CN111237828A - A hood oil net - Google Patents

Abstract

The invention discloses a range hood oil net, comprising a first oil net and a second oil net, wherein the second oil net is arranged above the first oil net, and the first oil net and the second oil net are respectively An oil guide column is formed, a gap for allowing air to pass between two adjacent oil guide columns is formed, and the oil guide column is a concave arc structure with an opening facing upward. In the oil net of the present invention, the oil guide column is designed as a concave arc surface structure with an upward opening, and the arc surface structure is more conducive to reflection and refraction to block noise, and meanwhile, the arc surface structure has low resistance to gas.

Description

A hood oil net

technical field

The invention relates to an oil net, in particular to an oil net with a noise reduction function.

Background technique

When the built-in multi-blade centrifugal fan of the range hood is running, the noise generated is introduced into the room through the following three ways: 1. The noise enters the room from the entrance through the air duct of the range hood; 2. The noise is reflected by the wall of the air duct and enters the room through the entrance of the air duct 3. The noise is introduced into the room through the outlet of the air duct. After testing, the noise at the entrance of the oil network is 13dB larger than the noise in the four directions of front, rear, left, right, and right. Therefore, reducing the noise at the entrance of the range hood can greatly reduce the noise of the range hood. The existing range hood filter screen is generally single-layer or double-layer or multi-layer structure, which mainly plays the role of filtering and condensing oil fume. Based on this, how to propose an oil screen with noise reduction function is the main solution of the present invention. technical issues.

SUMMARY OF THE INVENTION

In order to solve the technical problem of high noise of the fan of the existing range hood, the present invention proposes an oil net, which can reflect the noise and reduce the noise introduced into the room.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions to be realized:

An oil screen, comprising a first oil screen and a second oil screen, the second oil screen is arranged above the first oil screen, the first oil screen and the second oil screen are respectively formed with oil guide columns, There is a gap for air to pass between two adjacent oil guide columns, and the oil guide columns are concave arc structures with openings facing upward.

Further, the oil guide columns of the first oil net and the oil guide columns of the second oil net are distributed in staggered teeth.

Further, the cross section of the oil guide column is parabolic, the parabolic equation is x²=2py, and the value range of p is 1.1 mm-1.8 mm.

Further, the width of the mouth of the oil guide column is L, and the distance between the two oil guide columns is 0.9L-1.1L, where L>0.

Further, the width of the mouth of the oil guide column is L, and the distance between the first oil net and the second oil net is 7L-1.1L, where L>0

Further, a closed oil groove is provided below the first oil net, and the oil dripping from the first oil net falls into the oil groove.

Further, the first oil net and the second oil net have a planar structure, a frustum-like structure or an inverted frustum-like structure.

Further, when the first oil screen and the second oil screen are in frustum-shaped structures, the lower end of the first oil screen is folded outward to form an outer flange, and the lower end of the second oil screen has a The vertical edge is lapped on the outer flange, the outer flange is provided with a number of oil guide holes, and the orthographic projection of the oil guide holes toward the plane where the oil groove is located is located in the oil groove .

Further, at least one boss with an internal thread is formed on the upper surface of the outer flange, the vertical edge is provided with a connecting lug corresponding to the boss, and the connecting lug is provided with a screw. The screw is screwed into the inner thread of the boss through the screw hole.

Further, a filter screen is also arranged between the first oil screen and the second oil screen.

Compared with the prior art, the advantages and positive effects of the present invention are: the oil net of the present invention designs the oil guide column as a concave arc structure with an upward opening, and the arc structure is more conducive to reflection and refraction to block noise and absorb oil. When the hood is working, after the noise sound wave generated by the fan hits the reflective wall of the first oil net, most of it is reflected back to the air duct through the wall, and part of the noise passes through the first oil net to the second oil net, and is reflected by the second oil net. The wall is reflected, and only a small amount of sound waves enter the room, which can effectively reduce noise. At the same time, the arc structure has little resistance to the gas, and the upward airflow enters the first oil net first, and moves obliquely upward along the outer surface of the oil guide column. When it encounters the outer surface of the oil guide column of the second oil net, the air flow produces two At the second turn, a part of the air moves obliquely upward along the shape of the second layer of oil guide column, and is sucked into the main fan, and the other part of the air flows to the inner surface of the first layer of oil network oil guide column, and after a gyration, it continues upward and is sucked in main fan. Through such a gas movement path, the contact area between the fume gas and the oil guide column of the oil net is increased, and the effect of oil and air separation is better. Road system, dripping into the oil cup, there is no perforation dripping oil.

