A range hood

Abstract

The present invention discloses a range hood, comprising a range hood housing and a first fan assembly arranged in the range hood housing, the range hood housing having a smoke inlet, an oil net assembly being arranged at the smoke inlet, and further comprising a swirl generating device and a second fan assembly, the swirl generating device being provided with an air inlet and having a plurality of air outlets for forming a swirl on its side wall, the flow generating device being installed below the oil net assembly, and the air inlet being connected to the exhaust port of the second fan assembly. A range hood of the present invention has a compact structure of the swirl generating device, occupies a small space, and under the joint action of the swirl generating device and the first fan assembly, the oil smoke can be guided to the smoke inlet in the shape of an artificial tornado, thereby effectively controlling the oil smoke path, facilitating all-round smoke collection, and improving the smoking effect.

Description

Technical Field

[0001] The invention relates to the technical field of range hoods, and in particular to a range hood capable of forming a rotating suction effect. Background Art

[0002] The suction process of traditional range hoods can be regarded as a point-sink type. With the increase of the distance from the suction port, the negative pressure of this type of suction will drop sharply, and the oil smoke at a long distance cannot be effectively sucked out. How to reduce the diffusion of oil smoke and improve the suction effect of the range hood has always been a technical problem to be solved in this field.

[0003] The simplest and most direct way currently is to increase the power of the fan. Although this can improve the suction and exhaust effects, the improvement in the smoking effect is not obvious, and it will also cause increased noise and energy consumption.

[0004] In addition, there are some range hoods that can create a tornado smoking effect, such as the application number CN201210396787.9 "A rotary air curtain range hood with oil fume filtering device", which arranges four pipes with small slits under the range hood, and sends out the cyclone through the fan to form a horizontally rotating air curtain, which creates a tornado smoking effect under the suction of the range hood. However, it has major disadvantages such as not compact enough structure, large space occupation, and poor anti-interference ability. Summary of the invention

[0005] The present invention aims to solve at least one of the problems existing in the existing related technologies to a certain extent. To this end, the present invention proposes a range hood with a simple and compact structure, which can form a rotating smoke extraction effect, and effectively solves the technical problem of ineffective suction and exhaust due to the long distance between the smoke inlet and the stove.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A range hood comprises a range hood housing and a first fan assembly arranged in the range hood housing, the range hood housing having a smoke inlet, an oil net assembly being arranged at the smoke inlet, and further comprising a swirl generating device and a second fan assembly, the swirl generating device being provided with an air inlet and having a side wall thereof provided with a plurality of air outlets for forming a swirl, the swirl generating device being installed below the oil net assembly, and the air inlet being connected to the air outlet of the second fan assembly.

[0008] In some embodiments, the swirl generating device comprises a hollow air distribution pipe and an annular shell, the air distribution pipe is arranged in the annular shell, a plurality of air holes are arranged on the side wall of the air distribution pipe and the air inlet is arranged on the top of the air distribution pipe, the air outlet is arranged obliquely on the peripheral side wall of the annular shell, and air can enter the air distribution pipe from the air inlet and be discharged from the air outlet through the air holes.

[0009] In some embodiments, the annular shell is cylindrical or trumpet-shaped, and the air outlet is rotated and tilted from bottom to top along the peripheral wall of the annular shell.

[0010] In some embodiments, the width of the air outlet is 2 to 20 mm.

[0011] In some embodiments, the swirl generating device includes at least two side plates, which are arranged around the air distribution pipe and enclose a peripheral wall of the annular shell. The side plates are provided with the air outlets or the air outlets are formed between adjacent side plates.

[0012] In some embodiments, the side panels are arc-shaped panels, and the number of the side panels is 2 to 20.

[0013] In some embodiments, the gas distribution pipe extends downward along its length direction and abuts against the inner side of the bottom of the annular shell, and the air holes are arranged in rows on the peripheral wall of the gas distribution pipe.

[0014] In some embodiments, a mounting hole is provided at the center of the oil net assembly, and a convex edge extending outward is provided on the top circumference of the annular shell. The upper end of the air distribution pipe passes through the mounting hole and is connected to the second fan assembly arranged in the range hood body through the air inlet. The convex edge abuts against the bottom surface of the oil net assembly and is fixedly connected to the oil net assembly.

[0015] In some embodiments, an opening for passing outside air is provided at the lower end of the side wall of the range hood housing, and a filter is provided at the opening; the second fan assembly is fixed to the inner wall of the range hood housing, and the air outlet of the second fan assembly is connected to the opening.

