CN111795415A - Air deflectors and range hoods - Google Patents

Abstract

The invention provides a flow guide piece and a range hood, and relates to the technical field of kitchen appliances. The border that the water conservancy diversion spare both ends in this scheme are close to the fresh air inlet more, and the difference that reaches the distance of fresh air inlet after the air current flows from the middle of the water conservancy diversion spare and reach the distance of fresh air inlet after the air current flows from the water conservancy diversion spare tip is compared less among the prior art, consequently, in this scheme, in the circumference of fresh air inlet, the air current velocity of flow difference of each position between water conservancy diversion spare and the fresh air inlet is littleer, stability when can improving gas flow, noise reduction.

Description

Air deflectors and range hoods

technical field

The invention relates to the technical field of kitchen appliances, in particular to a flow guide and a range hood.

Background technique

A range hood is a common appliance in the kitchen. The existing range hood includes a fume collecting hood and a case that is positioned above the fume collecting hood and is perpendicular to it. The inside of the case is provided with a volute, and the volute includes a front cover plate, a rear cover plate and an annular intermediate shell connecting the two. , the front cover plate and the rear cover plate are respectively provided with front air holes and rear air inlet holes, and a downwardly protruding deflector is connected between the lower edge of the front cover and the lower edge of the rear cover. Cover the middle case. The airflow flowing into the chassis from bottom to top will flow into the front air holes and the rear air inlet holes respectively under the diversion effect of the deflector, so as to prevent the airflow from directly hitting the middle casing of the volute and reduce noise.

However, the existing deflector extends in the horizontal direction. Since the air inlet hole of the volute is generally designed in a circular shape, the extension direction of the deflector is perpendicular to the axis of the air inlet hole. Therefore, after the deflector divides the air , the distance between the air in the middle of the deflector and the air at both ends of the deflector to the air inlet holes is different, so after the air flows, turbulence will be generated due to air pressure, which cannot achieve a good noise reduction effect.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a range hood, so as to alleviate the technical problem of high noise of the existing range hood.

In the first aspect, an embodiment of the present invention provides an air guide member, the air guide member is used to be placed between a fan and an air inlet, a circular air inlet hole is provided on the side of the fan, and the guide member is The flow member is used for guiding the airflow flowing from the air inlet to the side of the fan with the air inlet hole, and the flow guide member is bent along the circumferential direction of the air inlet hole.

Further, the air guide has two air guide surfaces arranged at an included angle, and the two air guide surfaces are used to divide the airflow and guide it to the air inlet hole on the left side of the fan and the air inlet on the right side respectively. hole.

Further, along the circumferential direction of the air inlet hole, the air guide member is curved in an arc shape.

Further, along the circumferential direction of the air inlet hole, the air guide member is curved in a circular arc shape.

Further, along the circumferential direction of the air inlet hole, the air guide member includes a first air guide portion and a second air guide portion that are connected in sequence at an included angle.

In a second aspect, an embodiment of the present invention provides a range hood, wherein the range hood includes a chassis, a fan, and the above-mentioned air guide;

Both the fan and the air guide are installed in the casing.

Further, both sides of the fan are provided with air inlet holes, and the air guide member has two air guide surfaces arranged at an included angle, and the two air guide surfaces are used to divide the air flow and guide it to the direction of the air flow respectively. The air inlet hole on the left side of the fan and the air inlet hole on the right side;

There is a gap between the air guide and the fan.

Further, both ends of the air guide element are respectively connected to the front plate and the rear plate of the chassis.

Further, the distance between the air inlet of the case and the center of the air inlet hole is the first distance H, and the distance between the air inlet of the case and the position farthest from the air inlet hole on the air guide is the first distance H. Two distances h, and the ratio of the second distance to the first distance is in the range of 0≤h/H≤0.35.

Further, the lower edge of the rear panel of the chassis is provided with a folded edge that is bent toward one side of the front panel of the chassis, and the air guide member is attached to the folded edge.