Other features and advantages of the present invention will become more apparent upon reading the detailed description of the embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

1 is a schematic structural diagram of an embodiment of a range hood oil net proposed by the invention;

Fig. 2 is the enlarged view of A part of Fig. 1;

Fig. 3 is the B part enlarged view of Fig. 1;

Fig. 4 is the C part enlarged view of Fig. 1;

Figure 5 is a cross-sectional view of the oil guide column in Figure 2;

Fig. 6 is the air flow simulation diagram of the oil guide column in Fig. 5;

Fig. 7 is the cross-sectional view of the oil guide column of the first oil net and the second oil net in Fig. 2;

Fig. 8 is the air flow simulation diagram of the oil guide column in Fig. 7;

9 is a schematic structural diagram of another embodiment of the range hood oil net proposed by the present invention;

FIG. 10 is a schematic structural diagram of another embodiment of the range hood oil net proposed by the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Embodiment 1, this embodiment proposes a range hood oil net, as shown in FIG. 1 to FIG. 5 , including a first oil net 11 and a second oil net 12 , and the second oil net 12 is arranged above the first oil net 11 . , the first oil net 11 has an oil guide column 110, the second oil net 12 has an oil guide column 120, and there is a gap for air to pass between the two adjacent oil guide columns. The two adjacent oil guide columns of the first oil net 11 A first gap 111 is formed therebetween, and a second gap 121 is formed between two adjacent oil guide columns of the second oil net 12. Both the oil guide column of the first oil net 11 and the oil guide column of the second oil net 12 are open. Upward concave arc structure. By designing the oil guide column as a concave arc structure with the opening facing upward, the arc structure is more conducive to reflection and refraction to block noise, and at the same time, the arc surface has the least resistance to the gas, and the noise generated by the fan when the range hood is working After the sound wave hits the oil guide column of the first oil net 11, most of it is reflected back to the air duct through the arc surface of the oil guide column of the first oil net 11, and part of the noise reaches the second oil net through the first gap 111, and is transmitted by the second oil net. The arc surface of the oil guide column of the oil screen is reflected, the reflected sound waves are reflected back to the air duct through the first gap, and finally only a small amount of sound waves enter the room through the second gap 112, which can effectively reduce noise. As shown in Figure 6, part of the rising airflow directly passes through the gap between the oil guide columns, and the other part rises to the oil guide column. Due to the smooth arc structure of the oil guide column, the airflow follows the arc of the oil guide column. The outer surface of the shape moves obliquely upward, and the arc structure of the oil guide column has the least resistance to the gas.

The oil guide column of the first oil net 11 and the oil guide column of the second oil net 12 are distributed with staggered teeth. As shown in Figures 7 and 8, the airflow moves obliquely upward along the arc-shaped outer surface of the oil guide column and rises upward. The air flow first passes through the first oil net 11, a part of the air flow rises to the oil guide column of the first oil net, the air flow moves obliquely upward along the arc-shaped outer surface of the oil guide column and continues to rise through the first gap 111, and the other part of the air flow Passing directly through the first gap 111 and directly passing through the first oil net 11, since the oil guide column of the first oil net 11 and the oil guide column of the second oil net 12 are distributed in staggered teeth, this part of the airflow will pass through the first gap 111. When encountering the oil guide column of the second oil net 12, and encountering the arc-shaped outer surface of the oil guide column of the second oil net, the air flow produces a second turn, and a part of it follows the shape of the oil guide column of the second oil net obliquely upward. When it moves, it is sucked into the main fan, and another part of the airflow flows to the inner surface of the oil guide column of the first layer of oil network. Through such a gas movement path, the contact area between the fume gas and the oil guide column of the oil net is increased, and the effect of oil and air separation is better. Road system, dripping into the oil cup, there is no perforation dripping oil.

