Air curtain fan assembly of range hood

Abstract

The utility model discloses an air curtain fan assembly of a range hood, which comprises an exhaust fume collecting hood, an air curtain fan assembly, an air outlet fan assembly, an air inlet fan assembly and an air outlet fan assembly, and the exhaust fume collecting hood is internally provided with a cavity which is provided with an air inlet and an air outlet; the fan assembly comprises a fan and a wind scooper, the fan is installed in the cavity, the wind scooper covers the periphery of the fan, the wind scooper is provided with a first flow guide face and a second flow guide face, the first flow guide face extends to the air inlet in an arc shape, and the second flow guide face extends to the air outlet; the first flow guide face is used for guiding airflow to be blown to the second flow guide face, and the second flow guide face is used for guiding the airflow out of the air outlet to form an air curtain at the air outlet. The wind scooper is arranged on the periphery of the fan in a covering mode, so that after airflow is guided in through the air inlet, the airflow can be transited to the air outlet more smoothly due to guiding of the first flow guiding face and the second flow guiding face, resistance generated due to sharp change of the direction is reduced, wind loss is further reduced, wind pressure generated by the fan is improved, and the service life of the fan is prolonged. The strength of the air curtain is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to range hood technical field especially relates to a range hood's air curtain fan assembly. BACKGROUND

[0002] In the existing air curtain range hood, limited by the installation position, the fan assembly in the cavity is far away from the air curtain outlet when working, which leads to the airflow path in the cavity being too long. When the airflow flows from the air inlet to the air outlet, it will continuously overcome the frictional resistance due to the long distance, resulting in reduced wind pressure and large wind loss, which weakens the strength of the air curtain and cannot effectively constrain the oil fume within the effective suction range of the range hood. SUMMARY

[0003] In order to overcome at least one of the defects of the prior art, the utility model provides an air curtain fan assembly of a range hood, which reduces the energy loss of air during flow by providing a wind deflector around the fan, thereby reducing wind loss and indirectly increasing the strength of the air curtain generated by the fan.

[0004] The utility model discloses a technical scheme for solving the problem:

[0005] An air curtain fan assembly of a range hood, comprising:

[0006] A smoke collecting hood is provided with a cavity, and the cavity has an air inlet and an air outlet;

[0007] A fan assembly includes a fan and a wind deflector, the fan is installed in the cavity, the wind deflector is provided around the fan, the wind deflector has a first flow guide surface and a second flow guide surface, the first flow guide surface extends to the air inlet in an arc shape, and the second flow guide surface extends to the air outlet; the first flow guide surface is used for guiding the airflow to the second flow guide surface, and the second flow guide surface is used for guiding the airflow to the air outlet to form an air curtain at the air outlet.

[0008] Further, the cavity has a wind guide cavity section, the fan assembly is installed in the wind guide cavity section, the air inlet is provided on the side of the smoke collecting hood and communicates with the side of the wind guide cavity section; the air outlet is provided at the bottom end of the smoke collecting hood and communicates with the bottom end of the wind guide cavity section; one end of the wind deflector is connected to the top end of the wind guide cavity section, and one end of the wind guide cavity section is connected to the air outlet and connected to the bottom end of the wind guide cavity section.

[0009] Further, the air guide cover comprises a first air guide section and a second air guide section, the first air guide section and the second air guide section are connected through an arc section; the first air guide surface is an arc guide surface arranged on the first air guide section, and the second air guide surface is an inclined surface arranged on the second air guide section.

[0010] Further, the fan assembly further comprises a mounting seat, the mounting seat is mounted in the cavity, the mounting seat comprises two mounting plates, an installation space is formed between the two mounting plates, and the fan is mounted on the two mounting plates and located in the installation space; the two ends of the air guide cover are connected to the two mounting plates and cover the outside of the installation space.

[0011] Further, the air guide cover is used to form the air guide cavity section in the cavity after the mounting seat is mounted in the cavity.

[0012] Further, a partition plate is arranged in the cavity, the partition plate is used to divide the cavity into a cooking fume cavity section and an air guide cavity section, and the air guide cover abuts against the partition plate.

[0013] Further, the fan is a cross-flow fan.

