CN111981526A - Fume exhaust fan - Google Patents

Abstract

The invention discloses a range hood, which comprises a fume collecting hood, a first air suction opening arranged at the top of the inner side of the fume collecting hood, a box body arranged on the fume collecting hood and a first air outlet arranged on the box body, wherein an air suction assembly and an air blowing assembly which coaxially rotate are arranged in the box body, the middle part of the inner side of the fume collecting hood is provided with a lug which divides the inner side of the fume collecting hood into two areas, the front surface of the lug is a plane which is inclined downwards, a reducing arc surface is respectively arranged between the two sides of the plane and the front surface of the inner side of the smoke collecting hood, the reducing arc surface is concave, a plurality of exhaust holes are vertically arranged on the plane, the air outlet of the air suction component is communicated with the first air outlet, the air inlet of the air blowing component is communicated with the outside, and a ventilating pipeline is communicated between the air outlet of the air blowing component and the exhaust hole.

Description

a range hood

technical field

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

Background technique

Range hoods are the main means of cooking fumes in kitchens. How to improve the suction efficiency of range hoods has always been an important part of the design and research of range hoods. When the traditional range hood inhales, its inhalation range is a hemispherical area, and the gas in all directions is inhaled indiscriminately. In this inhalation method, the air velocity at the suction port position is relatively large, and the air velocity at the position far from the suction port will decrease rapidly as the distance from the suction port increases. Therefore, within a short distance below the suction port, the upward velocity of the air has become very small, so that the upward suction force is insufficient, and it is very susceptible to interference from external factors, such as people walking around, fans Or the influence of factors that can disturb the airflow, such as air-conditioning operation, so that the fume or pollutants escape with the flow of the disturbed airflow, resulting in poor smoke collection and smoking effect of the range hood.

SUMMARY OF THE INVENTION

In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to prevent the escape of oil fume or pollutants due to external airflow disturbance, and to improve the smoke collecting and smoking effect of the range hood.

A range hood includes a smoke collecting hood, a first air suction port arranged on the inner top of the smoke collecting hood, a box body arranged on the smoke collecting hood, and a first air outlet arranged on the box body, the box body There are coaxially rotating suction components and blowing components inside, and a convex block dividing the inner side of the smoke collecting hood into two areas is arranged in the middle of the inner side of the fume collecting hood, and the front side of the convex block is inclined downward. A plane, a variable diameter arc surface is provided between the two sides of the plane and the inner front face of the fume collecting hood, the variable diameter arc surface is concave, and several exhausts are vertically arranged on the plane The air outlet of the air suction assembly is communicated with the first air outlet, the air inlet is communicated with the first air suction port, the air inlet of the blower assembly is communicated with the outside, and the air outlet is communicated with the exhaust hole. Connected with ventilation ducts.

Further, the air suction assembly includes a first volute and a first fan disposed in the first volute, the blowing assembly includes a second volute and a second fan disposed in the second volute, the The first volute and the second volute are arranged side by side, the first fan and the second fan are coaxially driven by a double-shaft extension motor, and the air inlet of the first volute is communicated with the first air suction port, which is The air outlet is communicated with the first air outlet, the box body is provided with a second air inlet, the air inlet of the second volute is communicated with the second air inlet, and the air outlet passes through the ventilation duct communicated with the vent hole.

Further, one end of the variable diameter arc surface is tangent to the inner front surface of the fume collecting hood, and the other end of the variable diameter arc surface is tangent to the front direction of the convex block.

Further, any horizontal section of the variable diameter arc surface is a quarter arc.

Further, the arc diameter of the variable diameter arc surface gradually increases from bottom to top.

Further, the exhaust holes are elongated holes or polygonal holes or star-shaped holes or special-shaped holes.

Preferably, the distance between the vent hole and the edge of the plane is less than 20mm.

Preferably, the first volute and the second volute are integrally provided.

Embodiment 1, the ventilation duct is formed by connecting multiple sections of hard pipes.

In the second embodiment, the ventilation duct is composed of a hose and an adapter.