[0016] In some embodiments, a connecting pipe is further included, and the air outlet of the second fan assembly is connected to the air inlet through the connecting pipe.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] 1. A range hood of the present invention is provided with a swirl generating device for ejecting a swirling airflow, so that the oil smoke is guided to the smoke inlet in an artificial tornado shape under the joint action of the swirl generating device and the first fan assembly, which is conducive to all-round smoke collection and improves the smoke collection effect;

[0019] 2. The swirl generating device of the present invention has a simple and compact structure and occupies a small space. It can not only drive the airflow around it to rotate, but also move the negative pressure of the range hood downward, which is beneficial to reduce the escape of oil smoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of a range hood in an embodiment of the present invention;

[0021] Figure 2 is a partial structural cross-sectional view of a range hood according to an embodiment of the present invention;

[0022] Figure 3 is a partial structural schematic diagram of an oil screen assembly in an embodiment of the present invention;

[0023] Figure 4 is a schematic structural diagram of a swirl generating device in an embodiment of the present invention;

[0024] Figure 5 yes Figure 4 A cross-sectional view of a swirl generating device;

[0025] Figure 6 yes Figure 4 Another cross-sectional view of the swirl generating device. DETAILED DESCRIPTION

[0026] The following examples illustrate the present invention, but the present invention is not limited to these examples. Modifications to the specific embodiments of the present invention or equivalent replacement of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed by the present invention.

[0027] like Figure 1-2 As shown, a range hood of this embodiment includes a range hood housing 1, a first fan assembly 2, an oil net assembly 3, a swirl generating device 4, a second fan assembly 5 and a smoke collecting hood 8. The range hood housing 1 has a smoke inlet, the oil net assembly 3 is arranged at the smoke inlet, and the first fan assembly 2 is arranged inside the range hood housing 1. The swirl generating device 4 is provided with an air inlet 401 and its side wall is provided with a plurality of air outlets 402 for forming a swirl, and the plurality of air outlets 402 can spray out a rotating airflow and drive the airflow around the swirl generating device 4 to rotate. The swirl generating device 4 is vertically arranged below the oil net assembly 3 and its upper end is fixedly connected to the oil net assembly 3, and the air inlet 401 is connected to the exhaust port of the second fan assembly 5. In this embodiment, the first fan assembly 2 is a volute fan, and the second fan assembly 5 is a fan with an air intake port and an exhaust port.

[0028] A range hood of the present embodiment has a swirl generating device 4 with a simple and compact structure and occupies a small space. The swirl generating device 4 can spray out a rotating airflow under the action of the second fan assembly 5, and cooperate with the first fan assembly 2 to guide the oil smoke to the oil net assembly 3 in a tornado shape, thereby forming an artificial tornado-like rotating smoking effect, which is beneficial to shifting the negative pressure of the range hood downward, reducing the escape of oil smoke and achieving a good smoke collection effect.

[0029] Furthermore, an opening for outside air to pass through is provided at the lower end of the side wall of the smoke machine housing 1, and a filter 7 is provided at the opening. The second fan assembly 5 is fixed to the inner side wall of the smoke machine housing 1, and the air inlet of the second fan assembly 5 is connected to the opening, and its air outlet is connected to the air inlet 401 of the swirl generating device 4 through the connecting pipe 6. Thus, the second fan assembly 5 is fixed and connected, and under the action of the filter 7, the wind entering the second fan assembly 5 can be initially filtered to prevent large particles of debris from being sucked into the second fan assembly 5, thereby preventing the swirl generating device 4 from being blocked by large particles of debris and affecting the effect of generating the swirl airflow. In this embodiment, the filter 7 is a grid-shaped filter.

[0030] like Figure 2-3 As shown, a mounting hole 31 is provided at the center of the oil net assembly 3, and the upper end of the swirl generating device 4 passes through the mounting hole 31 and is fixedly connected to the oil net assembly 3, so that the swirl generating device 4 is vertically fixed at the center of the oil net assembly 3. The swirl generating device 4 is used to move the negative pressure of the range hood downward, which is convenient for all-round smoke collection, greatly improving the smoking effect, and effectively solving the technical problem of ineffective suction and exhaust due to the long distance between the smoke inlet and the stove.

