Range hood

Abstract

The embodiment of the utility model belongs to the household appliance technology, and provides an extractor hood which comprises a shell, an inner cavity is formed in the shell, a first air inlet is formed in the shell, and the first air inlet communicates with the inner cavity; the throttling assembly is located in the inner cavity, a throttling air channel is formed in the throttling assembly, a second air inlet and a second air outlet which communicate with the throttling air channel are formed in the throttling assembly, and the opening size of the throttling air channel is gradually reduced in the direction from the second air inlet to the second air outlet; and the fan assembly is located in the inner cavity, and the fan assembly is configured to convey oil smoke into the fan assembly through the first air inlet, the second air inlet, the throttling air duct and the second air outlet in sequence. The range hood provided by the utility model is relatively low in temperature rise.

Description

Technical Field

[0001] The embodiments of the present application relate to home appliance technologies. In particular, it relates to a range hood. Background Art

[0002] Range hoods have become indispensable kitchen appliances in daily life.

[0003] In related technologies, a range hood includes a housing. An oil screen assembly is provided at the bottom of the housing. A fan assembly is located inside the housing. Under the action of the fan assembly, cooking fumes enter the housing through the oil screen assembly, and then are discharged into an external flue through the fan assembly.

[0004] However, the temperature rise of the fan assembly is relatively high. Summary of the Utility Model

[0005] The embodiments of the present application provide a range hood with a relatively low temperature rise.

[0006] In a first aspect, the embodiments of the present application provide a range hood, including:

[0007] A housing, the housing is configured with an inner cavity, and the housing is configured with a first air inlet, and the first air inlet is communicated with the inner cavity;

[0008] A throttling assembly, the throttling assembly is located in the inner cavity, the throttling assembly is configured with a throttling air duct, and the throttling assembly is configured with a second air inlet and a second air outlet communicated with the throttling air duct. Along the second air inlet to the second air outlet, the opening size of the throttling air duct gradually decreases;

[0009] A fan assembly, the fan assembly is located in the inner cavity, and the fan assembly is configured to sequentially transport cooking fumes through the first air inlet, the second air inlet, the throttling air duct, and the second air outlet into the fan assembly.

[0010] In this way, the throttling air duct can play a throttling role. When cooking fumes pass through the throttling air duct, the temperature of the cooking fumes can be reduced. When the cooking fumes with reduced temperature flow through the fan assembly, the heat exchanged with the fan assembly is reduced, and the temperature rise of the fan assembly is relatively small.

[0011] In some embodiments of the present application, the number of throttling air ducts is at least two, and the at least two throttling air ducts are arranged at intervals;

[0012] The number of second air inlets is at least two, the number of second air outlets is at least two, the second air inlets are arranged in one-to-one correspondence with the throttling air ducts, and the second air outlets are arranged in one-to-one correspondence with the throttling air ducts.

[0013] In this way, the air circulation volume per unit time increases, which is beneficial to improving the efficiency of air circulation, and thus improving the effect of fume extraction.

[0014] In some embodiments of the present application, the throttling assembly is connected to the fan assembly, and the second air outlet of the throttling assembly is opposite to the third air inlet of the fan assembly.

[0015] In this way, the second air outlet is opposite to the third air inlet, which is conducive to the oil smoke entering the third air inlet from the second air outlet, thereby facilitating the oil smoke to smoothly enter the fan assembly from the throttling assembly.

[0016] In some embodiments of the present application, the throttling assembly includes a first end face, a second end face and a side face connected to each other, the first end face is opposite to the fan assembly, the second end face is located on the side of the first end face away from the fan assembly, the side face is located between the first end face and the second end face, the second air inlet is located on the second end face, and the second air outlet is located on the first end face;

[0017] The first end surface abuts against the fan assembly.

[0018] This helps to reduce the overflow of oil smoke from the gap between the throttling component and the fan component.

[0019] In some embodiments of the present application, the first end face is parallel to the second end face, and the extension direction of the throttling air duct is perpendicular to the first end face.

[0020] In this way, the length of the throttling air duct is shorter, which is beneficial to reducing the resistance of air flow.

[0021] In some embodiments of the present application, the orthographic projection of the first end surface toward the plane where the second end surface is located is located inside the second end surface.

[0022] In this way, the number of second air inlets and second air outlets can be increased, and the number of throttling air ducts can be increased.

[0023] In some embodiments of the present application, the fan assembly includes a volute, a motor and an impeller located in the volute, the motor is connected to the volute, and the impeller is connected to the motor;

[0024] The volute is configured with a third air inlet and a first air outlet, and the first air outlet is communicated with the outside of the shell;

[0025] The fan assembly is configured to transport the oil smoke to the outside of the shell through the first air inlet, the second air inlet, the throttling air duct, the second air outlet, the fan assembly and the first air outlet in sequence.

[0026] In this way, by providing the volute, the fan assembly has less energy loss and less noise when it is running.

[0027] Some embodiments of the present application further include a sound absorbing member, which is arranged on the inner wall of the throttling air duct.

