Smoke suction assembly for range hood

Abstract

A smoke suction assembly for a range hood comprises a front shell and a rear shell, and the butt joint faces of the front shell and the rear shell are buckled with each other and jointly define a volute. A smoke inlet is formed in the middle of the front shell, and an air guide ring covers the smoke inlet; a mounting hole is formed in the middle of the rear shell, the motor is mounted in the mounting hole through a motor support, a wind wheel is arranged in the volute and connected with the motor, the motor drives the wind wheel to rotate in the volute, and oil smoke is sucked from the smoke inlet and discharged from a smoke outlet in the top of the volute. The volute has the advantages that the front shell body and the rear shell body are buckled through the butt joint faces to form the volute, and the complex structure that a coaming and two end plates need to be welded and assembled in the prior art is avoided. Compared with the three-piece design in the prior art, the volute assembly can be completed only through two accessories, and the assembly process is greatly simplified.

Description

Technical Field

[0001] This utility model relates to a range hood accessory, specifically a smoke extraction component for a range hood. Background Technology

[0002] As an indispensable appliance in the kitchen, the main function of a range hood is to quickly absorb and expel cooking fumes generated during cooking through a highly efficient suction and exhaust system, preventing the spread of fumes and pollution of the kitchen air, thereby improving the user's cooking experience. The performance of a range hood mainly depends on its internal suction components, including the volute, impeller, and motor. Among these, the volute, as the main channel for airflow, plays a crucial role in the efficiency of fume absorption and emission. The impeller, as a key component in generating airflow, also directly affects the overall performance of the range hood.

[0003] In existing technology, the volute structure of a range hood is usually welded together from a surrounding plate and end plates located at both ends of the surrounding plate. This traditional volute design has the following main problems:

[0004] The large number of parts and complex assembly of the volute require the use of a retaining plate and two end plates at either end of the retaining plate to form a complete volute cavity. Because this structure requires the assembly of three independent components, multiple parts need to be aligned and positioned during production. This complex assembly process with numerous steps significantly reduces production efficiency. Furthermore, the increased number of parts directly raises manufacturing costs.

[0005] The large amount of welding increases the difficulty and instability of the process: the connection between the casing and the two end plates requires welding. During welding, not only is precise positioning of the welding points necessary, but welding errors can easily affect the overall sealing and structural strength of the casing. Furthermore, multi-point welding increases process time and operational difficulty, further reducing production efficiency and increasing the complexity of quality control. In addition, weld points may loosen or crack due to high temperatures or vibrations during long-term use, thus affecting the service life and performance stability of the casing.

[0006] 3. Low material utilization and significant waste: During the manufacturing process, the side panels and end panels typically need to be cut and processed separately before assembly and welding. This inevitably generates a significant amount of waste, especially during the panel forming and welding processes, resulting in low material utilization. Furthermore, the extensive welding processes consume additional energy, hindering efforts to reduce production costs and improve environmental performance.

[0007] The overall structure lacks airtightness, which affects airflow efficiency.

[0008] 4. Furthermore, the blades are straight-lined, resulting in a small air contact area. Although the manufacturing process is relatively simple, the limited air contact area due to the blade shape prevents effective improvement in airflow efficiency during smoke extraction, thus reducing the impeller's power performance and smoke absorption efficiency. Therefore, further improvements are necessary. Utility Model Content

[0009] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a range hood smoke extraction component that is simple in structure, easy to use, and can effectively improve the performance of the smoke extraction component of a range hood, meeting the needs of modern kitchens for efficient, environmentally friendly, and reliable products.

[0010] The purpose of this utility model is achieved through the following means: a smoke extraction component for a range hood, which includes a front housing and a rear housing, wherein the mating surfaces of the front housing and the rear housing are interlocked and together form a volute.

[0011] The front housing has a smoke inlet in the middle, and a guide ring is provided at the smoke inlet.

[0012] The rear housing has a mounting hole in the middle. The motor is mounted in the mounting hole through a motor bracket. A fan wheel is installed inside the volute and connected to the motor. The motor drives the fan wheel to rotate inside the volute, drawing in oil fumes from the smoke inlet and discharging them from the smoke outlet at the top of the volute.

[0013] The wind turbine includes a hub and several positioning rings. The hub is located at the center of the positioning rings and is connected to one of the positioning rings. Several blades are connected between the positioning rings. The outer and inner surfaces of the blades are arc-shaped with a high center and low sides.

[0014] Furthermore, the positioning rings are provided in three parts: the hub is connected to one positioning ring located in the middle, and the other two positioning rings are located at the front and rear ends of the blade.

[0015] Furthermore: the blade is provided with connecting pieces at both ends, and mounting grooves are provided on the front and rear positioning rings. After the connecting pieces are inserted into the mounting grooves, they are bent so that the bent connecting pieces cover the outer end face of the positioning rings.

[0016] Furthermore, the inner side of the blade is provided with a chamfer on both sides towards its two end faces, and the chamfer connects the inner side of the blade to its end faces.

