Impeller and range hood

Abstract

The utility model discloses a kind of impeller and extractor hood, belong to kitchen utensil field. To solve the problems of large air flow resistance of existing impeller blade, low efficiency and easy to accumulate oil. The utility model includes coaxially arranged first fixed sheet and second fixed sheet, the first fixed sheet is provided with a plurality of blades arranged around its axis between the second fixed sheet, wherein, blade side is streamline, the first fixed sheet is equipped with installation shell, and shaft sleeve and auxiliary installation component are set on installation shell. The technical scheme is by adopting streamline blade, effectively reduce air flow resistance, improve impeller operating efficiency and oil fume separation effect, reduce oil accumulation;At the same time, auxiliary installation component is convenient for the quick preliminary fixation of impeller on motor shaft, simplifies installation process.

Description

Technical Field

[0001] This utility model relates to the field of kitchenware technology, and in particular to an impeller and a range hood. Background Technology

[0002] A range hood is a kitchen appliance installed above the stove in the kitchen. Its main function is to collect and exhaust cooking fumes, keeping the kitchen air clean and reducing the impact of fumes on human health and the kitchen environment. The impeller is the core component of the range hood, typically installed in the fan system. Its main function is as follows: Driven by a motor, the impeller rotates at high speed, creating a negative pressure zone at its center through centrifugal force. The cooking fumes above the stove are drawn into the center of the impeller under atmospheric pressure, and then thrown outwards by the impeller blades, entering the exhaust duct and being discharged outdoors.

[0003] Traditional impeller blades typically have simple shapes and lack streamlined design, resulting in greater resistance when airflow passes through the blades. This reduces impeller efficiency and increases the load on the motor. Furthermore, the surface shape of traditional blades is not conducive to the adsorption and separation of oil fumes, making the impeller prone to oil accumulation and difficult to clean. Long-term use may lead to a decline in impeller performance. Utility Model Content

[0004] The purpose of this invention is to solve the following problems of existing range hood impellers: the airflow resistance is large when passing through the blades, resulting in reduced impeller efficiency; the surface shape of the blades is not conducive to the adsorption and separation of oil fumes, and oil is easy to accumulate and difficult to clean.

[0005] To achieve the above objectives, the present invention employs the following technology: an impeller comprising a first fixed plate and a second fixed plate arranged coaxially, wherein a plurality of blades are arranged around the axis between the first fixed plate and the second fixed plate, wherein the blades have a streamlined side profile, and the first fixed plate is provided with a mounting shell, wherein the mounting shell is provided with a shaft sleeve and an auxiliary mounting assembly.

[0006] This technical solution, by designing the blade sides in a streamlined shape, significantly optimizes the airflow state within the impeller, effectively reducing the generation of eddies and turbulence, and lowering airflow resistance and noise. The direct result is that, under the same power, the impeller can achieve higher exhaust volume and air pressure, thereby improving the overall extraction efficiency of the range hood and helping to reduce motor load, achieving energy-saving operation. The streamlined blade surface allows oil-laden airflow to glide more smoothly, reducing airflow impact and stagnation on the blade surface. Under the action of strong centrifugal force, oil droplets are more easily thrown out along the smooth streamlined surface, rather than adhering and accumulating; this improves the oil fume separation efficiency and significantly reduces oil deposits inside the impeller, reducing the difficulty of daily cleaning and maintenance, and helping to maintain the long-term stable performance of the impeller. Integrating the shaft sleeve and auxiliary mounting components onto the mounting housing, and supported by the first fixing plate, constitutes a complete and functionally defined mounting structure, ensuring the structural strength and concentricity of the connection between the impeller and the motor shaft.

[0007] As a further description of the above technical solution: the blade includes an arcuate segment facing the axis of the first fixed plate and the second fixed plate, and a streamlined segment smoothly connected to the arcuate segment.

[0008] The design of the curved section facing the impeller axis provides a smooth, gradual guide surface for the incoming airflow, effectively guiding the airflow to change direction more smoothly, transitioning smoothly from axial intake to radial (or predetermined) exhaust. This significantly reduces impact losses and vortices caused by sudden airflow collisions at the blade inlet, thereby improving intake efficiency. The smoothness between the curved and streamlined sections ensures that no sudden boundary layer separation or large vortices occur during the transition from the curved to the streamlined sections, allowing the airflow to always flow close to the blade surface. This guarantees the continuity and stability of the impeller's work on the airflow (energy transfer), thus improving aerodynamic efficiency and wind pressure.

