example, when the third surface 413 and the fourth surface 423 are attached and fixed by screwing, specifically, a screw hole penetrating the fourth surface 423 is opened in the first surface 411, and a screw is inserted into the screw hole from the side of the first surface 411, thereby fixing and connecting the first baffle plate 410 and the second baffle plate 420. Alternatively, the first baffle plate 410 and the second baffle plate 420 may be fixedly coupled by providing the second surface 421 with a screw hole penetrating the third surface 413 and inserting a screw into the screw hole from the side of the second surface 421.

As shown in fig. 12, the first noise reduction hole 412 may be a blind hole, the second noise reduction hole 422 may be a blind hole, and after the third surface 413 and the fourth surface 423 are bonded and fixed, an orthogonal projection overlapping portion of the first noise reduction hole 412 and the second noise reduction hole 422 on a plane perpendicular to the axis of the first noise reduction hole 412 or the second noise reduction hole 422 needs to be opened by using an opening tool so that the overlapping portions are communicated with each other.

Alternatively, as shown in fig. 13, the first noise reduction holes 412 are through holes having the same diameter throughout the third surface 413, and the second noise reduction holes 422 are through holes having the same diameter throughout the fourth surface 423. Directly set up first noise reduction hole 412 as the through-hole, set up second noise reduction hole 422 as the through-hole, when making sound-proof part 400, only need with first acoustic celotex board 410 and second acoustic celotex board 420 laminating fixed can, need not carry out extra technology again, the step is simpler. When the first noise reduction hole 412 is formed, the hole can be formed from any one of the first surface 411 or the third surface 413, and when the second noise reduction hole 422 is formed, the hole can be formed from any one of the second surface 421 or the fourth surface 423, which is more convenient. In addition, since the diameters of the first noise reduction holes 412 are equal everywhere and the diameters of the second noise reduction holes 422 are equal everywhere, it is more convenient when the holes are opened.

On this basis, the shape of the first noise reduction hole 412 may be an ellipse, a polygon (for example, a triangle, a square, a pentagon, or a hexagon), or a circle, and when the shape of the first noise reduction hole 412 is a circle, the processing is easier, the processing speed is faster, the efficiency is higher, and the circular through hole has no edge on the inner wall, and is not easy to wear.

The shape of the second noise reduction hole 422 may be an ellipse, a polygon (for example, a triangle, a square, a pentagon, or a hexagon), or a circle, and when the shape of the second noise reduction hole 422 is a circle, the second noise reduction hole is easier to process when processing the sound insulation part 400, the processing speed is faster, the efficiency is higher, and the circular through hole has no edge angle on the inner wall, and is not easy to wear.

On this basis, when the first noise reduction holes 412 are circular in shape, the diameter of the first noise reduction holes 412 may be configured to be 1 to 3 mm, and the diameter of the first noise reduction holes 412 may be configured to be 1 to 3 mm. Within this range, when the orthographic projection parts of the first noise reduction hole 412 and the second noise reduction hole 422 on the plane perpendicular to the axis of the first noise reduction hole 412 or the second noise reduction hole 422 are overlapped, the size of the overlapped and communicated part can be ensured to be smaller, and the sound insulation effect is better.

It can be understood that the diameter of the first noise reduction hole 412 and the diameter of the second noise reduction hole 422 may be unequal, for example, the diameter of the first noise reduction hole 412 is 1 mm and the diameter of the second noise reduction hole 422 is 2 mm.

The diameter of the first noise reduction hole 412 and the diameter of the second noise reduction hole 422 may also be equal, for example, when the diameter of the first noise reduction hole 412 is 1 mm, the diameter of the second noise reduction hole 422 is 1 mm. Because the diameter of the first noise reduction hole 412 is equal to the diameter of the second noise reduction hole 422, when the first noise reduction hole 412 and the second noise reduction hole 422 are formed, the hole forming process of the same step can be performed by using hole forming tools with the same specification, and the hole forming process is simpler. And since the diameters of the first noise reduction hole 412 and the second noise reduction hole 422 are equal, it is more convenient when the third surface 413 of the first soundproof plate 410 and the fourth surface 423 of the second soundproof plate 420 are attached and fixed.

