Range hood

Abstract

This utility model relates to the field of household appliance technology and discloses a range hood, including a body, an air duct, and a centrifugal fan disposed within the air duct. The centrifugal fan includes a volute, an impeller disposed within the volute, and a motor for driving the impeller to rotate. The motor has a wiring port extending from its housing. The motor is fixedly connected to the volute via a motor bracket. The motor bracket is provided with a mounting part for fixing the motor, and the mounting part is provided with a positioning part for limiting the installation angle of the motor at a preset angle. The preset angle is configured such that when the motor is installed, the opening direction of the wiring port faces the direction of gravity. By providing a positioning part on the motor bracket, the opening of the motor's wiring port can be positioned facing directly downwards, which can prevent oil stains from the air duct, volute, and motor housing from dripping or sliding into the wiring port, thereby effectively protecting the electrical components inside the motor from the corrosion and damage of oil stains and ensuring the safe and stable operation of the entire machine.

Description

Technical Field

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

[0002] Range hoods are indispensable appliances in modern kitchens. Their core component, the centrifugal fan, uses a high-speed rotating impeller to generate negative pressure, drawing in cooking fumes and expelling them outdoors, thus purifying the kitchen air. Centrifugal fans typically consist of a volute, an impeller, and a motor that drives the impeller.

[0003] In existing range hood structures, the motor is fixed to the volute via a motor bracket. However, during installation, the motor's installation angle is often arbitrary and without specific constraints. After prolonged use, grease from cooking fumes condenses into oil droplets inside the range hood and on the volute. If the motor's wiring port happens to be facing upwards or slightly upwards, these oil droplets, falling due to gravity, are highly likely to flow into the motor's interior through the wiring port.

[0004] Oil droplets entering the motor can cause various problems. For example, they can corrode the insulating varnish of the motor coils, potentially causing a short circuit and burning out the motor. Accumulated oil can also affect the dynamic balance of the motor rotor, increasing operating noise and vibration. In severe cases, it can even lead to safety hazards such as electrical leakage. These issues seriously affect the reliability of the range hood and shorten the lifespan of the motor and even the entire machine. Utility Model Content

[0005] In response to the problems mentioned in the background art, this application provides a range hood that solves the problem in the prior art where oil stains easily enter the motor due to arbitrary motor installation angle, thereby affecting the motor's lifespan and operational safety.

[0006] To achieve the above-mentioned objectives, the present invention employs the following technical solution: In some embodiments of this application, a range hood is provided, comprising: The body has a smoke collection hood at its lower part; An air duct is located inside the machine body, and its inlet is connected to the smoke collection hood; A centrifugal fan, located inside the duct, is used to draw oil fumes from the duct inlet and discharge them from the machine body. The centrifugal fan includes a volute, an impeller disposed within the volute, and a motor for driving the impeller to rotate; the motor has a wiring port extending from its housing; the motor is fixedly connected to the volute via a motor bracket; The motor bracket is provided with a mounting part for fixing the motor. The mounting part is provided with a positioning part. The positioning part, through cooperation with the wiring port, limits the installation angle of the motor to a preset angle. The preset angle is configured such that when the motor is installed, the opening of the wiring port faces the direction of gravity.

[0007] In some embodiments of this application, the mounting portion includes at least one mounting hole, and the positioning portion is a positioning notch extending from the edge of the mounting hole. This structure is simple and easy to manufacture. The connection between the mounting hole and the positioning notch allows the positioning and fixing steps to be completed in one go, improving assembly efficiency.

[0008] In some embodiments of this application, the periphery of the mounting hole is provided with a flange structure. The flange structure increases the structural strength and support rigidity of the mounting part, ensuring that the motor mounting surface is precisely parallel to the plane where the motor bracket is located, and ensuring that the motor shaft remains perpendicular to the plane where the motor bracket is located after the motor is fixed.

[0009] In some embodiments of this application, the volute includes a front volute plate, a rear volute plate, and a volute surround plate connecting the front and rear volute plates. The front volute plate, rear volute plate, and volute surround plate together form a chamber for accommodating the impeller. This structure clearly defines the basic components of the volute and provides a basis for subsequent structural improvements.

