Volute structure of range hood

Abstract

A volute structure of a range hood comprises a front plate, a rear plate and a surrounding plate which stretches across the front plate and the rear plate to connect the front plate and the rear plate into a whole, an air inlet is formed in the middle of the end face of the front plate in an inward concave mode, and a motor and a wind wheel are fixedly installed on the rear plate. A plurality of fan blades are uniformly distributed across the circumference between the two bottom plates, and the adjacent fan blades are hollowed to form an air duct; grooves are formed in the outer side edges of the fan blades in a concave mode, and the width of the tops of the grooves is larger than that of the bottoms of the grooves. A plurality of grooves are uniformly distributed along the outer side edges of the fan blades; the fan blades are obliquely bent to be in an arc shape. The utility model has the beneficial effects that airflow vortex is effectively scattered, the resistance of airflow in the wind wheel is reduced, the load of a motor is reduced, and the oil absorption effect of the wind wheel is improved.

Description

Technical Field

[0001] The utility model relates to a volute structure, in particular to a range hood volute structure. Background Art

[0002] For range hoods, the fan inside plays a vital role in the purification and emission of oil smoke. A crossflow fan, also known as a crossflow fan, has a blade-shaped impeller with forward multi-wing blades. When the impeller starts to rotate, the airflow enters the interior from the opening of the impeller and is discharged from another place to form an airflow. It has a simple structure and stable airflow and is often used in range hood fans. Since the flow of airflow in a crossflow fan depends on the arrangement of its impeller, the impellers on the market often adopt a flat design. The flat design is not conducive to the flow of airflow and is prone to produce vortices, thereby increasing the resistance of the impeller and causing problems such as an increase in its noise. Therefore, how to design an impeller with low noise and ideal oil absorption effect has become an urgent problem to be solved. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a range hood volute structure with simple structure, low manufacturing cost, noise reduction and resistance reduction effects, and ideal oil suction effect.

[0004] The utility model aims to achieve the following purpose: a range hood volute structure, comprising a front plate and a rear plate, a cross-board connecting the front plate and the rear plate as a whole, the middle of the front plate end surface is concavely provided with an air inlet, a motor and a wind wheel are fixedly mounted on the rear plate, and the characteristics are: the wind wheel comprises two bottom plates arranged in a circular ring shape, a plurality of fan blades are evenly distributed across the circumference between the two bottom plates, and a hollow arrangement is formed between adjacent fan blades to form an air duct; the outer side of the fan blade is concavely provided with a groove, the top width of the groove is greater than the bottom width; the groove is evenly distributed along the outer side of the fan blade; the fan blade is inclined and bent in an arc shape;

[0005] The front plate and the rear plate have opposite sides that are concave inwardly formed to form a plurality of flow-guiding bosses; and the end surface of the enclosure plate is concave inwardly formed to form a plurality of side flow-guiding bosses.

[0006] The wind wheel is a cross-flow wind wheel.

[0007] The bottom plate is penetrated through the end surface to form a plurality of slots, and the fan blade plug-in cards are placed in the slots.

[0008] The fan blades are welded to the inner side wall of the bottom plate.

[0009] A boss is formed between the groove and another adjacent groove, and the width of the top of the boss is smaller than the width of the bottom.

[0010] The groove and another adjacent groove are transitioned by an arc.

[0011] A mounting seat is inserted and connected in the middle of the wind blade, and a mounting hole is arranged through the middle of the mounting seat. The main shaft of the motor passes through the mounting hole and is connected to the wind wheel.

[0012] The protruding directions of the flow guide boss and the side flow guide boss are arranged toward the interior of the volute.

[0013] The beneficial effects of the utility model are as follows: 1. Simple structure, low manufacturing cost, and improved market competitiveness. 2. Effectively break up the airflow vortex, reduce the resistance of the airflow in the wind wheel, reduce the motor load, and improve its oil absorption effect. 3. The guide boss controls and guides the airflow to a certain extent, reduces the impact between the airflow and the volute, and plays a role in reducing noise and resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the general assembly effect diagram of the utility model.

[0015] Figure 2 This is a structural assembly diagram of the wind wheel, front plate, enclosure plate and rear plate in the utility model.

[0016] Figure 3 It is a structural schematic diagram of the middle enclosure plate of the present utility model.

[0017] Figure 4 It is a structural schematic diagram of the wind wheel in the utility model.

[0018] Figure 5 For the utility model Figure 4 Enlarged view of point A. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below with reference to the accompanying drawings. A range hood volute structure, comprising a front plate 1 and a rear plate 2, a spanning enclosure 3 connecting the front plate 1 and the rear plate 2 as a whole, the front plate 1 having an air inlet 11 in the middle of the end surface thereof, a motor 4 and a wind wheel fixedly mounted on the rear plate 2, characterized in that: the wind wheel comprises two bottom plates 6 arranged in a circular ring shape, a plurality of fan blades 7 are evenly distributed across the circumference between the two bottom plates 6, and a hollow arrangement is formed between adjacent fan blades 7 to form an air duct; a concave groove 8 is formed in the outer side of the fan blade 7, the top width of the groove 8 is greater than the bottom width; a plurality of the grooves 8 are evenly distributed along the outer side of the fan blade 7; the fan blade 7 is tilted and bent in an arc shape;

[0020] The front plate 1 and the rear plate 2 have opposite sides that are concave inwardly formed to form a plurality of flow guide bosses 5 ; the end surface of the enclosure 3 is concave inwardly formed to form a plurality of side flow guide bosses 31 .