On this basis, in order to fix the sound insulation part 400 in the box 100, as shown in fig. 14, the range hood 10 provided by the present application further includes a first connecting rod 500, the first connecting rod 500 is fixed between the first surface 411 and the inner wall of the box 100, one end (first end) of the first connecting rod 500 is fixedly connected to the first surface 411, the other end (second end) of the first connecting rod is fixedly connected to the inner wall of the box 100, and the first connecting rod 500 is used for fixing the sound insulation part 400 on the inner wall of the box 100. The first end of the first connection rod 500 is fixedly connected to the first surface 411, and the second end of the first connection rod 500 is fixedly connected to the first surface 411, thereby fixing the soundproof portion 400 to the inner wall of the case 100.

For example, the first connection rod 500 may be fixed to the soundproof portion 400 by forming a screw hole at a first end of the first connection rod 500, forming a mounting hole in the first surface 411 of the soundproof portion 400, and fastening the first connection rod 500 with a screw or the like through the screw hole and the mounting hole; then, a threaded hole is formed in the second end of the first connecting rod 500, a mounting seat is arranged on the inner wall of the box body 100, a mounting hole is formed in the mounting seat, and a fastening member such as a screw penetrates through the threaded hole and the mounting hole, so that the first connecting rod 500 is fixed to the inner wall of the box body 100.

The first connecting rod 500 may be a cylindrical shape, a square cylindrical shape, or any other suitable shape, which may be selected according to actual situations, and the present application is not limited herein.

In addition, the number of the first connecting rods 500 may be one, two, or more, and may be reasonably arranged according to the internal space of the box 100.

Alternatively, as shown in fig. 15, the range hood 10 provided by the present application may further include a second connecting rod 600, the second connecting rod 600 is fixed between the sidewall of the soundproof portion 400 and the inner wall of the box body 100, one end (first end) of the second connecting rod 600 is fixedly connected to the sidewall of the soundproof portion 400, the other end (second end) of the second connecting rod 600 is fixedly connected to the inner wall of the box body 100, and the second connecting rod 600 is used to fix the soundproof portion 400 to the inner wall of the box body 100.

The sound insulation part 400 is fixed to the inner wall of the case 100 by fixedly coupling one end of the second link 600 to the sidewall of the sound insulation part 400 and fixedly coupling the other end of the second link 600 to the inner wall of the case 100.

For example, the first connection rod 500 may be fixed to the soundproof portion 400 by forming a screw hole at a first end of the second connection rod 600, forming a mounting hole in a sidewall of the soundproof portion 400, and fastening the first connection rod with a screw or the like through the screw hole and the mounting hole; then, a threaded hole is formed in the second end of the first connecting rod 500, a mounting seat is arranged on the inner wall of the box body 100, a mounting hole is formed in the mounting seat, and a fastening member such as a screw penetrates through the threaded hole and the mounting hole, so that the first connecting rod 500 is fixed on the inner wall of the box body 100.

The second connecting rod 600 may be a cylinder, a square column, or any other suitable shape, which may be specifically selected according to actual situations, and the present application is not specifically limited herein.

In addition, the number of the second connecting rods 600 may be one, two, or multiple, and may be specifically configured reasonably according to the internal space of the box 100.

Alternatively, as shown in fig. 16 and 17, the range hood provided by the present application further includes a bearing plate 700 and two wing plates 800, step surfaces 710 are formed at two opposite side edges of the bearing plate 700, the two wing plates 800 are respectively fixed at edges of the two step surfaces 710, the first surface 411 or the second surface 421 is attached to the step surfaces 710 and fixed on the step surfaces 710, and then the bearing plate 700 is fixed on an inner wall of the box body 100, so that the sound insulation part 400 is fixed on the inner wall of the box body 100.

On the basis, in order to improve the smoke exhaust efficiency, in the range hood 10 provided by the present application, the blower 200 is a dual-inlet blower 200, and the dual-inlet 110 blower 200 is used for sucking air from two air inlets of the dual-inlet 110 blower 200. The double-inlet 110 fan 200 is provided with two air inlets, smoke can enter the fan 200 from the two air inlets at the same time, the smoke exhaust efficiency is higher, and the smoke exhaust effect is better.