[0010] In some embodiments of this application, the volute is provided with an air outlet, the edge of which is folded outward to form a folded edge structure for installation and fixation. This folded edge structure provides an installation interface for the volute, eliminating the need for a separate flange, reducing the number of parts, and facilitating a secure connection between it and the air duct.

[0011] In some embodiments of this application, the folded edge structure includes: a first bent portion disposed on the front plate of the volute; a second bent portion disposed on the rear plate of the volute; a third bent portion and a fourth bent portion disposed on the volute surround plate, wherein the four bent portions are located on the same plane and together form a mounting plane; and at least one connecting portion for connecting adjacent first bent portions, second bent portions, third bent portions and fourth bent portions. By combining the folded edges on different plates into a coplanar mounting plane, the flatness and reliability of the volute mounting are greatly improved.

[0012] In some embodiments of this application, the motor bracket is integrally formed on the rear plate of the volute; the rear plate of the volute has a central through hole; the motor bracket includes an annular fixing plate located at the center of the central through hole and multiple connecting ribs radiating outward from the outer periphery of the fixing plate and connecting to the edge of the central through hole; wherein, the fixing plate constitutes the mounting part; and a rear air inlet is formed between adjacent connecting ribs for airflow. This integrated design reduces the number of parts and assembly steps, lowers manufacturing costs, and ensures the concentricity of the motor bracket and the rear plate of the volute, which is crucial for ensuring the stable operation of the motor and impeller.

[0013] In some embodiments of this application, reinforcing ribs are provided on the outer periphery of the central through hole on the rear plate of the volute. These reinforcing ribs improve the structural rigidity and deformation resistance of the rear plate of the volute, and especially effectively suppress vibration of the plate during motor operation, thereby reducing noise.

[0014] In some embodiments of this application, at least one volute fixing member is further included. The volute fixing member is fixedly connected to the outer surface of the volute enclosure, and the volute is fixed within the air duct by the volute fixing member. The volute fixing member, disposed on the volute enclosure, ensures smooth air intake for the front and rear volute panels.

[0015] In some embodiments of this application, at least one oil drain hole is provided on the shell wall of the volute, and the oil drain hole is located in the region of lowest gravity of the volute under normal operating posture. This oil drain hole provides a drainage channel for oil that may accumulate inside the volute, helping to keep the inside of the volute clean and preventing excessive oil accumulation from affecting the fan performance.

[0016] Compared with the prior art, the advantages and positive effects of this utility model are: In the above embodiments, the range hood, by setting a positioning part on the motor bracket, can position the opening of the motor's wiring port to face directly downwards, which can prevent oil stains on the air duct, volute, and motor housing from dripping or sliding into the wiring port, thereby effectively protecting the electrical components inside the motor from the corrosion and damage of oil stains, and ensuring the long-term safe and stable operation of the whole machine.

[0017] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the structure of the air duct and centrifugal fan in a range hood according to some embodiments is shown; Figure 2 A schematic diagram of a centrifugal fan in a range hood according to some embodiments is shown, wherein the impeller is not shown. Figure 3 A schematic diagram of the structure of a centrifugal fan casing in a range hood according to some embodiments is shown; Figure 4 An exploded view of the volute casing in a range hood according to some embodiments is shown, but the air inlet ring is not shown. Figure 5 A schematic diagram of the structure of the front panel of the volute in a range hood according to some embodiments is shown; Figure 6 The diagram shows the state of the wiring port of the centrifugal fan in the range hood after the motor is installed and the motor bracket positioning part is engaged with it, according to some embodiments. Figure 7 A schematic diagram of the structure of the rear plate of the volute in a range hood according to some embodiments is shown; Figure 8 A schematic diagram of the structure of the volute enclosure in a range hood according to some embodiments is shown; Figure 9 Show Figure 8 Enlarged view at point I; Figure 10 A lateral cross-sectional view of the air duct and centrifugal fan in a range hood according to some embodiments is shown; Explanation of reference numerals in the attached figures: 100-Air duct; 200-volute; 210 - Front panel of the volute; 211 - First bend; 212 - Front air inlet; 220 - Rear plate of the volute; 221 - Second bend; 223 - Rear air inlet; 224 - Reinforcing rib; 230 - Casing enclosure plate; 231 - Third bend; 232 - Fourth bend; 233 - Connecting part; 234 - Air outlet; 235 - Oil leakage hole; 240 - Motor bracket; 241 - Mounting part; 242 - Motor mounting plate; 2421 - Mounting hole; 2422 - Positioning part; 2423 - Fixing hole; 2424 - Flanged structure; 243 - Connecting rib; 250 - Inlet ring; 300 - Motor; 310 - Wiring port; 400-Volume fixing component. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0026] like Figures 1-10 As shown, some embodiments of this application provide a range hood that aims to solve the technical problem in the prior art where oil stains easily enter the motor due to arbitrary motor installation angle, thereby affecting the motor's lifespan and operational safety.