In the air guide and the range hood provided by the embodiment of the present invention, the air guide is used to be placed between the fan and the air inlet to play a role of guiding. When the fan is started, the air flows from the air inlet to the direction of the fan. During the movement, the air first comes into contact with the deflector, and the propagation direction of the air changes under the blocking of the deflector. flow on one side until it is sucked into the air inlet. Different from the prior art, in this solution, in the extending direction of the air guide member, the air guide member is curved, and the air guide member is bent in a direction away from the air inlet hole. However, in the prior art, the air guide is straight, and the extension direction of the air guide is perpendicular to the axis of the air inlet hole. The difference in the distance from the end to the air inlet hole after the end flows out is large. Compared with the prior art, the two ends of the air guide in this solution are closer to the edge of the air inlet hole, and the airflow flows out from the middle of the air guide and reaches the air inlet. Compared with the difference in the prior art, the difference between the distance of the air hole and the distance from the air flow to the air inlet hole after flowing out from the end of the air guide is smaller than that in the prior art. Therefore, in this solution, in the circumferential direction of the air inlet hole, The difference in airflow velocity at each position between the deflector and the air inlet hole is smaller, which can improve the stability of the gas flow and reduce noise.

Description of drawings

In order to illustrate the specific 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 specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

1 is a schematic diagram of the cooperation between a flow guide and a fan provided in Embodiment 1 of the present invention;

Fig. 2 is the schematic diagram of A direction in Fig. 1;

Fig. 3 is the schematic diagram of B direction in Fig. 1;

Fig. 4 is the schematic diagram of C direction in Fig. 1;

5 is a schematic diagram of the cooperation between the air guide and the fan provided in Embodiment 2 of the present invention;

Fig. 6 is the schematic diagram of D direction in Fig. 5;

7 is a cross-sectional view of a range hood provided in an embodiment of the present invention in one direction;

8 is a schematic diagram of the internal structure of a chassis of a range hood provided by an embodiment of the present invention;

FIG. 9 is a cross-sectional view of the range hood provided by the embodiment of the present invention in another direction.

Icon: 100-chassis; 110-front panel; 120-rear panel; 121-folding edge; 130-left side wall; 140-right side wall; 200-fan; 210-air inlet; 300-air guide; 410 - inner cavity; 420 - outer cavity; 430 - oil net; 510 - first guide part; 520 - second guide part; 600 - gap.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are 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.

In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "left side", "right side", "front end", "rear end", "vertical", etc. indicate The orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation or be constructed in a specific orientation. and operation, and therefore should not be construed as limiting the present invention.

Example 1

The air guide 300 provided in the embodiment of the present invention can be applied to various exhaust devices, such as a range hood, a fresh air system, and the like.

As shown in FIG. 1-FIG. 4, the air guide 300 is used to be placed between the fan 200 and the air inlet, and the airflow flows along the direction of the air inlet, the air guide 300 and the fan 200, and the air guide 300 starts from the air guide 300. to the diversion effect. The side of the fan 200 is provided with a circular air inlet hole 210, and the air guide member 300 is located on the outer side of the air inlet hole 210 in the circumferential direction. One side of the fan 200 with the air inlet hole 210 is different from the prior art, the air guide member 300 is bent along the circumferential direction of the air inlet hole 210, that is, the length of the air guide member In the direction, the air guide member is curved, and the air guide member 300 is bent toward the side away from the air inlet hole 210 .

When the fan 200 is started, the airflow flows from the air inlet to the fan 200 , the airflow first contacts the air guide 300 during the movement, and the air flow changes its propagation direction under the blocking of the air guide 300 , and the air moves toward the fan 200 . The side with the air inlet hole 210 flows until it is sucked into the air inlet hole 210 . Different from the prior art, in this solution, the air guide member 300 is bent along the circumferential direction of the air inlet hole 210 . Therefore, both ends of the air guide member 300 are respectively bent toward the air inlet hole 210 . In the prior art, the air guide is straight, the extending direction of the air guide is perpendicular to the axis of the air inlet hole, the air flow from the middle of the air guide 300 reaches the air inlet hole 210 and the distance from the air flow from the air guide The difference in the distance from the air inlet hole 210 to the air inlet hole 210 after the end of the air guide element 300 flows out is large. Compared with the prior art, the two ends of the air guide element 300 in this solution are closer to the edge of the air inlet hole 210, and the airflow flows from the air guide element. The difference between the distance from the middle of 300 to the air inlet hole 210 and the distance from the air flow from the end of the air guide 300 to the air inlet hole 210 is smaller than the difference in the prior art. Therefore, in this scheme , in the circumferential direction of the air inlet hole 210 , the difference in airflow velocity at each position between the air guide 300 and the air inlet hole 210 is smaller, which can improve the stability of the gas flow and reduce noise.