Specifically, as shown in fig. 18, a first air intake channel 130 and a second air intake channel 140 are provided in the box 100, the first air intake channel 130 is communicated with the inlet 110, the second air intake channel 140 is communicated with the inlet 110, the dual-inlet fan 200 includes a first air inlet 210, a second air inlet 220 and an air outlet 230, the second air inlet 220 is disposed opposite to the first air inlet 210, the first air inlet 210 is communicated with the first air intake channel 130, and wind can enter from the first air inlet 210 through the first air intake channel 130; the second air inlet 220 is communicated with the second air inlet channel 140, and air can enter from the second air inlet 220 through the second air inlet channel 140; the outlet 230 is communicated with the outlet 120, and wind can be discharged through the outlet 230 and the inlet in sequence. The first air inlet channel 130 and the second air inlet channel 140 are respectively arranged, air enters the fan 200 from the first air inlet channel 130 and the second air inlet channel 140 respectively and is discharged from the air outlet 230, double-air-port air exhaust is achieved, air exhaust efficiency is improved, and smoke removal capacity is improved.

However, since the wind can enter from the first wind inlet 210 and the second wind inlet 220 at the same time, the wind can generate severe friction with the inner wall of the first wind inlet channel 130 and the inner wall of the second wind inlet channel 140 at the same time, and thus, stronger noise can be generated.

Based on this, as shown in fig. 19, a sound insulation part 400 is installed in the first air intake duct 130, and the sound insulation part 400 is fixedly connected to the inner wall of the box body 100; a soundproof portion 400 is installed in the second air intake duct 140, and the soundproof portion 400 is fixedly connected to an inner wall of the case 100. The noise insulation parts 400 are respectively installed in the first air inlet passage 130 and the second air inlet passage 140, and each noise insulation part 400 can reduce noise to further reduce noise.

It is understood that the acoustic baffle 400 may be disposed at any suitable location within the first air intake channel 130 and that the acoustic baffle 400 may be disposed at any suitable location within the second air intake channel 140. For example, the soundproof portion 400 is provided between the plane of the first intake vent 210 and the inner wall of the case 100, and the soundproof portion 400 is provided between the plane of the second intake vent 220 and the inner wall of the case 100. Since the wind power near the first air inlet 210 and the second air inlet 220 is stronger and the noise is larger, the sound insulation part 400 is disposed near the first air inlet 210 and the second air inlet 220, and the sound absorption effect is better.

In practical design, to ensure the suction force of the blower 200, only one inlet 110 is usually left on the box 100, and the size of the inlet 110 is also small, so as to meet the working requirement of the double-inlet blower 200. As shown in fig. 19, a third air intake channel 150 is further disposed in the box 100, the third air intake channel 150 communicates with the first air intake channel 130 and the second air intake channel 140, the third air intake channel 150 communicates with the inlet 110, and wind can enter from the second air inlet 220 through the third air intake channel 150 and the second air intake channel 140 in sequence. The third air inlet channel 150 is arranged in the box 100, and mainly an inlet 110 needs to be formed in the box 100, so that air can enter from the inlet 110, and is divided by the third air inlet channel 150, and one part of air flows to the first air inlet 210, and the other part of air flows to the second air inlet 220, so that smoke discharge is realized.

However, when the wind passes through the third air inlet channel 150, the wind also rubs against the inner wall of the third air inlet channel 150, which generates strong noise.

Based on this, as shown in fig. 19, in the range hood 10 of the present application, the soundproof portion 400 is installed in the third air intake passage 150, and the soundproof portion 400 is fixedly connected to the inner wall of the case 100. When sound insulation part 400 is installed in third air intake duct 150, sound generated by friction between the air and the inner wall of third air intake duct 150 is absorbed by sound insulation part 400, thereby further reducing noise.

It is understood that the soundproof portion 400 may be disposed at any suitable place in the third air intake passage 150, and may be disposed according to the inner space of the case 100.

In some embodiments, as shown in fig. 20, there may be a discharge air passage between the outlet 230 of the blower 200 and the outlet 120 of the case 100, through which the air is discharged from the outlet 120, and due to the small size of the outlet 120, strong noise may be generated near the outlet 120 during the discharge of the air.