[0027] A range hood consists of a body, the lower part of which is usually designed as an open smoke collection hood to cover the cooking area of ​​the stove and efficiently collect the rising fumes.

[0028] Reference Figure 1 The machine body is equipped with an air duct 100, which is a closed channel for the flow of oil fumes. The inlet of the air duct 100 is connected to the cavity of the fume collection hood, so that the oil fumes collected by the fume collection hood can smoothly enter the air duct 100.

[0029] A centrifugal fan is installed inside the air duct 100. The function of the centrifugal fan is to generate strong suction to draw the oil fumes in from the inlet of the air duct 100 and finally exhaust them outside the machine through the exhaust port on the machine body.

[0030] See Figure 2 The centrifugal fan mainly consists of three parts: the volute 200, the impeller, and the motor 300.

[0031] An impeller (not shown) is located at the center inside the volute 200, and has multiple blades evenly distributed on it. The motor 300 provides power to drive the impeller to rotate at high speed.

[0032] like Figure 6 As shown, the motor 300 has a wiring port 310 extending from its outer housing, which is the interface for the motor 300 to be electrically connected to an external power source.

[0033] The motor 300 is fixedly connected to the volute 200 via the motor bracket 240 to ensure that the motor 300 is stable during operation.

[0034] like Figure 4 As shown, the motor bracket 240 can be integrally formed onto the volute housing 200. Of course, the motor bracket 240 can also be fixedly connected to the volute housing 200 as a separate component.

[0035] In this application, in order to solve the problem of oil contamination entering the motor 300 mentioned in the background art, the structure of the motor bracket 240 has been specially designed.

[0036] Specifically, such as Figure 5 As shown, the motor bracket 240 is provided with a mounting part 241 for fixing the motor 300. A positioning part 2422 is provided on the mounting part 241.

[0037] The function of the positioning part 2422 is to form a unique structural relationship with the wiring port 310 of the motor 300 itself.

[0038] During assembly, the operator must align the wiring port 310 of the motor 300 with the positioning part 2422 on the motor bracket 240 so that the motor 300 can be correctly placed on the mounting part 241 and the subsequent fastening installation can be completed. If the rotation angle of the motor 300 is incorrect, its wiring port 310 will cause structural interference with the positioning part 2422, thus making installation impossible.

[0039] Through this error-proof design, the positioning part 2422 and the wiring port 310 work together to forcibly limit the installation angle of the motor 300 to a preset angle.

[0040] The preset angle is configured such that when the motor 300 is installed, the opening direction of its wiring port 310 is exactly parallel to the direction of gravity and is facing directly downwards, i.e., towards the ground.

[0041] When the range hood is working, the grease separated from the fumes condenses on the cooler volute 200 and the inner wall of the range hood, forming oil droplets. Due to gravity, the oil droplets always move vertically downwards. In the structure of this application, the opening of the motor 300 wiring port 310 is fixed at a position facing directly downwards, i.e., the lowest point of the circumferential contour of the motor 300 housing. Therefore, any oil droplet dripping from the upper or side of the motor 300 housing will inevitably miss the port opening at the lowest point, instead sliding down from both sides of the port and finally dripping into the oil collection device below. This design fundamentally eliminates the possibility of grease dripping into the wiring port 310 due to gravity, effectively protecting the electrical components inside the motor 300 from grease corrosion and damage, avoiding potential short circuits, abnormal noises, vibrations, and other malfunctions, greatly improving the operational reliability and service life of the motor 300, and ensuring the long-term safe and stable operation of the entire machine.

