A range hood

Abstract

The present invention discloses a range hood, comprising a smoke hood, a first air suction port arranged at the top inner side of the smoke hood, a box body arranged on the smoke hood and a first air outlet arranged on the box body, wherein a coaxially rotating suction component and a blowing component are arranged in the box body, a protrusion is arranged in the middle inner side of the smoke hood to divide the inner side of the smoke hood into two areas, the front side of the protrusion is a downwardly inclined plane, and both sides of the plane are respectively provided with variable diameter arc surfaces between the inner side front side of the smoke hood, the variable diameter arc surfaces are concave, and a plurality of exhaust holes are vertically arranged on the plane, the air outlet of the suction component is connected with the first air outlet, the air inlet of the suction component is connected with the first air suction port, the air inlet of the blowing component is connected with the outside, and a ventilation duct is provided between the air outlet and the exhaust hole.

Description

Technical Field

[0001] The invention relates to the field of kitchen appliances, and in particular to a range hood. Background Art

[0002] Range hoods are the main means of collecting oil fumes in kitchens. How to improve the suction efficiency of range hoods has always been an important part of range hood design and research. When traditional range hoods are sucking air, their suction range is a hemispherical area, and gases from all directions are sucked indiscriminately. In this way of suction, the air flow rate at the air inlet is relatively large, while the air flow rate far away from the air inlet will drop rapidly as the distance from the air inlet increases. Therefore, within a very short distance below the air inlet, the upward speed of the air has become very small, making the upward suction force insufficient and easily affected by external factors, such as people walking, fans or air conditioning running, etc., which can disturb the airflow, so that the oil fume or pollutants escape with the flow of the disturbed airflow, resulting in poor smoke collection and suction effects of the range hood. Summary of the invention

[0003] In view of the defects of the above-mentioned prior art, the technical problem to be solved by the present invention is to prevent the escape of oil smoke or pollutants due to external air flow disturbance, and to improve the smoke collection and extraction effect of the range hood.

[0004] A range hood comprises a smoke hood, a first air suction port arranged at the top inner side of the smoke hood, a box body arranged on the smoke hood and a first air outlet arranged on the box body, wherein a coaxially rotating suction assembly and a blowing assembly are arranged in the box body, a protrusion is arranged in the middle inner side of the smoke hood to divide the inner side of the smoke hood into two areas, the front side of the protrusion is a downwardly inclined plane, and variable diameter arc surfaces are arranged between the two sides of the plane and the inner front side of the smoke hood respectively, and the variable diameter arc surfaces are concave, and a plurality of exhaust holes are vertically arranged on the plane, the air outlet of the suction assembly is connected with the first air outlet, and the air inlet thereof is connected with the first suction port, the air inlet of the blowing assembly is connected with the outside, and a ventilation duct is arranged between the air outlet and the exhaust hole.

[0005] Furthermore, the air suction component includes a first volute and a first fan arranged in the first volute, and the air blowing component includes a second volute and a second fan arranged in the second volute, the first volute and the second volute are arranged in parallel, the first fan and the second fan are coaxially driven by a double-axis extension motor, the air inlet of the first volute is connected to the first air suction port, and the air outlet thereof is connected to the first air outlet, a second air suction port is provided on the box body, the air inlet of the second volute is connected to the second air suction port, and the air outlet thereof is connected to the exhaust hole through a ventilation duct.

[0006] Furthermore, one end of the variable diameter arc surface is tangent to the inner front side of the smoke collecting hood, and the other end of the variable diameter arc surface is tangent to the front direction of the protrusion.

[0007] Furthermore, any horizontal cross section of the variable diameter arc surface is a quarter arc.

[0008] Furthermore, the diameter of the arc of the variable diameter arc surface gradually increases from bottom to top.

[0009] Furthermore, the exhaust hole is a polygonal hole.

[0010] Preferably, the distance between the exhaust hole and the edge of the plane is less than 20 mm.

[0011] Preferably, the first volute and the second volute are integrally arranged.

[0012] In the first embodiment, the ventilation duct is composed of multiple sections of rigid pipes.