[0017] Furthermore: both the front and rear housings include a surrounding plate and an end plate, and the surrounding plate and the end plate are connected by an arc transition surface; the surrounding plate is an arc shape with the inner side higher than the outer side.

[0018] Furthermore, the mating surface of the enclosure is bent outward to form a connecting plate. After the front shell and the rear shell are mated, the connecting plates are fixed together by welding.

[0019] Furthermore, the end plate, surrounding plate, and connecting plate are integrally stamped from metal sheets.

[0020] The beneficial effects of this utility model are: 1. Simple structure, low production cost, and improved market competitiveness.

[0021] 2. In this invention, the front and rear housings are joined together via mating surfaces to form a volute, avoiding the complex structure required by welding a surrounding plate and two end plates in existing technologies. Compared to the three-piece design in existing technologies, this invention requires only two parts to complete the assembly of the volute, greatly simplifying the assembly process.

[0022] The amount of welding has been significantly reduced.

[0023] 3. The connection between the front and rear shells of this utility model is achieved through a snap-fit ​​design, and the two are fixed together by welding or other fixing methods, which significantly reduces the number of welding points, reduces the difficulty of welding process, improves production efficiency, and avoids airtightness problems caused by loose welding points.

[0024] 4. Arc-shaped blade design to increase air contact area: The blades of this utility model wind turbine adopt an arc-shaped design with a high center and low sides. Compared with traditional straight blades, the air contact area is significantly increased, which can effectively improve air flow efficiency and thus increase the smoke extraction capacity of the smoke extraction component.

[0025] 5. The enclosure adopts an arc-shaped design with the inner side higher than the outer side, which is more in line with the direction of airflow in the impeller. This helps to guide the airflow smoothly into the volute, reduces airflow resistance, and improves suction and exhaust efficiency.

[0026] The rounded transition surface further reduces resistance and improves smoke extraction efficiency. Attached Figure Description

[0027] Figure 1 , 2 This is a diagram showing the final assembly and usage effect of this utility model.

[0028] Figure 3 , 4 This is an exploded view of the structure of this utility model.

[0029] Figure 5 , 6 This is a cross-sectional view of the structure of this utility model.

[0030] Figure 7 This is a schematic diagram of the wind turbine structure in this utility model.

[0031] Figure 8 This is a schematic diagram of the blade structure in this utility model. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings. A smoke extraction component for a range hood includes a front housing 1 and a rear housing 2, wherein the mating surfaces of the front housing 1 and the rear housing 2 are interlocked to form a volute.

[0033] The front housing 1 has a smoke inlet 3 in the middle, and a guide ring 4 is provided at the smoke inlet 3.

[0034] The rear housing 2 has a mounting hole 5 in the middle. The motor 6 is installed in the mounting hole 5 through the motor bracket 7. The impeller 8 is installed in the volute and connected to the motor 6. The motor 6 drives the impeller 8 to rotate in the volute, drawing in oil fumes from the smoke inlet 3 and discharging them from the smoke outlet 9 at the top of the volute.

[0035] The wind turbine 8 includes a hub 81 and several positioning rings 82. The hub 81 is located at the center of the positioning rings 82 and is connected to one of the positioning rings 82. Several blades 83 are connected between the positioning rings 82. The outer side 84 and inner side 85 of the blades 83 are arc-shaped with a high middle and low sides.

[0036] In one embodiment: the positioning ring 82 is provided in three parts, the hub 81 is connected to one positioning ring 82 located in the middle, and the other two positioning rings 82 are located at the front and rear ends of the blade 83.

[0037] In one embodiment: the blade 83 is provided with connecting pieces 86 at both ends, and mounting grooves 87 are provided on the two positioning rings 82. The connecting pieces 86 are inserted into the mounting grooves 87 and then bent so that the bent connecting pieces 86 cover the outer end face of the positioning rings 82.

[0038] In one embodiment: the inner side surface 85 of the blade 83 is provided with oblique chamfers 88 on both sides towards its two end faces, and the oblique chamfers 88 connect the inner side surface 85 of the blade 83 with its end faces.

[0039] In one embodiment: both the front housing 1 and the rear housing 2 include a surrounding plate 21 and an end plate 22, and the surrounding plate 21 and the end plate 22 are connected by an arc transition surface 23; the surrounding plate 21 is an arc shape with the inner side higher than the outer side.

[0040] In one embodiment: the mating surface of the enclosure 21 is bent outward to form a connecting plate 24. After the front housing 1 and the rear housing 2 are mated, the connecting plate 24 is fixed together by welding.

[0041] In one embodiment, the end plate 22, the surrounding plate 21 and the connecting plate 24 are integrally stamped from metal sheet.

[0042] Working principle: This fume extraction device consists of a front housing and a rear housing forming a volute. Inside the volute is a fan, which is driven by a motor to generate a strong airflow, creating a negative pressure zone to achieve the intake and exhaust of cooking fumes.

[0043] The cooking fumes enter through the inlet in the middle of the front casing of the volute. The guide ring covering the inlet guides the airflow, concentrating the fumes into the volute. The guide ring design reduces the diffusion of fumes at the inlet, improving the efficiency of fume extraction.