[0042] The aforementioned range hood, by setting a positioning part 2422 on the motor bracket 240, can position the opening of the wiring port 310 of the motor 300 to face directly downwards. This can prevent oil stains on the duct 100, volute 200, and motor 300 housing from dripping or sliding into the wiring port 310, thereby effectively protecting the electrical components inside the motor 300 from the corrosion and damage of oil stains and ensuring the long-term safe and stable operation of the entire machine.

[0043] In some embodiments of this application, the mounting portion 241 includes at least one mounting hole 2421. The outer housing of the motor 300 can be fitted and fixed within the mounting hole 2421.

[0044] Accordingly, the positioning part 2422 is a positioning notch extending from the edge of the mounting hole 2421. That is, the positioning notch is directly connected to the mounting hole 2421.

[0045] The positioning notch can be a concave square hole whose shape and size match the wiring port 310 of the motor 300. The positioning notch can accommodate the protruding wiring port 310.

[0046] During installation, the operator aligns the wiring port 310 of the motor 300 with the square hole notch, and simultaneously aligns the motor 300 with the mounting hole 2421. Then, the entire motor 300 is inserted into the mounting hole 2421, and finally, the final locking and fixing is completed by several fasteners (such as screws locked in from the side of the bracket).

[0047] In other embodiments, the positioning part 2422 is not limited to a notch. For example, it can be a raised positioning pin provided on the mounting part 241, and a corresponding positioning hole provided on the housing of the motor 300 to cooperate with the positioning pin. As long as the position of the wiring port 310 of the motor 300 can be limited, it falls within the protection scope of this application.

[0048] In some embodiments of this application, in order to further improve the stability and accuracy of installation, a flange structure 2424 may be provided around the periphery of the mounting hole 2421.

[0049] The flange structure 2424 can be formed by integrally folding the plate at the edge of the mounting hole 2421 outward (or inward). The flange structure 2424 increases the structural strength and support rigidity of the mounting part 241, which can ensure that the mounting surface of the motor 300 is precisely parallel to the plane where the motor bracket 240 is located, and can ensure that the axis of the motor 300 remains perpendicular to the plane where the motor bracket 240 is located after the motor 300 is fixed.

[0050] In some embodiments of this application, see Figures 4-8 The volute 200 can be composed of three main parts: the front plate 210, the rear plate 220, and the volute casing 230 connecting the two.

[0051] The front plate 210 and rear plate 220 of the volute are roughly parallel plate structures, while the volute casing shroud 230 is a curved plate.

[0052] The front plate 210, rear plate 220, and casing 230 are connected together by welding, riveting, or snap-fitting to form a closed chamber with a spiral flow channel inside. This chamber is used to accommodate the impeller and to pressurize and guide the airflow within it.

[0053] The rear air inlet 223 is usually provided on the rear plate 220 of the volute, and the front air inlet 212 may also be provided on the front plate 210 of the volute.

[0054] In some embodiments of this application, such as Figure 3 An air inlet ring 250 is also provided at the front air inlet 212 of the front plate 210 of the volute to guide airflow into the interior of the volute 200. Flanged holes are provided on the front plate 210 of the volute around the front air inlet 212, and the air inlet ring 250 is detachably fixed to the front plate 210 of the volute by screws or other fasteners.

[0055] In some embodiments of this application, in order to facilitate the installation of the volute 200 in the body of the range hood, the volute 200 is provided with an air outlet 234, which is a channel through which pressurized fumes are discharged.

[0056] At the edge of the air outlet 234, the sheet metal is folded outwards to form a flat folded edge structure. This folded edge structure forms the mounting flange of the volute 200, providing a standardized mounting surface.

[0057] In some embodiments of this application, since the volute 200 is composed of three parts—a front plate, a rear plate, and a surrounding plate—the edge of its air outlet 234 is also formed by the edges of these three plates.

[0058] Therefore, the folded edge structure is also composed of multiple parts: such as Figure 5 A first bend 211 is provided at the edge of the air outlet of the front plate 210 of the volute; as shown Figure 7 A second bend 221 is provided at the edge of the air outlet on the rear plate 220 of the volute; as shown Figure 8 At the edge of the air outlet of the volute enclosure 230, there is a pair of third bends 231 and fourth bends 232.