[0031] like Figure 4-6 As shown, further, the swirl generating device 4 includes a hollow air distribution pipe 41 and an annular shell 42, the air distribution pipe 41 is arranged in the annular shell 42, a plurality of air holes 411 are arranged on the side wall of the air distribution pipe 41 and an air inlet 401 is arranged on the top thereof, so that the air distribution pipe 41 is connected to the exhaust port of the second fan assembly 5 through the air inlet 401 and the connecting pipe 6. The air outlet 402 is arranged obliquely on the peripheral side wall of the annular shell 42. Thus, air can enter the air distribution pipe 41 from the air inlet 401, and be discharged from the air outlet 402 through the uniform air distribution of the air holes 411, thereby ensuring that the rotating airflow ejected from the air outlet 402 is more uniform, which is conducive to improving the rotating smoking effect.

[0032] Preferably, the air distribution pipe 41 extends downward along its length and abuts against the inner side of the bottom of the annular shell 42, so that the bottom of the air distribution pipe 41 can be omitted, which is conducive to saving manufacturing materials and simplifying the processing steps, thereby achieving the purpose of reducing manufacturing costs. The air holes 411 are arranged in rows on the peripheral wall of the air distribution pipe 41 to more evenly distribute the airflow entering the air distribution pipe 41 from the air inlet 401 in the vertical and circumferential directions.

[0033] Preferably, the annular shell 42 is cylindrical or trumpet-shaped. Specifically, the annular shell 42 is trumpet-shaped so that the swirl generating device 4 is also trumpet-shaped with a large lower end and a small upper end. The air outlet 402 is rotated and tilted from bottom to top along the peripheral wall of the annular shell 42, so that the air outlet 402 is not only tilted from bottom to top toward the inside of the annular shell 42, i.e., the air distribution pipe 41, but also rotates counterclockwise or clockwise, thereby ensuring that the rotating airflow ejected from the air outlet 402 is in the shape of a rotating ascending tornado, and forms a reliable rotating oil suction effect with the cooperation of the first fan assembly 2. In addition, the setting mode of the air outlet 402 rotating and tilting from bottom to top along the side wall of the annular shell 42 is conducive to increasing the air outlet area and enhancing the strength of the swirl gas on the outer surface of the swirl generating device 4. In this embodiment, the air outlet 402 is rotated and ascended counterclockwise to ensure the best rotating oil suction effect.

[0034] More preferably, the width of the air outlet 402 is 2 to 20 mm to ensure that the swirl generating device 4 can spray out a stronger rotating airflow, thereby more effectively driving the airflow around the swirl generating device 4 to rotate, further improving the tornado strength and rotating smoking ability.

[0035] Specifically, the annular shell 42 is composed of at least two side panels 421, a top panel 422 and a bottom panel 423 to facilitate processing and manufacturing. The side panels 421 are arranged around the air distribution pipe 41 and enclose the peripheral wall of the annular shell 42, and an air outlet 402 is formed between adjacent side panels 421. The air outlet 402 of this embodiment is formed by the gap between adjacent side panels 421, so there is no need to set the air outlet 402 on the side panels 421, which is conducive to reducing the processing steps and reducing the manufacturing cost. In other embodiments, the peripheral wall of the annular shell 42 can be enclosed by at least one side panel 421, there is no gap between the side panels 421, and the air outlet 402 is directly rotated and tilted on the side panels 421.

[0036] The top plate 422 is sleeved on the upper end of the air distribution pipe 41 and is tightly connected to the upper end of the side plate 421 to form the top of the annular shell 42, and the bottom plate 423 is arranged at the bottom of the air distribution pipe 41 and is tightly connected to the lower end of the side plate 421 to form the bottom of the annular shell 42, so as to avoid the airflow being discharged from the bottom of the air distribution pipe 41, the connection between the top plate 422 and the side plate 421, and the connection between the bottom plate 423 and the side plate 421, thereby weakening the airflow intensity around the swirl generating device 4, i.e., the annular shell 42.

[0037] Preferably, the side plates 421 are arc-shaped plates, and the number thereof is 2 to 20. The outer diameter of the top plate 422 is less than or equal to the diameter of the mounting hole 31 , and a convex edge 4221 extending outward is provided around the top plate 422 , and the outer diameter of the convex edge 4221 is greater than the diameter of the mounting hole 31 .

[0038] When installing the swirl generating device 4, the end of the air distribution pipe 41 protruding from the top plate 422 passes through the mounting hole 31 from bottom to top, and the air inlet 401 is matched and connected with the connecting pipe 6, and the convex edge 4221 of the top plate 422 abuts against the bottom surface of the oil net assembly 3 and is fixedly connected to the oil net assembly 3. In addition, a plurality of fixing holes 4222 are provided around the convex edge 4221, and a plurality of connecting holes 32 corresponding to the fixing holes 4222 are provided around the mounting hole 31 (see Figure 3 ), so that the swirl generating device 4 can be vertically and firmly connected to the oil net assembly 3 by means of bolts or other connecting parts passing through the fixing holes 4222 in sequence and then cooperating with the connecting holes 32.