[0028] In this way, the sound-absorbing member can reduce the aerodynamic noise caused by the reduction of the cross-sectional area of the throttle air duct. Moreover, the sound-absorbing member can increase the wall roughness of the inner wall of the throttle air duct, increase the resistance between the wall and the oil fume, and convert more potential energy of the oil fume into work against the resistance, further reducing the temperature of the oil fume.

[0029] In some embodiments of the present application, the sound-absorbing members are arranged in one-to-one correspondence with the throttle air ducts;

[0030] And / or, the sound-absorbing members are evenly distributed on the inner wall of the throttle air duct.

[0031] In this way, the area of the sound-absorbing member is relatively large, which is beneficial to improving the noise reduction and temperature reduction effects.

[0032] In a second aspect, embodiments of the present application provide a range hood, including:

[0033] A housing;

[0034] A throttle assembly, the throttle assembly is located inside the housing, and the throttle assembly is configured with a throttle air duct;

[0035] A fan assembly, the fan assembly is located inside the housing, and the fan assembly is arranged to discharge the oil fume to the outside of the housing through the throttle air duct and the fan assembly in sequence;

[0036] Along the air flow direction, the flow area of the throttle air duct gradually decreases.

[0037] In this way, the throttle air duct can play a throttling role. When the oil fume passes through the throttle air duct, the temperature of the oil fume can be reduced. When the oil fume with reduced temperature flows through the fan assembly, the heat exchange with the fan assembly is reduced, and the temperature rise of the fan assembly is relatively small. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application or the implementation manners in the related art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the related art. Obviously, the following drawings are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0039] Figure 1 It is a schematic structural diagram of the range hood provided by the embodiment of the present application;

[0040] Figure 2 It is a schematic structural diagram of the range hood provided by the embodiment of the present application after removing part of the housing;

[0041] Figure 3 It is a schematic structural diagram of the throttle assembly and the fan assembly in the range hood provided by the embodiment of the present application;

[0042] Figure 4Schematic diagram of the throttling component and the fan component in the range hood provided by the embodiment of the present application from another angle;

[0043] Figure 5 Schematic diagram of the throttling component and the fan component in the range hood provided by the embodiment of the present application from yet another angle;

[0044] Figure 6 Schematic diagram of the throttling component in the range hood provided by the embodiment of the present application;

[0045] Figure 7 Schematic diagram of the throttling component in the range hood provided by the embodiment of the present application from another angle;

[0046] Figure 8 Front view of the throttling component in the range hood provided by the embodiment of the present application;

[0047] Figure 9 Rear view of the throttling component in the range hood provided by the embodiment of the present application;

[0048] Figure 10 Cross-sectional view of the throttling component in the range hood provided by the embodiment of the present application;

[0049] Figure 11 Schematic diagram of the fan component in the range hood provided by the embodiment of the present application;

[0050] Figure 12 Schematic diagram of the fan component in the range hood provided by the embodiment of the present application with part of the volute removed.

[0051] Reference numerals:

[0052] 100 - housing; 110 - first air inlet; 120 - box part; 130 - frame part;

[0053] 200 - oil screen assembly;

[0054] 300 - smoke guide plate assembly;

[0055] 400 - throttling component; 410 - throttling air duct; 420 - second air inlet; 430 - second air outlet; 440 - first end face; 450 - second end face; 460 - side face;

[0056] 500 - fan component; 510 - third air inlet; 520 - volute; 521 - first air outlet; 522 - first cover plate; 523 - second cover plate; 524 - enclosing plate; 530 - motor; 540 - impeller; 550 - extension piece. Detailed implementation manners

[0057] As described in the background art, an oil fume extractor includes a housing. An oil mesh assembly is provided at the bottom of the housing. The fan assembly is located inside the housing. Under the action of the fan assembly, oil fumes enter the housing through the oil mesh assembly and are then discharged into the external flue through the fan assembly. When the motor in the fan assembly is powered on, a current heating effect is generated. If the temperature rise is too high, the insulation will age and the service life of the motor will be shortened. Long-term high temperature rise may cause insulation damage. In the oil fume extractor, the motor will directly contact the oil fumes. Insulation damage will cause the wires of the motor to directly contact the oil fumes, resulting in a fire. The temperature rise of the motor depends on the heat generation and heat dissipation during the operation of the motor. When the oil fume extractor is working, it inhales high-temperature oil fumes. At this time, the motor is heated by the heat conduction of the oil fumes, thereby increasing the temperature rise of the motor.

[0058] Based on this, in order to reduce the heat conduction amount of the oil fumes to the motor and lower the temperature rise. In the oil fume extractor provided in the present application, by providing a throttling assembly, the throttling assembly is configured with a throttling air duct. The oil fumes are sequentially discharged to the outside of the housing through the throttling air duct and the fan assembly. Along the air flow direction, the flow area of the throttling air duct gradually decreases. In this way, the throttling air duct can play a throttling role. When the oil fumes pass through the throttling air duct, the temperature of the oil fumes can be reduced. When the oil fumes with reduced temperature flow through the fan assembly, the heat exchanged with the fan assembly is reduced, and the temperature rise of the motor in the fan assembly is smaller.