[0059] The four bends are on the same plane, thus forming a complete and flat installation surface.

[0060] Multiple flange holes can also be arranged at intervals on the four bends to connect and fix the air outlet 234 of the volute 200 to the air duct 100.

[0061] To ensure the structural strength and integrity of this modular mounting surface, at least one connecting part 233 is provided. The connecting part 233 can be a connecting plate, such as... Figure 9 As shown. For example, connecting plates are provided at both ends of the third bend 231 and the fourth bend 232 on the volute casing 230. These connecting plates are firmly connected to the first bend 211 on the front plate 210 and the second bend 221 on the rear plate 220 of the volute casing by welding or other means, so that the entire folded structure forms a rigid frame.

[0062] To further enhance strength, reinforcing flanges extending towards the lower side of the volute 200 can be provided at each bend, such as reinforcing flange 2221, reinforcing flange 2111, and reinforcing flange 2321, to resist deformation during installation and use.

[0063] In some embodiments of this application, see Figure 5 The motor bracket 240 and the volute rear plate 220 are designed as an integral stamped structure.

[0064] Specifically, when processing the flat plate 220 of the volute rear plate, the three-dimensional structure of the motor bracket 240 is directly stamped and stretched in the central area of ​​the plate using stamping and stretching dies.

[0065] A large central through hole is punched out in the center of the rear plate 220 of the volute for airflow.

[0066] A circular motor mounting plate 242 is retained or formed in the center of the central through hole. The motor mounting plate 242 constitutes the aforementioned mounting part 241. Mounting holes 2421 for the motor 300 to pass through and positioning notches for positioning are both formed on the motor mounting plate 242.

[0067] The motor mounting plate 242 has a fixing hole 2423 for fixing connection with the mounting part 241 on the motor 300.

[0068] Multiple connecting ribs 243 extend radially outward from the outer periphery of the motor mounting plate 242 and eventually connect to the outer edge of the central through hole. The connecting ribs 243 serve to support the motor mounting plate 242, ensuring that it is suspended in the center of the central through hole.

[0069] The space naturally formed between two adjacent connecting ribs 243 constitutes the rear air inlet 223 through which airflow passes. In order to make the airflow smoother and reduce flow resistance, the edges of each rear air inlet 223 can be provided with a flange structure facing inwards towards the volute 200.

[0070] This integrated design of the motor bracket 240 and the volute rear plate 220 greatly simplifies the structure of the centrifugal fan, reduces the number of parts and the cumulative error caused by assembly, and effectively lowers production costs. More importantly, it fundamentally ensures the coaxiality of the motor 300 mounting position and the center of the volute 200, providing structural protection for the efficient and low-noise operation of the fan.

[0071] In some other embodiments, the motor bracket 240 may also be a separate component, fixed to the volute rear plate 220.

[0072] In some embodiments of this application, a reinforcing structure is provided to further enhance the overall strength of the rear plate 220 of the volute.

[0073] Specifically, on the rear plate 220 of the volute, multiple reinforcing ribs 224 are integrally stamped around the outer periphery of the central through hole (i.e., the motor bracket 240). These reinforcing ribs 224 can be arranged uniformly in a circumferential shape, and their cross-sectional shape can be concave tension ribs or convex reinforcing bosses.

[0074] The addition of stiffener 224 significantly improves the bending and torsional stiffness of the rear plate 220 of the volute. When the motor 300 is running, the vibration generated can be effectively absorbed and suppressed by stiffener 224, preventing resonance of the plate and thus significantly reducing structural noise.

[0075] In some embodiments of this application, such as Figure 1 As shown, the volute 200 is fixed in the air duct 100 by at least one volute fixing member 400.

[0076] Specifically, the volute retainer 400 can be an L-shaped or Z-shaped bracket or a lug with screw holes.

[0077] The volute fixing component 400 can be fixed to the outer surface of the volute casing plate 230 by means of welding or riveting, for example, it can be set on the left and right sides of the volute casing plate 230.

[0078] Fixing the volute fixing component 400 to the volute enclosure plate 230 ensures smooth air intake for the volute front plate 210 and volute rear plate 220.