[0013] In the second embodiment, the ventilation duct is composed of a hose and an adapter.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] When the present invention is working, the double-axle extension motor is started, thereby driving the suction component and the blowing component to work, wherein the suction component sucks in external gas from the first suction port and discharges it from the first air outlet, and the blowing component sucks in external gas from the second suction port, and the gas flows through the ventilation duct and is discharged from the exhaust hole. Due to the viscosity effect of the gas, the high-speed airflow discharged from the exhaust hole will drive the flow of the surrounding gas, and due to the existence of the arc surface, the gas will form a swirl, and with the upward suction of the suction component, a spiral upward airflow is formed, which can form a swirl suction and gathering effect before the oil fume gas diffuses, preventing the oil fume from diffusing and escaping, achieving the effect of efficient smoke gathering and smoking, and the oil fume can be cut into different areas by the swirl, preventing the oil fume from diffusing and preventing external airflow interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of a range hood of the present invention;

[0017] Figure 2 This is one of the exploded three-dimensional schematic diagrams of a range hood of the present invention;

[0018] Figure 3 This is the second exploded stereoscopic schematic diagram of a range hood according to the present invention. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of the technical solution for protection of the present invention.

[0020] like Figure 1-3As shown, a range hood comprises a smoke hood 1, a first air suction port 10 arranged at the top of the inner side of the smoke hood 1, a box body 2 arranged on the smoke hood 1, and a first air outlet 20 arranged on the box body 2, wherein a coaxially rotating air suction component 21 and a blowing component 22 are arranged in the box body 2, a convex block 11 is arranged at the middle of the inner side of the smoke hood 1 to divide the inner side of the smoke hood 1 into two areas, the front side of the convex block 11 is a downwardly inclined plane 12, and both sides of the plane 12 are respectively provided with a reducing arc between the inner front side of the smoke hood 1 The surface 13 is concave, and a plurality of exhaust holes 14 are arranged vertically on the plane 12. The exhaust holes 14 are arranged in the tangent direction toward the variable diameter arc surface 13. Through the air viscosity effect, the air in the smoke hood is driven to flow along the variable diameter arc surface 13 to form a vortex. The air outlet of the suction component 21 is connected to the first air outlet 20, and its air inlet is connected to the first suction port 10. The air inlet of the blowing component 22 is connected to the outside, and a ventilation hole 14 is provided between the air outlet and the exhaust hole 14. The duct 15, the air suction component 21 includes a first volute 210 and a first fan 211 disposed in the first volute 210, the air blowing component 22 includes a second volute 220 and a second fan 221 disposed in the second volute 220, the first volute 210 and the second volute 220 are arranged in parallel, the first fan 211 and the second fan 221 are coaxially driven by a double-axle extension motor 23, the air inlet of the first volute 210 is connected to the first air suction port 10, and its air outlet is connected to the first air outlet 20 The housing 2 is provided with a second air suction port 16, the air inlet of the second volute 220 is connected to the second air suction port 16, and the air outlet thereof is connected to the exhaust hole 14 through the ventilation duct 15. When working, the double-shaft extension motor 23 is started, thereby driving the air suction component 21 and the air blowing component 22 to work, wherein the air suction component 21 sucks in the outside air from the first air suction port 10 and discharges it from the first air outlet 20, and the air blowing component 22 sucks in the outside air from the second air suction port 16, and the gas flows through the ventilation duct 15 and is discharged from the exhaust hole 14. Due to the viscosity effect of the gas, the high-speed airflow discharged from the exhaust hole 14 will drive the flow of the surrounding gas, and due to the existence of the variable diameter arc surface 13, the gas will form a swirl, and cooperate with the upward suction of the air suction component 21 to form a spiral upward airflow, which can form a swirl suction and gathering effect before the oil smoke gas diffuses, prevent the oil smoke from diffusing and escaping, and achieve the effect of efficient smoke gathering and smoking, and the oil smoke can be cut into different areas by the swirl, preventing the oil smoke from diffusing and preventing external airflow interference.

[0021] One end of the variable diameter arc surface 13 of the present invention is tangent to the inner front side of the smoke hood 1 , and the other end of the variable diameter arc surface 13 is tangent to the front direction of the protrusion 11 , so that the airflow is more likely to form a swirl when moving along the variable diameter arc surface 13 .