Compared with the prior art, the present invention at least includes the following beneficial effects:

When the present invention is in operation, the double-shaft extension motor is started, thereby driving the air suction assembly and the blowing assembly to work, wherein the air suction assembly sucks the outside air from the first air suction port and discharges it from the first air outlet, and the blowing assembly draws the outside air from the first air outlet. The second suction port is inhaled, and the gas flows through the ventilation duct and is discharged from the exhaust hole. Due to the viscous effect of the gas, the high-speed airflow discharged from the exhaust hole will drive the surrounding gas flow. Due to the existence of the arc surface, the gas will form a swirling flow, which cooperates with the upward suction of the suction component to form a spiral upward airflow, which can be used in Before the oil fume diffuses, a swirling suction and gathering effect is formed, preventing the fume from spreading and escaping, and achieving the effect of efficient fume collection and smoking.

Description of drawings

Fig. 1 is the three-dimensional schematic diagram of a kind of range hood of the present invention;

Fig. 2 is one of the exploded three-dimensional schematic diagrams of a range hood of the present invention;

Fig. 3 is the second exploded perspective view of a range hood of the present invention.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present invention, 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 Embodiments are part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work shall fall within the scope of the technical solutions claimed in the present invention.

As shown in Figures 1-3, a range hood includes a fume collecting hood 1, a first air suction port 10 arranged on the inner top of the fume collecting hood 1, a box body 2 arranged on the fume collecting hood 1, and a The first air outlet 20 on the box body 2 is provided with a coaxially rotating suction component 21 and a blower component 22. The inner side is divided into two areas of the convex block 11, the front of the convex block 11 is a downwardly inclined plane 12, the two sides of the plane 12 and the inner front of the fume collecting hood 1 are respectively provided with a variable diameter arc surface 13. The variable diameter arc surface 13 is in a concave shape, and a plurality of exhaust holes 14 are vertically arranged on the plane 12, and the exhaust holes 14 are arranged in the tangential direction toward the variable diameter arc surface 13. , through the air viscous effect, the air in the fume collecting hood is driven to flow along the variable diameter arc surface 13 to form a swirling flow. An air suction port 10 is communicated with, the air inlet of the blower assembly 22 is communicated with the outside, and a ventilation duct 15 is communicated between the air outlet and the exhaust hole 14. The air suction assembly 21 includes a first volute 210 and The first fan 211 disposed in the first volute 210, the blowing assembly 22 includes the second volute 220 and the second fan 221 disposed in the second volute 220, the first volute 210 and the second fan 221 The volutes 220 are arranged side by side, the first fan 211 and the second fan 221 are coaxially driven by the double shaft extension motor 23, the air inlet of the first volute 210 is communicated with the first air suction port 10, and the outlet The air outlet is communicated with the first air outlet 20, a second air inlet 16 is provided on the box body 2, the air inlet of the second volute 220 is communicated with the second air inlet 16, and its outlet The air outlet is communicated with the exhaust hole 14 through the ventilation duct 15. During operation, the double-shaft extension motor 23 is activated, thereby driving the air suction assembly 21 and the blowing assembly 22 to work. 10 is inhaled and discharged from the first air outlet 20 , the blowing assembly 22 inhales the outside air from the second air suction port 16 , and the air flows through the ventilation duct 15 and is discharged from the exhaust hole 14 . Due to the viscous effect of the gas, the high-speed airflow discharged from the exhaust hole 14 will drive the surrounding gas to flow. Due to the existence of the variable diameter arc surface 13, the gas will form a swirling flow, which cooperates with the upward suction of the suction component 21 to form a spiral upward The airflow can form a swirling and gathering effect before the oil fume diffuses, preventing the fume from spreading and escaping, and achieving the effect of efficient fume gathering and smoking. Airflow disturbance.

One end of the variable diameter circular arc surface 13 in the present invention is tangent to the inner front of the fume collecting hood 1, and the other end of the variable diameter circular arc surface 13 is tangent to the front direction of the convex block 11, so that the airflow follows the variable diameter circle. When the arc surface 13 moves, it is easier to form a swirl.

Any horizontal section of the variable diameter arc surface 13 in the present invention is a quarter arc, which makes it easier for the airflow to form a swirling flow when moving along the variable diameter arc surface 13 .