[0009] As a further description of the above technical solution: the streamlined segment adopts either a parabolic or elliptical shape, and the blade forms an angle of 15° to 30° with the plane of rotation.

[0010] As a further description of the above technical solution: the auxiliary installation component includes an installation cylinder disposed at the bottom of the installation shell, with at least two installation grooves opened on its inner ring surface, and clamping pieces disposed in the installation grooves.

[0011] As a further description of the above technical solution: one end of the clamp is fixed in the mounting groove, and the other end is connected to the slide groove through the connecting shaft to slide in the mounting groove.

[0012] As a further description of the above technical solution: the clamping piece is made of spring steel or stainless steel, and anti-slip texture is provided on the clamping piece at the position where it contacts the motor shaft of the range hood.

[0013] A range hood comprising the impeller described in any one of the foregoing.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. By designing streamlined blades, the efficiency of oil fume separation can be improved, which helps reduce the accumulation of oil fumes inside the impeller and extends the impeller's service life. Due to the high oil fume separation efficiency, there is less oil accumulation on the impeller surface, making cleaning easier. In addition, the streamlined blade profile can effectively reduce airflow resistance, making the impeller rotate more smoothly, reducing energy loss, and increasing air volume and air pressure.

[0015] 2. The auxiliary installation component enables convenient installation of the impeller. During impeller installation, the auxiliary installation component is used to snap the impeller to the motor shaft, achieving initial fixation of the impeller, which facilitates subsequent bolt connection and saves installation time. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the present invention.

[0017] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 3 This is a cross-sectional view of the blade of this utility model.

[0019] Figure 4 This is a schematic diagram of the auxiliary installation component of this utility model.

[0020] Figure 5 This is a schematic diagram of the clip structure of this utility model.

[0021] Legend: 1. First fixing plate; 2. Second fixing plate; 3. Blade; 31. Arc-shaped section; 32. Streamlined section; 4. Mounting shell; 5. Bushing; 6. Auxiliary mounting assembly; 61. Mounting cylinder; 62. Mounting groove; 621. Slide groove; 63. Clamping plate; 631. Connecting shaft; 632. Anti-slip texture. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figures 1-5 The impeller provided in this embodiment includes a first fixed plate 1 and a second fixed plate 2 arranged coaxially. A plurality of blades 3 are arranged around the axis between the first fixed plate 1 and the second fixed plate 2. A shaft sleeve 5 is provided on the first fixed plate 1 through a mounting shell 4.

[0024] In this invention, the first fixing plate 1 and the second fixing plate 2 serve as the support structure for the impeller. They are arranged coaxially to provide an installation base for the blades 3 and to ensure the overall rigidity and stability of the impeller. The motor shaft of the range hood passes through the bushing 5 on the mounting housing 4, so that the impeller is connected to the motor shaft through the bushing 5 and bolt fasteners. The motor transmits power to the impeller, causing it to rotate around the axis. The impeller rotates at high speed under the drive of the motor. Through the action of centrifugal force, a negative pressure area is formed at the center of the impeller. The fumes above the stove are drawn into the center of the impeller under the action of atmospheric pressure, and then thrown outwards under the push of the impeller blades 3, entering the exhaust pipe and being discharged outdoors.

[0025] The blade 3 has a streamlined side profile and includes an arc-shaped section 31 facing the axis of the first fixed blade 1 and the second fixed blade 2, and a streamlined section 32 smoothly connected to the arc-shaped section 31. When the impeller rotates, the arc-shaped section 31 facing the axis of the blade 3 guides the airflow to smoothly transition along the radial or axial direction of the impeller, reducing the impact and separation of the airflow at the leading edge of the blade 3. The streamlined section 32, smoothly connected to the arc-shaped section 31, forms a stable boundary layer on the surface of the blade 3 through its streamlined design, reducing turbulence and drag. In addition, when oil droplets in the flue gas impact the curved surface, they are thrown out along the tangential direction due to inertia, resulting in a lower deposition probability compared to traditional blades. There is less oil accumulation on the impeller surface, making cleaning easier.