[0014] Further, the side of the air guide cavity section is provided with a plurality of air inlet holes, and the plurality of air inlet holes are distributed at intervals and form the air inlet.

[0015] Further, the smoke collecting bottom is provided with a plurality of air outlet holes, and the plurality of air outlet holes are distributed at intervals and form the air outlet; the air outlet hole is a strip-shaped hole.

[0016] Further, the two sides of the smoke collecting cover are both provided with cavities, the fan assembly is provided with two groups, and the two groups of fan assemblies are one-to-one correspondingly mounted in the two cavities.

[0017] In conclusion, the fan assembly of the air curtain of the cooking fume exhauster has the following technical effects: the fan is mounted in the cavity, the air guide cover is arranged on the outer periphery of the fan, the first air guide surface on the air guide cover extends to the air inlet in an arc shape, the second air guide surface extends to the air outlet after abutting against the first air guide surface, when the air flow is introduced through the air inlet, the air flow can gradually change the direction along the arc surface and flow to the air outlet under the guidance of the second air guide surface, instead of changing the direction suddenly at a right angle or a sharp corner, so that the air flow can be more smoothly and smoothly transitioned to the air outlet, the resistance caused by the sharp change of the direction is reduced, the wind loss is further reduced, the wind pressure generated by the fan is improved, and the air curtain strength is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a structural schematic view of the present application;

[0019] Fig. 2 is a structural sectional view of the present application;

[0020] Fig. 3 is a structural schematic view of the fan assembly in the present application;

[0021] Fig. 4 is a structural schematic view of the air guide cover in the present application.

[0022] In the drawings, the reference signs have the following meanings:

[0023] 10, smoke collecting cover; 11, air inlet; 12, air outlet; 13, cavity; 14, air guide cavity section; 15, partition; 20, fan; 21, air guide cover; 211, first air guide section; 2111, first air guide surface; 212, second air guide section; 2121, second air guide surface; 213, circular arc section; 22, mounting seat; 231, mounting plate; 30, smoke exhaust cover. DETAILED DESCRIPTION

[0024] In order to better understand and implement, the technical solutions in the embodiments of the present application will be clearly and completely described in the following with reference to the drawings in the embodiments of the present application.

[0025] In the description of the present application, it should be explained that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0027] Reference is made to Figs. 1 to 4The utility model discloses a kind of wind curtain fan assemblies of extractor hood, including fume collecting cover 10 and fan assembly, fume collecting cover 10 is equipped with cavity 13, cavity 13 has air inlet 11 and air outlet 12, specific fan assembly includes fan 20 and wind scooper 21, fan 20 is installed in cavity 13, wind scooper 21 is covered in the outer periphery of fan 20, and wind scooper 21 has first guide surface 2111 and second guide surface 2121, first guide surface 2111 is arc-shaped and extended to air inlet 11, second guide surface 2121 is extended to air outlet 12, first guide surface 2111 is used to guide airflow to blow to second guide surface 2121, second guide surface 2121 is used to guide airflow to be guided out of air outlet 12, to form wind curtain at air outlet 12.

[0028] On the basis of above-mentioned structure, when assembling, first guide surface 2111 and second guide surface 2121 are arranged inside wind scooper 21, and first guide surface 2111 and second guide surface 2121 can be two faces of mutual link, to make that the inner wall of wind scooper 21 forms a gradually changing guide structure, since first guide surface 2111 is extended to air inlet 11, to make airflow enter the effective guide area of wind scooper 21 under the guidance of first guide surface 2111, so that the airflow entering has suitable initial direction and speed distribution, and second guide surface 2121 is extended to air outlet 12, so that after the airflow is transitioned to second guide surface 2121 from first guide surface 2111, the airflow adjusted is smoothly guided to air outlet 12, in this way, airflow can be discharged in more concentrated manner, to make the whole airflow flow process in wind scooper 21 more efficient by the synergistic effect of first guide surface 2111 and second guide surface 2121, avoid the detour, collision etc. of airflow in wind scooper 21, reduce unnecessary energy loss, to form more accurately, uniformly and stably wind curtain in front of extractor hood, enhance the blocking effect of wind curtain to oil fume.