In other embodiments, the number of the air inlet holes 210 of the existing fan 200 may be one, then the air guide member 300 has a guide surface, and the guide surface inclined with respect to the vertical is used to guide the air flow. In the embodiment, the flow guide member 300 only plays the role of flow guide.

As shown in FIG. 1 , in this embodiment, the air guide member 300 has two air guide surfaces arranged at an included angle, and the two air guide surfaces are used to divide the airflow and guide it to the left side of the fan 200 respectively. The air inlet hole 210 and the air inlet hole 210 on the right side.

The number of air inlet holes 210 of the existing fan 200 may be two, and the two air inlet holes 210 are coaxial and located on the left and right sides of the fan 200 respectively. The two air guide surfaces are arranged in a "V" shape. For example, the air guide 300 is used in the field of range hoods. The range hood includes a case 100 and a fan 200. The fan 200 and the air guide 300 are located inside the case 100. Piece 300 may be located below blower 200 . The fan 200 can be a volute fan 200. Air inlet holes 210 are provided on the left and right sides of the fan 200. The fan 200 is located in the middle of the chassis 100. The cross section may be in a "V" shape, which has two guide surfaces that can divide and guide the airflow to the left and right sides of the fan 200 . The gap 600 between the left side of the fan 200 and the left side wall 130 of the chassis 100 forms a left flow channel, the right side of the fan 200 and the right side wall 140 of the chassis 100 form a right flow channel, and the two divided airflows follow The left flow channel and the right flow channel respectively enter the air inlet hole 210 on the left side of the fan 200 and the air inlet hole 210 on the right side.

Along the circumferential direction of the air inlet hole 210 , the air guide member 300 may be curved in an arc shape.

Because the air inlet hole 210 is circular, in order to better correspond to the degree of curvature of the edge of the air inlet hole 210 close to the air guide member 300, the longitudinal section of the air guide member 300 may be arc-shaped, for example, a circular arc shape or a Ellipse arc.

Further, the degree of curvature of the longitudinal section of the air guide member 300 may correspond to the degree of curvature of the edge of the air inlet hole 210 , that is, the longitudinal section of the air guide member 300 may be in the shape of an arc, and the radius of the arc is greater than that of the air inlet hole 210 . The radius can completely cover the bottom of the fan 200, and along the direction of the airflow from the guide member 300 to the fan 200, the distances from each position on the guide surface to the edge of the air inlet hole 210 are equal, so the stability of the gas flow is relatively high. good.

Because the flow guide 300 is a curved arc structure, the flow guide surface is also an arc surface. The axis of the air inlet hole 210 is parallel to the axis of the air inlet hole 210 , and the guide surface can guide the air flow toward the middle position of the air inlet hole 210 .

Example 2

As shown in FIG. 5 and FIG. 6 , the difference from Embodiment 1 is that along the circumferential direction of the air inlet hole 210 , the air guide member 300 includes a first air guide portion 510 and a second air guide portion 510 and a second air guide portion 510 and a first air guide portion 510 and a second air guide portion 510 and a first air guide portion 510 and a first air guide portion 510 and a second air guide portion 510 and a first air guide portion 510 and a first air guide portion 510 and a second air guide portion 510 and a first air guide portion 510 and a second air guide portion 510 and a first air guide portion 510 and a first air guide portion 510 and a second air guide portion 510 and a first air guide portion 510 and a second air guide portion 510 and a first air guide portion 510 and a second air guide portion 510 and a first air guide portion 510 and a second air guide portion 510 , which are connected in sequence at an included angle, along the circumferential direction of the air inlet hole 210 , are included. Two flow guides 520 .

The air guide member 300 may be located directly below the fan 200. Along the circumferential direction of the air inlet hole 210, the air guide member 300 includes a first air guide portion 510 and a second air guide portion 520 that are inclined with respect to the vertical direction. In addition, the inclination directions of the first air guide portion 510 and the second air guide portion 520 are opposite. The first air guide portion 510 and the second air guide portion 520 may extend in a linear direction, and the cross-sectional shape of the air guide member 300 in the longitudinal direction may be a "V" shape.