[0021] The wind wheel is a cross-flow wind wheel.

[0022] The bottom plate 6 is provided with a plurality of slots through the end surface, and the fan blades 7 are inserted and card-mounted in the slots.

[0023] The fan blades 7 are welded to the inner wall of the bottom plate 6 .

[0024] A boss 9 is formed between the groove 8 and another adjacent groove 8, and the width of the top of the boss 9 is smaller than the width of the bottom.

[0025] The groove 8 and another adjacent groove 8 are transitioned by an arc.

[0026] A mounting seat 51 is inserted and connected in the middle of the fan blade 7, and a mounting hole is set through the middle of the mounting seat 51. The main shaft of the motor 4 passes through the mounting hole and is connected to the wind wheel.

[0027] The protruding directions of the guide boss 5 and the side guide boss 31 are arranged toward the inside of the volute.

[0028] Working principle: A cross-flow impeller is used in the impeller of the range hood, which includes two hollow bottom plates in a circular shape, and a number of fan blades are evenly distributed across the circumference of the middle of the two bottom plates. The adjacent fan blades are hollowed out to form an air duct for air circulation.

[0029] It should be noted that in order to improve the efficiency of the airflow, a number of grooves are linearly distributed along the outer edge of the fan blade. The top width of the groove is greater than the bottom width. The groove is used to effectively break up the generated airflow vortex, thereby reducing the turbulence of the air flow and reducing the resistance encountered by the airflow in the cross-flow fan. While reducing noise, it also makes the airflow flow smoother and more unobstructed.

[0030] Furthermore, a boss is formed on the raised fan blade between adjacent grooves, and the top width of the boss is smaller than the bottom width thereof. The mutual cooperation between the boss and the groove can significantly reduce the flow resistance of the fan blade, thereby improving the overall oil suction efficiency of the range hood and reducing the load on the motor.

[0031] Furthermore, the grooves and the bosses form a relatively stepped serrated shape, and the airflow increases a certain amount of air output when in contact with the serrated grooves and bosses. The range hood has a stronger suction force, thereby improving the range hood's ability to remove smoke and grease.

[0032] In the above-mentioned fan blades, they can be installed by opening a slot at the bottom to insert the fan blades, or they can be connected to the base plate by direct welding or the like. Various types of installation methods are suitable for installation of various types of range hoods and have strong flexibility.

[0033] On the side opposite to the front plate and the rear plate of the volute, a number of guide bosses are provided from the main body toward the inside of the volute. Similarly, on the end face of the enclosure, a number of side guide bosses are provided from the main body toward the inside of the volute, so as to guide the airflow to a certain extent, and the flow direction of the airflow in the air duct is better controlled and planned, thereby effectively reducing the impact of the airflow and the volute body, thereby achieving the purpose of reducing noise and resistance.

[0034] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A range hood volute structure, comprising a front plate (1) and a rear plate (2), a spanning plate (3) connecting the front plate (1) and the rear plate (2) as a whole, an air inlet (11) being provided in a concave shape in the middle of the end surface of the front plate (1), a motor (4) and a wind wheel being fixedly mounted on the rear plate (2), characterized in that: The wind wheel comprises two bottom plates (6) arranged in a circular ring shape, a plurality of wind blades (7) are evenly distributed across the circumference between the two bottom plates (6), and adjacent wind blades (7) are hollowed out to form an air duct; the outer edges of the wind blades (7) are concave with grooves (8), and the width of the top of the grooves (8) is greater than the width of the bottom; a plurality of the grooves (8) are evenly distributed along the outer edges of the wind blades (7); the wind blades (7) are inclined and bent to form an arc shape; The front plate (1) and the rear plate (2) have opposite sides whose bodies are concave to form a plurality of flow guide bosses (5); and the end surface of the enclosure plate (3) is concave to form a plurality of side flow guide bosses (31).

2. The range hood volute structure according to claim 1, characterized in that: The wind wheel is a cross-flow wind wheel.

3. The range hood volute structure according to claim 1, characterized in that: The bottom plate (6) is provided with a plurality of slots through the end surface, and the fan blades (7) are inserted into the slots.

4. The range hood volute structure according to claim 1, characterized in that: The fan blades (7) are welded to the inner wall of the bottom plate (6).

5. The range hood volute structure according to claim 1, characterized in that: A boss (9) is formed between the groove (8) and another adjacent groove (8), and the width of the top of the boss (9) is smaller than the width of the bottom.

6. The range hood volute structure according to claim 1, characterized in that: The groove (8) and another adjacent groove (8) are transitioned by an arc.

7. The range hood volute structure according to claim 1, characterized in that: The middle of the fan blade (7) is connected with a mounting seat (51) through the middle, and a mounting hole is provided through the middle of the mounting seat (51), and the main shaft of the motor (4) passes through the mounting hole and is connected to the fan wheel.

8. The range hood volute structure according to claim 1, characterized in that: The protrusion directions of the flow guide boss (5) and the side flow guide boss (31) are arranged toward the interior of the volute.

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