[0029] Specifically, since the first flow guide surface 2111 extends in an arc shape to the air inlet 11, the first flow guide surface 2111 in the air deflector 21 is formed in an arc shape, and the second flow guide surface 2121 can be provided in an inclined surface or an arc surface. When the fan 20 is running, the external airflow is sucked from the air inlet 11. At this time, the airflow gradually changes direction along the arc surface under the guidance of the first flow guide surface 2111, and slowly transitions from the first flow guide surface 2111 to the second flow guide surface 2121. Then, the airflow continues to flow along the connected second flow guide surface 2121, further adjusts the direction to the air outlet 12, and flows to the air outlet 12 under the guidance of the second flow guide surface 2121. This gradual guidance is smoother than suddenly changing the direction of the airflow at a right angle or a sharp corner, so that the airflow can be more smoothly transitioned to the air outlet 12, reducing the resistance caused by the sharp change in direction, further reducing the wind loss, improving the wind pressure generated by the fan 20, and improving the wind curtain strength.

[0030] It should be noted that the air outlet 12 in the embodiment is arranged to be in communication with the bottom of the smoke hood 10 and the cavity 13, and the air inlet 11 can be arranged to be in communication with the top or side of the smoke hood 10 and the cavity 13. When assembled, the fan 20 can be mounted inside the cavity 13 through a connecting member or a mounting seat 22, and the upper and lower ends of the air deflector 21 can be connected to the top and bottom of the cavity 13 by connecting members (screws or bolts) or welding, so that the structure is more stable after installation.

[0031] In addition, the fan 20 in the embodiment can be a cross-flow fan, a centrifugal fan, or an axial flow fan.

[0032] As a preferred embodiment, the fan 20 in the embodiment is a cross-flow fan. Compared with other types of fans, the airflow generated by the cross-flow fan flows in a transverse direction, can be uniformly distributed in the entire passage, and makes the wind curtain effect more stable and reliable.

[0033] Further, the cavity 13 has a wind guide cavity section 14, the fan assembly is installed in the wind guide cavity section 14, the air inlet 11 is arranged on the side of the smoke hood 10 and in communication with the side of the wind guide cavity section 14, the air outlet 12 is arranged at the bottom end of the smoke hood 10 and in communication with the bottom end of the wind guide cavity section 14, one end of the air deflector 21 is connected to the top end of the wind guide cavity section 14, and one end of the wind guide cavity section 14 is connected to the air outlet 12 and the bottom end of the wind guide cavity section 14.

[0034] Specifically, since the flow of the air current in the large cavity 13 is relatively complex, it is easily disturbed by various factors, such as irregular shape of the cavity 13, internal obstacles, etc., leading to air current turbulence, affecting the stability and uniformity of the air curtain. Thus, the embodiment sets up an independent air guide cavity 13 in the cavity 13, and the independent air guide cavity section 14 is separated from other parts in the smoke hood 10, avoiding various interference factors that may exist in the large cavity 13, and the occurrence of air curtain fluctuation or unevenness, so that the air current is more likely to flow out of the air outlet 12 according to the predetermined path after entering the air inlet 11, and external interference air current cannot enter, thereby ensuring the stability and uniformity of the air curtain and enhancing the blocking effect of the air curtain on the oil fume.

[0035] More specifically, since the air inlet 11 is set through the side of the smoke hood 10 and the side of the air guide cavity section 14, and the air outlet 12 is set at the bottom end, in this way, after the air current enters the air guide cavity section 14, it can flow downward relatively naturally under the guidance of the gravity and the first guide surface 2111 and the second guide surface 2121 of the air guide hood 21. This flow mode makes the direction change of the air current relatively gentle, reduces turbulence and energy loss caused by sharp turning, helps to form a stable and uniform air curtain, and can better play the function of blocking oil fume, etc.

[0036] Further, the air guide hood 21 includes a first guide section 211 and a second guide section 212, the first guide section 211 and the second guide section 212 are connected through an arc section 213, the first guide surface 2111 is an arc guide surface provided on the first guide section 211, and the second guide surface 2121 is an inclined surface provided on the second guide section 212.