When the flow guide 300 has only one flow guide surface, it can be an inclined plate-like structure, and when it has two flow guide surfaces, its cross-sectional shape can be a "V" shape.

From one end of the air guide member 300 to its middle position, the first air guide portion 510 is gradually inclined downward, and from the middle position to the other end, the second air guide portion 520 gradually rises, so that the air guide portion 520 is gradually raised. The bending direction of the piece 300 is consistent with the bending direction of the lower edge of the air inlet hole 210 .

As shown in FIGS. 7-9 , the range hood provided by the embodiment of the present invention includes a case 100 , a fan 200 , and the above-mentioned air guide 300 ; Because the range hood uses the above-mentioned air guide member 300 , the range hood has the advantages of the above-mentioned air guide member 300 .

For a general top suction or side suction range hood, the air guide 300 is located directly below the fan 200 , while for an integrated range hood, the air guide 300 is located above the fan 200 . For the convenience of description, in this embodiment, a top suction range hood is used as an example for description.

The air inlet hole of the fan 200 faces the left or right side of the range hood, the air guide 300 is located below the fan 200, and the air guide 300 extends along the front and rear directions of the range hood, and in its extending direction, the air guide The piece 300 is curved, and the deflector 300 is curved directly downward.

Both sides of the fan 200 are provided with air inlet holes 210, and the air guide member 300 has two air guide surfaces arranged at an included angle, and the two air guide surfaces are used to divide the airflow and guide it to the direction of the air flow respectively. The air inlet hole 210 on the left side of the fan 200 and the air inlet hole 210 on the right side; there is a gap 600 between the air guide 300 and the fan 200 .

In the above-mentioned embodiment, the fan 200 has two air inlet holes 210, which are located on the left and right sides of the fan 200, one is the main air inlet hole, and the other is the auxiliary air inlet hole, and in the prior art, the The air intake volume of the two air inlet holes 210 of each type of fan 200 is different. The air intake volume of the main air inlet hole is larger than that of the auxiliary air inlet hole. Under the action of pressure, the airflow flowing to the side of the auxiliary air inlet partially flows into the side of the main air inlet, so that the airflow that cannot be completely discharged from the side of the auxiliary air inlet can flow into the main air through the gap 600. One side of the air inlet hole, so as to make up for the insufficient air intake of the main air inlet hole and achieve the purpose of adjusting the air inlet.

Two ends of the air guide member 300 are respectively connected to the front plate 110 and the rear plate 120 of the chassis 100 .

The fan 200 is installed in the casing 100, and there are narrow gaps between the front and rear ends of the fan 200 and the front plate 110 and the rear plate 120 of the casing 100, respectively, so as to form a flow dead zone. Two ends of the air guide 300 are respectively connected with the front panel 110 and the rear panel 120 of the chassis 100 , so that the air guide 300 covers the bottom of the fan 200 in the front and rear directions, and guides the bottom-up airflow to the side of the fan 200 , so that the airflow can be effectively prevented from entering the flow dead zone.

Because the air guide 300 is curved, and its two ends are tilted toward the fan 200 , the space between the air guide 300 and the fan 200 is relatively small, and the space for the flow channel is left as large as possible. However, in the prior art, the air guide structure is straight, the extending direction of the air guide member 300 is perpendicular to the axis of the air inlet hole 210 , and when its minimum height is the same as the minimum height of the air guide member 300 of the present application, the prior art The space between the air guide structure in the fan 200 and the fan 200 is large, which will occupy too much space for the flow channel, which affects the airflow into the chassis 100 .

The air guide 300 and the front plate 110 and the rear plate 120 of the chassis 100 can be connected by screws. Resonance occurs with the rear panel 120 of the chassis 100 due to airflow, and at the same time, the structural strength of the chassis 100 can be improved.

Further, the distance between the air inlet of the case 100 and the center of the air inlet hole 210 is the first distance H, and the distance between the air inlet of the case 100 and the position on the air guide 300 farthest from the air inlet hole 210 is the first distance H. The distance between them is the second distance h, and the ratio of the second distance to the first distance is in the range of 0≤h/H≤0.35.