[0022] Any horizontal cross section of the variable diameter arc surface 13 of the present invention is a quarter arc, so that the airflow can more easily form a swirl when moving along the variable diameter arc surface 13 .

[0023] The diameter 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, which makes it easier for the airflow to form a swirl, and the formation of a tornado improves the smoking efficiency and the smoke-collecting effect.

[0024] The exhaust hole 14 of the present invention is a polygonal hole, which can be a long hole, a star-shaped hole or a special-shaped hole. The exhaust hole 14 functions to vent air.

[0025] The distance between the exhaust hole 14 and the edge of the plane 12 of the present invention is less than 20 mm, which is the optimal distance between the exhaust hole 14 and the edge of the plane 12 .

[0026] The first volute 210 and the second volute 220 of the present invention are integrally arranged, which is more convenient for assembly and improves installation efficiency.

[0027] The ventilation duct 15 of the present invention is composed of multiple sections of hard pipes, which can improve durability and prevent deformation.

[0028] The ventilation duct 15 of the present invention is composed of a hose and an adapter, which can improve durability and save space.

[0029] The specific implementation methods described above provide a detailed description of the technical solutions and beneficial effects of the present invention. It should be understood that the above is only the most preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, supplements and equivalent substitutions made within the scope of the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A range hood, comprising a fume hood (1), a first air inlet (10) arranged at the top of the inner side of the fume hood (1), a housing (2) arranged on the fume hood (1), and a first air outlet (20) arranged on the housing (2), characterized in that: A convex block (11) is provided in the middle of the inner side of the smoke hood (1) to divide the inner side of the smoke hood (1) into two areas, the front side of the convex block (11) is a plane (12) inclined downward, and a variable diameter arc surface (13) is provided between the two sides of the plane (12) and the inner front side of the smoke hood (1), the variable diameter arc surface (13) is concave, and a plurality of exhaust holes (14) are arranged vertically on the plane (12), and the exhaust holes (14) are arranged in a tangent direction toward the variable diameter arc surface (13); The box body (2) is provided with a coaxially rotating air suction component (21) and an air blowing component (22); the air outlet of the air suction component (21) is connected to the first air outlet (20), and the air inlet of the air suction component (21) is connected to the first air suction port (10); the air inlet of the air blowing component (22) is connected to the outside, and a ventilation duct (15) is provided between the air outlet and the exhaust hole (14).

2. A range hood according to claim 1, characterized in that: The air suction component (21) comprises a first volute (210) and a first fan (211) arranged in the first volute (210); the air blowing component (22) comprises a second volute (220) and a second fan (221) arranged in the second volute (220); the first volute (210) and the second volute (220) are arranged in parallel; the first fan (211) and the second fan (221) are coaxially driven by a double-axle extension motor (23); the air inlet of the first volute (210) is connected to the first air suction port (10), and the air outlet thereof is connected to the first air outlet (20); a second air suction port (16) is provided on the housing (2); the air inlet of the second volute (220) is connected to the second air suction port (16), and the air outlet thereof is connected to the exhaust hole (14) through a ventilation duct (15).

3. The range hood according to claim 1, characterized in that: One end of the reduced-diameter arc surface (13) is tangent to the inner front side of the smoke collecting hood (1), and the other end of the reduced-diameter arc surface (13) is tangent to the front direction of the protrusion (11).

4. The range hood according to claim 1, characterized in that: Any horizontal cross section of the variable diameter arc surface (13) is a quarter arc.

5. A range hood according to any one of claims 1 to 4, characterized in that: The arc diameter of the variable diameter arc surface (13) gradually increases from bottom to top.

6. A range hood according to any one of claims 1 to 4, characterized in that: The exhaust hole (14) is a polygonal hole.

7. A range hood according to claim 6, characterized in that: The distance between the exhaust hole (14) and the edge of the plane (12) is less than 20 mm.

8. The range hood according to claim 2, characterized in that: The first volute (210) and the second volute (220) are integrally arranged.

9. A range hood according to any one of claims 1 to 4 or 7, characterized in that: The ventilation duct (15) is composed of multiple sections of hard pipes connected together.

10. A range hood according to any one of claims 1 to 4 or 7, characterized in that: The ventilation duct (15) is composed of a hose and an adapter.

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