[0044] The motor is fixed to the mounting hole in the rear casing of the volute via a bracket, and drives the impeller to rotate at high speed inside the volute. The impeller blades are designed with a rounded shape, higher in the middle and lower on both sides, increasing the contact area between the blades and the air, allowing the airflow to be quickly compressed and accelerated for discharge. The airflow, guided efficiently by the rotation of the impeller, is discharged from the exhaust port at the top of the volute, achieving rapid extraction and removal of fumes.

[0045] It is important to note that the wind turbine in this case consists of a hub, several positioning rings, and blades. The blades feature a rounded design with a higher center and lower sides. Compared to traditional straight blades, the rounded shape significantly increases the air contact area, improving air acceleration. Simultaneously, the connecting plates at both ends of the blades fit tightly into the mounting grooves on the positioning rings, achieving a stable connection through bending and fixing. This ensures even stress distribution on the blades during high-speed rotation, preventing vibration and deformation. The wind turbine has three positioning rings: the hub is directly connected to the central positioning ring, while the front and rear positioning rings are located at the front and rear ends of the blades, respectively. This rational distribution of the three positioning rings not only effectively supports the blades but also enhances the overall structural strength of the wind turbine, reduces deformation during operation, and strengthens its stability.

[0046] The blade features a chamfered inner surface that connects the inner surface to the end face. This design further optimizes airflow guidance, reduces airflow turbulence, and improves airflow stability and power efficiency.

[0047] The front and rear shells are joined together via mating surfaces to form a volute structure. Compared to the traditional design that uses welded side panels and end plates, this invention requires only two components to assemble the volute. This integrated design greatly simplifies the assembly process, reduces the number of parts and welding points, lowers production costs, and improves the overall strength and airtightness of the volute.

[0048] In addition, the volute casing features a rounded design with a higher inner surface and a lower outer surface, which better conforms to the airflow path. The casing and end plates are connected by a rounded transition surface, which not only reduces airflow resistance but also optimizes the airflow guidance path, further improving airflow efficiency.

[0049] In summary, the smoke extraction component for a range hood of this invention achieves efficient smoke extraction and exhaust through optimized design of the volute and impeller. Its integrated volute structure simplifies the manufacturing process and improves structural stability; the impeller's arc-shaped blade design significantly improves airflow efficiency and operational stability. Overall, this invention not only solves the problems of numerous parts, extensive welding, and poor airtightness in existing technologies, but also significantly improves smoke extraction efficiency and reduces production costs, thus making it widely applicable.

[0050] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A smoke extraction component for a range hood, characterized in that: It includes a front shell (1) and a rear shell (2), the mating surfaces of the front shell (1) and the rear shell (2) are interlocked to form a volute; The front housing (1) has a smoke inlet (3) in the middle, and a guide ring (4) is provided at the smoke inlet (3). The rear housing (2) has a mounting hole (5) in the middle. The motor (6) is installed in the mounting hole (5) through the motor bracket (7). The volute is equipped with a fan (8) connected to the motor (6). The motor (6) drives the fan (8) to rotate in the volute, sucking in oil fumes from the smoke inlet (3) and discharging them from the smoke outlet (9) at the top of the volute. The wind turbine (8) includes a hub (81) and several positioning rings (82). The hub (81) is located at the center of the positioning rings (82). The hub (81) is connected to one of the positioning rings (82). Several blades (83) are connected between the positioning rings (82). The outer side (84) and inner side (85) of the blades (83) are arc-shaped with a high middle and low sides.

2. The smoke extraction component for a range hood according to claim 1, characterized in that: The positioning ring (82) is provided in three parts. The hub (81) is connected to one positioning ring (82) located in the middle, and the other two positioning rings (82) are located at the front and rear ends of the blade (83).

3. The smoke extraction component for a range hood according to claim 2, characterized in that: The blade (83) is provided with connecting pieces (86) at both ends. The blade is provided with mounting grooves (87) on the front and rear positioning rings (82). The connecting pieces (86) are inserted into the mounting grooves (87) and then bent so that the bent connecting pieces (86) cover the outer end face of the positioning rings (82).

4. The smoke extraction component for a range hood according to claim 2, characterized in that: The inner side (85) of the blade (83) is provided with oblique chamfers (88) on both sides towards its two end faces, and the oblique chamfers (88) connect the inner side (85) of the blade (83) with its end faces.

5. A smoke extraction assembly for a range hood according to claim 2, characterized in that: The front shell (1) and the rear shell (2) both include a surrounding plate (21) and an end plate (22), and the surrounding plate (21) and the end plate (22) are connected by an arc transition surface (23); the surrounding plate (21) is an arc shape with the inner side higher than the outer side.

6. The smoke extraction assembly for a range hood according to claim 5, characterized in that: The connecting plate (24) is bent outward on the mating surface of the enclosure (21). After the front shell (1) and the rear shell (2) are mated, the connecting plate (24) is fixed together by welding.

7. A smoke extraction assembly for a range hood according to claim 6, characterized in that: The end plate (22), the surrounding plate (21) and the connecting plate (24) are integrally stamped from metal sheets.

Images