Since the closer to the air inlet hole 210 of the fan 200 is, the higher the air velocity is. Therefore, if the air guide 300 is arranged near the fan 200 , the impact of the flowing air on the air guide 300 is also greater. When 0≤h/H≤0.35, the diversion effect of the air guide 300 on the airflow is better, and when 0≤h/H≤0.1, the effect of the diversion is the best. Under the constant air volume of 20m ³ /min, the noise can be reduced by about 1.5dB(A).

Further, the lower edge of the rear panel 120 of the chassis 100 has a folded edge 121 bent toward the side of the front panel 110 of the chassis 100 , and the air guide 300 is attached to the folded edge 121 .

The folded edge 121 is an inherent structure produced when the chassis 100 is manufactured, and is a structure that must appear during processing. When h≈0, the lowest point of the air guide 300 is at the same height as the bottom opening of the case 100 , and the air guide 300 is close to the folded edge 121 of the rear panel 120 of the case 100 , so that the flow state is further improved. Because if there is a certain distance between the folded edge 121 and the air guide 300 in the vertical direction, the distance can form a narrow flow channel area, and the air flow passing through the narrow flow channel area will deteriorate the air flow channel to a certain extent, making the air flow turbulent, resulting in noise.

The range hood includes a fume collecting hood, the fume collecting hood is located below the chassis 100, an oil net 430 is arranged on the fume collecting hood, and the oil fume enters the fume collecting hood through the oil net 430, and then flows upward. is sucked into the fan 200.

The fume collecting hood includes an inner cavity 410 and an outer cavity 420 which are arranged up and down and communicated. The inner cavity 410 is in communication with the lower end opening of the chassis 100. From bottom to top, the cross-sectional area of the inner cavity 410 gradually decreases, and the inner The cavity 410 has the function of gathering oil fume, which can improve the speed of the fume entering the cabinet 100 .

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. scope.

Claims (10)

1. A flow guide member, wherein the flow guide member (300) is used for being placed between a fan (200) and an air inlet, a circular air inlet hole (210) is formed in the side surface of the fan (200), the flow guide member (300) is used for guiding air flow flowing in from the air inlet to the side, provided with the air inlet hole (210), of the fan (200), and the flow guide member (300) is bent along the circumferential direction of the air inlet hole (210).

2. The air guide member as claimed in claim 1, wherein the air guide member (300) has two air guide surfaces arranged at an included angle, and the two air guide surfaces are used for dividing the air flow and guiding the air flow to the air inlet holes (210) at the left side and the air inlet holes (210) at the right side of the fan (200).

3. The deflector according to claim 1 or 2, wherein the deflector (300) is curved in an arc shape in the circumferential direction of the air inlet holes (210).

4. The air guide member as set forth in claim 3, wherein the air guide member (300) is curved in a circular arc shape along a circumferential direction of the air inlet holes (210).

5. The air guide member as claimed in claim 1 or 2, wherein the air guide member (300) comprises a first air guide portion (510) and a second air guide portion (520) which are sequentially connected at an included angle along a circumferential direction of the air inlet hole (210).

6. A range hood, characterized in that the range hood comprises a cabinet (100), a fan (200) and the flow guide (300) of any one of claims 1 to 5;

the fan (200) and the flow guide piece (300) are both arranged in the case (100).

7. The range hood according to claim 6, wherein air inlet holes (210) are formed in both sides of the fan (200), the guide member (300) has two guide surfaces arranged at an included angle, and the two guide surfaces are used for dividing air flow and guiding the air flow to the air inlet holes (210) on the left side and the air inlet holes (210) on the right side of the fan (200) respectively;

a gap (600) is arranged between the flow guide piece (300) and the fan (200).

8. The range hood according to claim 6, wherein both ends of the air guide member (300) are respectively connected with the front plate (110) and the rear plate (120) of the cabinet (100).

9. The range hood according to any one of claims 6-8, wherein the distance between the air inlet of the cabinet (100) and the center of the air inlet hole (210) is a first distance H, the distance between the air inlet of the cabinet (100) and the position of the air guide member (300) farthest from the air inlet hole (210) is a second distance H, and the ratio of the second distance to the first distance is in the range of 0 ≤ H/H ≤ 0.35.

10. The range hood according to claim 9, wherein a lower edge of the rear plate (120) of the cabinet (100) has a folded edge (121) folded toward one side of the front plate (110) of the cabinet (100), and the deflector (300) is attached to the folded edge (121).

Images