As shown in FIG. 5 , preferably the cross section of the oil guide column is parabolic, wherein the oil guide column refers to the oil guide column of the first oil net 11 and/or the oil guide column of the second oil net 12 . When the first oil net When the oil guide column of 11 and the second oil network 12 are both parabolic, the effect is best. The parabolic equation is x²=2py, where the x axis is along the horizontal direction and perpendicular to the length direction of the oil guide column, and the y axis Along the vertical direction and over the central axis of the oil guide column, the value of p ranges from 1.1 mm to 1.8 mm. Experiments show that the shape of the oil guide column set according to the parabolic equation has less resistance to the gas than a simple arc or a straight line, and is more conducive to blocking noise through reflection and refraction.

Combined with the size of the range hood, the size of the oil screen should not be too large or too small, as shown in Figure 5 and Figure 7, in order to facilitate the processing of the oil screen in practice and reduce the resistance of the oil screen to the airflow, the parabolic opening size L is the maximum. The best value range is 6mm-8mm. It can not only leave enough gaps to prevent the wind, but also ensure that there is enough contact area with the oil fume to separate the oil fume.

The shape of the first oil net 11 and the second oil net 12 can be a plane structure as shown in FIG. 10 , a frustum-like structure or an inverted frustum-like structure as shown in FIG. The type structure should be appropriately designed. When the oil screen adopts a truncated cone structure or an inverted truncated cone structure, it has at least 4 inclined sides, and each side is arranged with a number of oil guide columns in the column direction. The mentioned gap between two adjacent oil guide columns that allows oil fume to pass through refers to the gap between two adjacent oil guide columns located on the side of the same oil screen, and between two adjacent oil guide columns located on different sides. The connection part of the two sides does not need to open a gap. The lengths of the oil guide columns located at different positions on the same plane may be different, and they are reasonably set according to the shape of the plane on which they are located.

The oil guide column has two arc sides, and the ends of the two adjacent arc sides are connected by connecting edges, and the two arc sides are respectively located on the two adjacent oil guide columns, as shown in Figure 2. Taking the first oil net as an example, the oil guide column 110 is adjacent to the oil guide column 112, the oil guide column 110 has arc edges 110a and 110b, the oil guide column 112 has arc edges 112a and 112b, and the arc edge 110b is adjacent to the arc edge 112a and the two arc edges are respectively located on two different oil guide columns (oil guide column 110 and oil guide column 112), and the arc edge 110b and the arc edge 112a are connected by the connecting edge 115, as shown in FIG. Both ends of the edge are connected with connecting edges, so the two adjacent arc edges and the end edges at both ends form a closed structure, which can better guide the oil fume, and at the same time, it is beneficial to increase the contact area with the oil fume and maximize the to separate the fumes.

Preferably, as shown in FIG. 5 , the distance between two adjacent oil guide columns is M, and the optimal value range of M is 0.9L-1.1L. The distance between two adjacent oil guide columns is also the width of the gap port portion between the two oil guide columns. Within the range of this width value, there will not be large wind resistance, but also the arc surface area of the oil guide column is ensured, and the contact with the oil fume is more sufficient.

The optimum distance between the first oil net 11 and the second oil net 12 is 7L-1.1L, where L is the width of the mouth of the oil guide column.

Taking the oil net of frustum-shaped structure as an example, the oil guide columns of the first oil net 11 and the second oil net 12 are in contact with the oil fume, and the oil in the oil fume is condensed to form oil droplets, which flow along the oil guide column, and the first A closed oil groove 13 is provided below the oil screen 11, and oil droplets flowing from the first oil screen 11 fall into the oil groove 13 to prevent it from dripping on the cabinet table and increasing the cleaning burden.

The oil tank 13 is a closed structure, which is inconvenient to disassemble and clean. Preferably, the oil tank 13 is connected with an oil cup (not shown in the figure), and the oil in the oil tank 13 flows into the oil cup. The volume of the oil cup is smaller than that of the oil tank, which is convenient for assembly. And disassemble, easy to clean.