[0037] Specifically, the first guide section 211 and the second guide section 212 are connected through the arc section 213, so that the arc surface first guide surface 2111 and the inclined surface second guide surface 2121 are connected through the arc surface, providing a smooth transition path for the air current. When the air current enters from the air inlet 11 and flows along the first guide surface 2111, since the first guide surface 2111 is an arc surface, the air current can gradually change direction and accelerate on this surface, and the arc section 213 ensures smooth transition of the air current from the first guide surface 2111 to the second guide surface 2121, avoiding sudden change of direction. This smooth transition can effectively reduce the energy loss of the air current at the junction of the guide surfaces, maintain the stability of the air current, and enable the air current to change direction in a more natural way, thereby avoiding turbulence and being conducive to forming a uniform and stable air curtain.

[0038] More specifically, since the second guide surface 2121 extends to the air outlet 12 in the form of an inclined surface, the design of the inclined surface helps to guide the airflow adjusted by the first guide surface 2111 and the circular arc segment 213 to the air outlet 12 at a specific angle and direction and out of the air outlet 12, thereby more effectively forming the air curtain.

[0039] It should be noted that the first guide segment 211 and the second guide segment 212 and the circular arc segment 213 can be connected by welding, or can be integrally formed so that the air deflector 21 is divided into the first guide segment 211 and the second guide segment 212 and the circular arc segment 213.

[0040] Further, the fan assembly further comprises a mounting seat 22, the mounting seat 22 is installed in the cavity 13, the mounting seat 22 comprises two mounting plates, an installation space is formed between the two mounting plates, the fan 20 is installed on the two mounting plates and located in the installation space, and the two ends of the air deflector 21 are connected to the two mounting plates and cover the outside of the installation space.

[0041] Specifically, the fan 20 is installed by setting the mounting seat 22, so that the structure of the fan 20 is stable after installation and is not easy to shake during operation, thereby effectively reducing the noise of the fan 20 during operation; in addition, during assembly, the two mounting plates of the mounting seat 22 can be connected to the inside of the cavity 13 by clamping or inserting, so that the mounting seat 22 can be disassembled at any time, facilitating later maintenance.

[0042] In addition, since the two ends of the air deflector 21 are connected to the two mounting plates to cover the outside of the installation space, the air deflector 21 is directly covered on the outer periphery of the fan 20, so that the fan 20, the mounting seat 22 and the air deflector 21 form a whole mechanism, which is convenient for later unified cleaning or disassembly, and the later maintenance is more convenient.

[0043] More specifically, since the air deflector 21 is connected to the two mounting plates, the mounting seat 22 is installed in the cavity 13, and the air deflector 21 can be spaced from the side of the cavity 13, so that the space between the air deflector 21 and the side of the cavity 13 forms the above-mentioned air guiding cavity segment 14, and the cavity 13 inside can form an independent air guiding cavity segment 14 without setting other structures, and the structure is simpler.

[0044] Further, the cavity 13 further comprises a partition plate 15, the partition plate 15 is used to separate the cavity 13 into a cooking fume cavity segment and the air guiding cavity segment 14, and the air deflector 21 abuts against the partition plate 15.

[0045] On the basis of the structure, the oil fume cavity and the air guide cavity are separated by the partition 15, so that the oil fume cavity and the air guide cavity are separated and have independent air flow paths, and the two do not interfere with each other during operation.

[0046] In addition, since the partition 15 abuts against the outer periphery of the air guide cover 21, the air guide cover 21 is more stable after installation, avoids shaking during use, and reduces noise, and the structure is more practical.

[0047] Further, a plurality of air inlet holes are arranged on the side of the air guide cavity, and the plurality of air inlet holes form the air inlet 11. The plurality of air inlet holes are arranged on the side of the oil fume hood 10, so that the air flow enters the air guide cavity through the plurality of air inlet holes. This helps to distribute the air flow more evenly at the inlet of the air guide cavity, reduces the resistance and turbulence of the air flow in the equipment, and improves the working efficiency of the fan 20 and reduces energy loss.

[0048] More specifically, the bottom of the oil fume hood is provided with a plurality of air outlet holes to form the air outlet 12. The plurality of air outlet holes can make the air blown out more evenly on the plane of the air outlet 12. Uniform air outlet is the key to forming a stable and effective air curtain, which indirectly improves the strength and stability of the air curtain.