The diameter of the arc of the variable-diameter arc surface 13 of the present invention gradually increases from bottom to top, and the diameter of the arc surface gradually increases from bottom to top, so that the airflow is more likely to form a swirl, and the method of forming a tornado improves the smoking efficiency and improves the swirl flow. smoke effect.

The exhaust hole 14 in the present invention is an elongated hole, a polygonal hole, a star-shaped hole or a special-shaped hole, and the function of the exhaust hole 14 is to discharge air.

According to the present invention, the distance between the exhaust hole 14 and the edge of the plane 12 is less than 20 mm, which is the optimum distance between the exhaust hole 14 and the edge of the plane 12 .

The first volute 210 and the second volute 220 according to the present invention are integrally arranged, which is more convenient to assemble and improves the installation efficiency.

The ventilation duct 15 of the present invention is formed by connecting multiple sections of hard pipes, which can improve durability and prevent deformation.

The ventilation duct 15 of the present invention is composed of a hose and an adapter, which can improve durability and save space.

The above-mentioned specific embodiments describe in detail the technical solutions and beneficial effects of the present invention. It should be understood that the above-mentioned embodiments are only the most preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, additions and equivalent substitutions made within the scope shall be included within the protection scope of the present invention.

Claims (10)

1. The utility model provides a range hood, includes collection petticoat pipe (1), sets up first air outlet (10) at the inboard top of collection petticoat pipe (1), sets up box (2) on collection petticoat pipe (1) and sets up first air outlet (20) on box (2), its characterized in that: an air suction component (21) and an air blowing component (22) which rotate coaxially are arranged in the box body (2), the middle part of the inner side of the fume collecting hood (1) is provided with a convex block (11) which divides the inner side of the fume collecting hood (1) into two areas, the front surface of the convex block (11) is a plane (12) which is inclined downwards, variable diameter circular arc surfaces (13) are respectively arranged between the two sides of the plane (12) and the front surface of the inner side of the fume collecting hood (1), the variable diameter circular arc surfaces (13) are concave inwards, a plurality of exhaust holes (14) are vertically arranged on the plane (12), the air outlet of the air suction component (21) is communicated with the first air outlet (20), the air inlet of the air blowing component (22) is communicated with the outside, a ventilating duct (15) is communicated between the air outlet and the exhaust hole (14).

2. A range hood according to claim 1, wherein: air suction assembly (21) includes first spiral case (210) and first fan (211) of setting in first spiral case (210), air suction assembly (22) includes second spiral case (220) and second fan (221) of setting in second spiral case (220), first spiral case (210) and second spiral case (220) set up side by side, motor (23) coaxial drive is stretched through the biax in first fan (211) and second fan (221), the air intake of first spiral case (210) with first air intake (10) are linked together, its air outlet with first air outlet (20) are linked together be equipped with second inlet scoop (16) on box (2), the air intake of second spiral case (220) with second inlet scoop (16) are linked together, its air outlet through air pipe (15) with exhaust hole (14) are linked together.

3. The range hood of claim 1, wherein: one end of the reducing arc surface (13) is tangent to the front side of the inner side of the smoke collecting hood (1), and the other end of the reducing arc surface (13) is tangent to the front side direction of the bump (11).

4. The range hood of claim 1, wherein: any horizontal section of the reducing arc surface (13) is a quarter arc.

5. The range hood according to any one of claims 1 to 4, wherein: the diameter of the variable diameter arc surface (13) is gradually increased from bottom to top.

6. The range hood according to any one of claims 1 to 4, wherein: the exhaust holes (14) are long holes, polygonal holes, star-shaped holes or special-shaped holes.

7. The range hood of claim 6, wherein: the distance between the vent hole (14) and the edge of the plane (12) is less than 20 mm.

8. The range hood according to any one of claims 1 to 4 or 7, wherein: the first volute (210) and the second volute (220) are integrally arranged.

9. The range hood according to any one of claims 1 to 4 or 7, wherein: the ventilation pipeline (15) is formed by connecting a plurality of sections of hard pipes.

10. The range hood according to any one of claims 1 to 4 or 7, wherein: the ventilation pipeline (15) is composed of a hose and an adapter.

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