Still taking the first oil screen and the second oil screen as truncated cone-shaped structures as an example, the lower end of the first oil screen 11 is folded outward to form an outer flange 113, and the lower end of the second oil screen 12 has a circle of vertical edges 122. The vertical side 122 of the second oil net 12 is overlapped on the outer flange 113. The outer flange 113 is provided with a number of oil guide holes 114. The orthographic projection of the oil guide holes toward the plane where the oil groove 13 is located is located in the oil groove 13. The oil droplets condensed by the second oil net 12 flow downward along the oil guide column. Since the vertical edge 122 is overlapped with the valgus edge 113, the oil droplets of the second oil net continue to flow downward along the vertical edge to the eversion. At the same time, the oil droplets condensed by the first oil net flow down to the outer flange 113 along the oil guide column, and the oil droplets fall into the oil groove 13 through the oil guide holes. The number and size of the oil guide holes It depends on the size and shape of the first oil net 11 and is not limited here. The circumference of the oil guide hole may be lower than other positions of the outer flange 113 , which is beneficial to gather oil droplets.

The second oil net 12 is fixed on the fume collecting hood. The first oil net 11 can be fixed with the fume collecting hood or with the second oil net. The upper surface of the side 113 is formed with at least one boss 116 with an internal thread. The vertical side 122 has connection ears 123 corresponding to the bosses 116 one-to-one. The connection ears 123 are provided with screw holes 124, and the screws pass through the screws. The hole 124 is screwed into the inner thread of the boss 116 , thereby fixing the first oil screen 11 and the second oil screen. The boss 116 can be fixed on the first oil mesh 11 by welding or riveting. The screw holes 124 can be through holes or countersunk holes. The number of the screw holes 124 is consistent with the number of the bosses 116 . The number of the bosses 116 can be determined according to the size and shape of the outer flange 113 . Make an evasion.

Between the first oil screen 11 and the second oil screen 12, a filter screen 14 can be added as required, and the filter screen 14 can be in various forms, such as activated carbon, metal wire mesh or metal mesh plate.

Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those of ordinary skill in the art within the scope of the present invention should also belong to protection scope of the present invention.

Claims (10)

1. A lampblack absorber oil net which characterized in that: including first oil net and second oil net, second oil net sets up first oil net top, a plurality of oil columns of leading of having arranged in proper order on one or more sides of first oil net and second oil net have between the adjacent two oil columns to hold the clearance that the air passes through, lead the oil column and be the concave cambered surface structure that the opening is up.

2. The oil screen of claim 1, wherein: and the oil guiding columns of the first oil net and the second oil net are distributed in a staggered tooth manner.

3. The oil screen of claim 1, wherein: the cross section of the oil guide column is parabolic, the parabolic equation is x =2py, and the value range of p is 1.1 mm-1.8 mm.

4. The oil screen of claim 3, wherein: the width of the mouth of each oil guide column is L, the distance between the two oil guide columns is 0.9L-1.1L, and L is more than 0.

5. The oil screen of claim 3, wherein: the width of the mouth of the oil guide column is L, and the distance between the first oil net and the second oil net is 7L-1.1L, wherein L is larger than 0.

6. Oil screen according to any of claims 1-5, characterized in that: the oil tank is characterized in that a circle of closed oil groove is formed below the first oil net, and oil dropping from the first oil net falls into the oil groove.

7. Oil screen according to any of claims 1-5, characterized in that: the first oil net and the second oil net are of a plane structure, a frustum-shaped structure or an inverted frustum-shaped structure.

8. The oil screen of claim 7, wherein: when the first oil screen and the second oil screen are of frustum-shaped structures, the lower end part of the first oil screen is turned outwards to form an outward turned edge, the lower end part of the second oil screen is provided with a circle of vertical edges, the vertical edges are lapped on the outward turned edge, a plurality of oil guide holes are formed in the outward turned edge, and the oil guide holes face the orthographic projection of the plane where the oil groove is located and are located in the oil groove.

9. The oil screen of claim 8, wherein: the upper surface of the outward flanging is provided with at least one boss with internal threads, the vertical edge is provided with connecting lugs which are arranged in one-to-one correspondence with the bosses, the connecting lugs are provided with screw holes, and screws penetrate through the screw holes and are screwed into the internal threads of the bosses.

10. Oil screen according to any of claims 1-5, characterized in that: and a filter screen is also arranged between the first oil net and the second oil net.

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