[0079] This is because the main air intake area of ​​the volute 200 is located in the central area of ​​the front plate 210 and the rear plate 220 of the volute. If the fixed structure is set on these two key air intake surfaces, it will inevitably obstruct and turbulent the intake airflow, reducing the air intake efficiency.

[0080] This application moves the fastener to the volute enclosure 230 in the side, non-air intake area, so that the air intakes of the front and rear panels of the volute 200 can remain in a complete and unobstructed open state, thereby maximizing the smoothness of the airflow path, effectively reducing wind resistance, and thus improving the air volume and oil fume extraction effect of the whole machine.

[0081] In some embodiments of this application, such as Figure 10 As shown, in order to deal with the oil stains that may accumulate inside the volute 200, at least one oil leakage hole 235 is provided on the shell wall of the volute 200.

[0082] After the oil congeals on the inner wall of the volute 200, it will flow to the lowest point of the volute 200 under the action of gravity. Therefore, the oil drain hole 235 is set in the area of ​​the lowest gravity point of the volute 200 in the normal installation and use posture, usually located at the bottom of the volute casing 230.

[0083] To ensure smoother oil drainage and prevent clogging of the oil hole, the oil drain hole 235 can be designed in a conical shape, i.e., a shape with a larger inner opening and a smaller outer opening.

[0084] Through the oil drain hole 235, the liquid oil accumulated in the volute 200 can be smoothly discharged and dripped into the oil collection box or tank below, thereby keeping the volute 200 and impeller relatively clean and avoiding problems such as impeller dynamic balance and increased wind resistance caused by excessive oil accumulation.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

[0086] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. A range hood, comprising: The body has a smoke collection hood at its lower part; An air duct is located inside the machine body, and its inlet is connected to the smoke collection hood; A centrifugal fan, located inside the duct, is used to draw oil fumes from the duct inlet and discharge them from the machine body. The centrifugal fan includes a volute, an impeller disposed within the volute, and a motor for driving the impeller to rotate; the motor has a wiring port extending from its housing; the motor is fixedly connected to the volute via a motor bracket; Its features are, The motor bracket is provided with a mounting part for fixing the motor, and the mounting part is provided with a positioning part for limiting the installation angle of the motor to a preset angle; the preset angle is configured such that when the motor is installed, the opening of the wiring port faces the direction of gravity.

2. The range hood according to claim 1, characterized in that The mounting portion includes at least one mounting hole, and the positioning portion is a positioning notch extending from the edge of the mounting hole; the positioning notch mates with the wiring port.

3. The range hood according to claim 2, characterized in that The periphery of the mounting hole is provided with a flange structure.

4. The range hood according to claim 1, characterized in that The volute includes a front plate, a rear plate, and a casing plate connecting the front plate and the rear plate. The front plate, rear plate, and casing plate together form a chamber for accommodating the impeller.

5. The range hood according to claim 4, characterized in that, The volute is provided with an air outlet, the edge of which is folded outward to form a folded edge structure for installation and fixation.

6. The range hood according to claim 5, characterized in that, The folded edge structure includes: The first bend is provided on the front plate of the volute; The second bend is provided on the rear plate of the volute. The third and fourth bends are provided on the volute casing plate, and the four bends are located on the same plane, forming a mounting plane together; and At least one connecting portion is provided for connecting adjacent first bends, second bends, third bends, and fourth bends.

7. The range hood according to claim 4, characterized in that, The motor bracket is integrally formed on the rear plate of the volute; the rear plate of the volute is provided with a central through hole; The motor bracket includes a motor mounting plate located at the center of the central through hole and multiple connecting ribs radiating outward from the outer periphery of the motor mounting plate and connecting to the edge of the central through hole; wherein, the motor mounting plate constitutes the mounting part; and a rear air inlet is formed between adjacent connecting ribs for airflow.

8. The range hood according to claim 7, characterized in that, A reinforcing structure is provided on the outer periphery of the central through hole on the rear plate of the volute.

9. The range hood according to claim 4, characterized in that, It also includes at least one volute fixing member, which is fixedly connected to the outer surface of the volute enclosure plate, and the volute is fixed in the air duct by the volute fixing member.

10. The range hood according to claim 1, characterized in that, At least one oil leakage hole is provided on the shell wall of the volute, and the oil leakage hole is located in the region of the lowest gravity of the volute under normal use posture.

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