[0026] It should be noted that the streamline section 32 adopts either a parabolic or elliptical shape. Preferably, the shape is parabolic, which allows the airflow to accelerate and decelerate more smoothly when passing through the blade 3, thereby improving the kinetic energy conversion efficiency of the airflow. The blade 3 forms an angle of 15° to 30° with the plane of rotation. The angle design can guide the airflow to flow in a direction that is more conducive to gas transport, thereby improving the aerodynamic efficiency of the impeller.

[0027] Specifically, such as Figure 1 , Figure 4 and Figure 5 As shown, an auxiliary installation component 6 is provided on the mounting shell 4. The auxiliary installation component 6 includes a mounting cylinder 61 located at the bottom of the mounting shell 4. At least two mounting grooves 62 are provided on the inner ring surface of the cylinder 61. A clamping piece 63 is provided in the mounting groove 62. One end of the clamping piece 63 is fixed in the mounting groove 62, and the other end is connected to the sliding groove 621 through the connecting shaft 631 to slide in the mounting groove 62.

[0028] One end of the clamping piece 63 is fixed in the mounting groove 62, and the other end cooperates with the sliding groove 621 through the connecting shaft 631 to form a movable elastic structure. When the motor shaft is inserted into the mounting cylinder 61, the clamping piece 63 is squeezed and slides into the mounting groove 62, while generating elastic deformation, forming a radial clamping force on the motor shaft. Therefore, the clamping piece 63 is used to initially fix the impeller during impeller installation, which facilitates subsequent bolt connection and saves installation time.

[0029] It should also be noted that the clamping plate 63 is made of either spring steel or stainless steel. Preferably, the clamping plate 63 is made of spring steel. Spring steel has excellent elastic deformation capacity and high elastic limit, and can withstand large clamping forces without permanent deformation, ensuring that the clamping plate 63 can maintain stable clamping performance after multiple insertions and removals. The clamping plate 63 is provided with anti-slip texture 632 at the position where it contacts the motor shaft of the range hood. The anti-slip texture 632 significantly improves clamping stability by increasing the friction coefficient between the clamping plate 63 and the surface of the motor shaft, preventing relative sliding or axial displacement of the motor shaft during rotation.

[0030] A range hood includes an impeller of any one of the above-mentioned features. Using this impeller improves the efficiency of oil fume separation, helps reduce the accumulation of oil fume inside the impeller, and extends the impeller's service life. Due to the high oil fume separation efficiency, there is less oil accumulation on the impeller surface, making cleaning easier. Furthermore, the streamlined profile of the blades 3 effectively reduces airflow resistance, making the impeller rotate more smoothly, reducing energy loss, and increasing airflow and air pressure.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An impeller, characterized in that, It includes a first fixing plate (1) and a second fixing plate (2) arranged coaxially. A plurality of blades (3) are arranged around the axis between the first fixing plate (1) and the second fixing plate (2). The blades (3) have a streamlined side. The first fixing plate (1) is provided with a mounting shell (4). The mounting shell (4) is provided with a bushing (5) and an auxiliary mounting assembly (6).

2. The impeller according to claim 1, characterized in that, The blade (3) includes an arcuate segment (31) oriented toward the axis of the first fixed plate (1) and the second fixed plate (2), and a streamlined segment (32) smoothly connected to the arcuate segment (31).

3. An impeller according to claim 2, characterized in that, The streamlined segment (32) adopts either a parabolic or elliptical shape, and the blade (3) forms an angle of 15° to 30° with the plane of rotation.

4. An impeller according to claim 1, characterized in that, The auxiliary installation component (6) includes an installation cylinder (61) disposed at the bottom of the installation shell (4), with at least two installation grooves (62) opened on its inner ring surface, and a clamping piece (63) disposed in the installation groove (62).

5. An impeller according to claim 4, characterized in that, One end of the clip (63) is fixed in the mounting groove (62), and the other end is connected to the slide groove (621) via the connecting shaft (631) to slide in the mounting groove (62).

6. A vane according to claim 5, wherein The clamp (63) is made of spring steel or stainless steel, and anti-slip texture (632) is provided on the clamp (63) at the position where it contacts the motor shaft of the range hood.

7. A range hood characterized by The range hood includes the impeller as described in any one of claims 1-6.

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