Based on this, as shown in fig. 20, in the range hood 10 of the present application, the soundproof portion 400 is installed in the exhaust passage, and the soundproof portion 400 is fixedly connected to the inner wall of the cabinet 100. The noise generated at the outlet 120 is absorbed by the soundproof portion 400 by installing the soundproof portion 400 in the discharge duct, thereby further reducing the noise.

It is understood that the above description of the installation position of the sound insulation part 400 is only an example, and in actual installation, in order to improve the overall noise reduction effect of the range hood 10, the sound insulation part 400 provided in the present application may be installed at any suitable place in the box 100, and may be specifically and reasonably arranged according to the spatial layout in the box 100.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. A range hood, comprising:

the box body is provided with an inlet and an outlet;

the fan is arranged in the box body and used for sucking the oil smoke from the inlet and discharging the oil smoke from the outlet;

the sound insulation part is fixed in the box body and provided with a first surface and a second surface which are deviated from each other, gaps are reserved between the first surface and the inner wall of the box body, the first surface is provided with a plurality of first noise reduction holes, the second surface is provided with a plurality of second noise reduction holes, the first noise reduction holes and the second noise reduction holes are arranged in a one-to-one correspondence mode and are communicated with each other, the axes of the first noise reduction holes and the second noise reduction holes are parallel, and the first noise reduction holes and the corresponding orthographic projections of the second noise reduction holes on a plane perpendicular to the axes are partially overlapped.

2. The range hood of claim 1, wherein the sound insulation section comprises:

a first baffle, the first face positioned on the first baffle, the first baffle having a third face thereon, the third face positioned away from the first face;

the second acoustic celotex board, the second surface is located on the second acoustic celotex board, the fourth surface has on the second acoustic celotex board, the fourth surface with the second surface deviates from the setting mutually, the third surface with the fourth surface is laminated fixedly each other.

3. The range hood of claim 2, wherein the first noise reduction holes are through holes extending through the third surface and having an equal diameter throughout, and wherein the second noise reduction holes are through holes extending through the fourth surface and having an equal diameter throughout.

4. The range hood of claim 3, wherein the through-holes are circular through-holes.

5. The range hood of claim 4, wherein the aperture of the through-holes is 1-3 millimeters.

6. The range hood of any one of claims 1 to 5, further comprising a first connecting rod fixed between the first surface and the inner wall of the box body, wherein one end of the first connecting rod is fixedly connected with the first surface, the other end of the first connecting rod is fixedly connected with the inner wall of the box body, and the first connecting rod is used for fixing the sound insulation part on the inner wall of the box body.

7. The range hood of any one of claims 1 to 5, further comprising a second connecting rod, the second connecting rod is fixed between the sidewall of the sound insulation part and the inner wall of the box body, one end of the second connecting rod is fixedly connected with the sidewall of the sound insulation part, the other end of the second connecting rod is fixedly connected with the inner wall of the box body, and the second connecting rod is used for fixing the sound insulation part on the inner wall of the box body.

8. The range hood of any one of claims 1-5, wherein the fan is a dual inlet fan configured to draw air from two air inlets of the dual inlet fan.

9. The range hood of claim 8, wherein the box has a first air inlet channel and a second air inlet channel, the dual inlet fan comprising:

the first air inlet is positioned on one side where the first air inlet channel is positioned, the first air inlet is communicated with the inlet, the first air inlet is communicated with the first air inlet channel, the sound insulation part is installed in the first air inlet channel, and the sound insulation part is fixedly connected with the inner wall of the box body;

the second air inlet channel is positioned on one side where the second air inlet is positioned, the second air inlet is communicated with the inlet, the second air inlet is communicated with the second air inlet channel, the sound insulation part is installed in the second air inlet channel, the sound insulation part is fixedly connected with the inner wall of the box body, and the second air inlet is arranged opposite to the first air inlet;

and the air outlet is communicated with the outlet.

10. The range hood of claim 9, wherein a third air inlet channel is further arranged in the box body, the third air inlet channel is communicated with the first air inlet channel, the third air inlet channel is communicated with the second air inlet channel, the third air inlet channel is communicated with the inlet, the sound insulation part is installed in the third air inlet channel, and the sound insulation part is fixedly connected with the inner wall of the box body.

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