[0039] In other embodiments, the side panels 421, the top panel 422 and the bottom panel 423 may also be integrally formed to reduce assembly steps and improve production efficiency.

[0040] It can be seen that the swirl generating device 4 of the present embodiment has a simple and compact structure. The airflow entering the air distribution pipe 41 is evenly discharged from the air outlet 402 after being diverted by the air holes 411 and rotates along the outer surface of the side plate 421, thereby driving the airflow around the swirl generating device 4 to rotate and rise. In conjunction with the suction action of the first fan assembly 2, the oil smoke is reliably guided to the smoke inlet in the shape of an artificial tornado, thereby improving the rotating smoking effect and effectively solving the problem of ineffective suction and exhaust due to the long distance between the smoke inlet and the stove.

[0041] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A range hood, comprising a range hood housing (1) and a first fan assembly (2) arranged in the range hood housing (1), wherein the range hood housing (1) has a smoke inlet, and an oil screen assembly (3) is arranged at the smoke inlet, characterized in that: It also comprises a swirl generating device (4) and a second fan assembly (5), wherein the swirl generating device (4) is provided with an air inlet (401) and its side wall is provided with a plurality of air outlets (402) for forming swirls, the swirl generating device (4) is installed below the oil net assembly (3) and its upper end is fixedly connected to the oil net assembly (3), and the air inlet (401) is connected to the air outlet of the second fan assembly (5); The swirl generating device (4) comprises a hollow air distribution pipe (41) and an annular shell (42); the air distribution pipe (41) is arranged in the annular shell (42); the air inlet (401) is arranged at the top of the air distribution pipe (41); and air holes (411) are arranged in rows on the peripheral wall of the air distribution pipe (41). The annular shell (42) comprises at least two side plates (421), the side plates (421) are arranged around the air distribution pipe (41) and enclose the peripheral wall of the annular shell (42), the side plates (421) are provided with the air outlet (402) or the air outlet (402) is formed between adjacent side plates (421), the air outlet (402) is rotated and tilted from bottom to top along the peripheral wall of the annular shell (42), and air can enter the air distribution pipe (41) from the air inlet (401) and be discharged from the air outlet (402) through the air hole (411).

2. A range hood according to claim 1, characterized in that: The annular housing (42) is cylindrical or trumpet-shaped.

3. The range hood according to claim 1, characterized in that: The width of the air outlet (402) is 2 to 20 mm.

4. The range hood according to claim 1, characterized in that: The side plates (421) are arc-shaped plates, and the number of the side plates (421) is 2 to 20.

5. A range hood according to claim 1 or 4, characterized in that: The annular shell (42) further comprises a top plate (422) and a bottom plate (423); the top plate (422) is sleeved on the upper end of the gas distribution pipe (41) and is tightly connected to the upper end of the side plate (421) to form the top of the annular shell (42); the bottom plate (423) is arranged at the bottom of the gas distribution pipe (41) and is tightly connected to the lower end of the side plate (421) to form the bottom of the annular shell (42).

6. The range hood according to claim 1, characterized in that: The gas distribution pipe (41) extends downward along its length direction and abuts against the inner side of the bottom of the annular shell (42).

7. The range hood according to claim 1, characterized in that: A mounting hole (31) is provided at the center of the oil net assembly (3), and a convex edge (4221) extending outward is provided on the top circumference of the annular shell (42); the upper end of the air distribution pipe (41) passes through the mounting hole (31) and is connected to the second fan assembly (5) arranged in the range hood housing (1) through the air inlet (401); the convex edge (4221) abuts against the bottom surface of the oil net assembly (3) and is fixedly connected to the oil net assembly (3).

8. The range hood according to claim 7, characterized in that: An opening for passing outside air is provided at the lower end of the side wall of the range hood housing (1), and a filter element (7) is provided at the opening; the second fan assembly (5) is fixed to the inner wall of the range hood housing (1), and the air outlet of the second fan assembly (5) is connected to the opening.

9. A range hood according to claim 1, 7 or 8, characterized in that: It also comprises a connecting pipe (6), and the air outlet of the second fan assembly (5) is connected to the air inlet (401) via the connecting pipe (6).

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