[0049] In addition, compared with the circular air outlet hole, the strip-shaped hole can disperse the air flow in a longer linear area, so that the air curtain can achieve more uniform air outlet effect in the length direction. Therefore, when the air flow flows to the plurality of strip-shaped air outlet holes at the bottom end of the oil fume hood 10, the strip-shaped hole can continuously guide the air flow along the edge of the stove or the boundary of the entire cooking area, avoiding the weak area of the local air curtain caused by the interval of the air outlet holes, thereby forming a more continuous and uniform air curtain. Such uniform air curtain can better cover the cooking area and effectively block the spread of oil fume.

[0050] Further, the oil fume hood 10 is provided with two cavities 13 on both sides, and the fan assembly is provided with two groups, and the two groups of fan assemblies are installed in the two cavities 13 one by one.

[0051] Specifically, the two groups of fan assemblies act at the same time, so that the air curtain can be formed on both sides of the cooking area on both sides of the oil fume hood 10. Therefore, the coverage range of the air curtain in the horizontal direction is greatly increased, which can effectively prevent the oil fume from spreading from both sides of the stove.

[0052] The technical means disclosed by the utility model scheme are not limited to the technical means disclosed by the above-mentioned embodiments, and also include technical schemes composed of any combination of the above technical features. It should be noted that, for ordinary skilled persons in the art, without departing from the principles of the utility model, a number of improvements and refinements can be made, and these improvements and refinements are also considered within the protection scope of the utility model.

Claims

1. A range hood air curtain fan assembly, characterized in that, include: A smoke collection hood, wherein the smoke collection hood has a cavity, the cavity having an air inlet and an air outlet; A fan assembly includes a fan and an air guide shroud. The fan is installed in the cavity, and the air guide shroud covers the outer periphery of the fan. The air guide shroud has a first air guide surface and a second air guide surface. The first air guide surface extends in an arc shape to the air inlet, and the second air guide surface extends to the air outlet. The first air guide surface is used to guide the airflow to the second air guide surface, and the second air guide surface is used to guide the airflow out of the air outlet to form an air curtain at the air outlet.

2. The air curtain fan assembly of the range hood as described in claim 1, characterized in that, The cavity contains an air guide section, the fan assembly is installed in the air guide section, the air inlet is located on the side of the smoke hood and communicates with the side of the air guide section; the air outlet is located at the bottom of the smoke hood and communicates with the bottom of the air guide section; one end of the air guide hood is connected to the top of the air guide section, and the other end of the air guide hood is connected to the air outlet and to the bottom of the air guide section.

3. The air curtain fan assembly of the range hood as described in claim 2, characterized in that, The air guide shroud includes a first guide section and a second guide section, which are connected by an arc segment; the first guide surface is an arc guide surface provided on the first guide section, and the second guide surface is an inclined surface provided on the second guide section.

4. The air curtain fan assembly of the range hood as described in claim 3, characterized in that, The fan assembly also includes a mounting base, which is installed in the cavity. The mounting base includes two mounting plates, with a space between the two mounting plates to form an installation space. The fan is installed on the two mounting plates and located in the installation space. The two ends of the air guide shroud are connected to the two mounting plates and cover the outside of the installation space.

5. The air curtain fan assembly of the range hood as described in claim 4, characterized in that, The air guide shroud is used to form the air guide cavity section by spacing it from the side of the cavity after the mounting base is installed on the cavity.

6. The air curtain fan assembly of the range hood as described in claim 5, characterized in that, The cavity is also provided with a partition, which is used to divide the cavity into an oil fume cavity section and an air guide cavity section, and the air guide hood abuts against the partition.

7. The air curtain fan assembly of the range hood as described in any one of claims 1-6, characterized in that, The fan is a cross-flow fan.

8. The air curtain fan assembly of the range hood as described in any one of claims 2-6, characterized in that, The side of the air guide cavity section is provided with multiple air inlets, which are spaced apart and form the air inlet.

9. The air curtain fan assembly of the range hood as described in any one of claims 1-6, characterized in that, The bottom of the smoke collection hood is provided with multiple air outlets, which are spaced apart and form the air outlets; the air outlets are strip-shaped holes.

10. The air curtain fan assembly of the range hood as described in any one of claims 1-6, characterized in that, Both sides of the smoke hood are provided with cavities, and there are two sets of fan assemblies, with each set of fan assemblies installed in one of the two cavities.

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