[0059] Furthermore, in order to reduce the temperature rise of the motor and at the same time reduce the noise of the oil fume extractor. In the oil fume extractor provided in the present application, a sound-absorbing member is provided on the inner wall of the throttling air duct. The sound-absorbing member can effectively absorb the pneumatic noise. At the same time, the sound-absorbing member can increase the wall roughness of the inner wall of the throttling air duct, increase the resistance between the wall and the oil fumes, and convert more potential energy of the oil fumes into work against the resistance, further reducing the temperature of the oil fumes.

[0060] To make the purpose, implementation mode and advantages of the present application clearer, the following will clearly and completely describe the exemplary implementation mode of the present application with reference to the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.

[0061] It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the following described implementation modes, rather than intending to limit the implementation modes of the present application. Unless otherwise specified, these terms should be understood in their ordinary and common meanings.

[0062] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclude inclusion. For example, a product or device including a series of components does not necessarily have to be limited to those components clearly listed, but may include other components not clearly listed or inherent to these products or devices.

[0063] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present application.

[0064] The terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0065] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0066] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0067] Figure 1 It is a schematic structural diagram of an oil fume machine provided for the embodiments of the present application.

[0068] See Figure 1 As shown, the embodiments of the present application provide an oil fume suction machine, which includes: a housing 100. The housing 100 can play a role in protection and aesthetics.

[0069] Wherein, the housing 100 is configured with an inner cavity. The inner cavity provides an installation space for components such as a throttling component 400 and a fan component 500.

[0070] Wherein, the housing 100 is configured with a first air inlet 110, and the first air inlet 110 is in communication with the inner cavity. The oil fume generated by the user during cooking enters the inner cavity through the first air inlet 110.

[0071] Specifically, the housing 100 includes a box body part 120 and a frame part 130 that are connected to each other. The box body part 120 and the frame part 130 together form an inner cavity.

[0072] In some other embodiments, the frame part 130 forms an inner cavity, and the box body part 120 is configured with a smoke collecting cavity. The inner cavity and the smoke collecting cavity are communicated through a first air inlet 110.

[0073] Among them, the frame part 130 is located at the top of the box body part 120. The first air inlet 110 is arranged at the bottom of the frame part 130.

[0074] The cooking fumes generated by the user during cooking enter the inner cavity from the smoke collecting cavity and the first air inlet 110, and are subsequently discharged into the flue outside the range hood.

[0075] In some embodiments, the range hood includes: an oil mesh assembly 200. The oil mesh assembly 200 can play a role in separating cooking fumes, thereby reducing the oil content entering the inner cavity.

[0076] Specifically, the oil mesh assembly 200 covers the first air inlet 110.

[0077] Among them, the oil mesh assembly 200 can be connected to the box body part 120 by snap fasteners or screws.

[0078] It should be noted that the oil mesh assembly 200 can be a commonly used oil mesh assembly in the related art, and will not be elaborated in this embodiment.

[0079] In some embodiments, the range hood includes: a smoke guide plate assembly 300.

[0080] The smoke guide plate assembly 300 is used to guide the cooking fumes to the first air inlet 110, reduce the diffusion of cooking fumes in the kitchen, and improve the smoke suction efficiency of the range hood. Moreover, the smoke guide plate assembly 300 can reduce the escape of cooking fumes during the suction process, ensure that more cooking fumes are sucked into the range hood, prevent the backflow of cooking fumes during the suction process, ensure that the cooking fumes are sucked away, and reduce the pollution of the kitchen environment by cooking fumes.

[0081] During use, the cooking fumes generated by the user during cooking enter the inner cavity through the oil mesh assembly 200 and the first air inlet 110 under the guiding action of the smoke guide plate assembly 300.

[0082] Specifically, the smoke guide plate assembly 300 is connected to the box body part 120 and is located on the side of the oil mesh assembly 200 away from the frame part 130.

[0083] In some embodiments, the smoke guide plate assembly 300 is connected to the box body part 120 by snap fasteners or screws.

[0084] Alternatively, in some embodiments, the smoke guide plate assembly 300 is rotatably connected to the housing 100.

[0085] In this way, the user can adjust the tilt angle of the smoke guide plate assembly 300 as needed. Alternatively, the control system can automatically control the tilt angle of the smoke guide plate assembly 300.

[0086] It should be noted that the smoke guide plate assembly 300 can be a common smoke guide plate assembly in the related art, and will not be elaborated herein in this embodiment.

[0087] In some embodiments, the range hood includes: a control system.

[0088] The control system is configured to control the operation of the fan assembly according to the user's selection.

[0089] Among them, the fan assembly is electrically connected to the control system.

[0090] In some embodiments, the housing 100 is configured with an electric control cavity, and the electric control cavity is separated from the inner cavity. Among them, at least part of the control system is arranged in the electric control cavity. In this way, it is beneficial to reduce the influence of oil fume on the control system.

[0091] In some embodiments, the control system includes a control panel, and the control panel is embedded in the box body part 120.

[0092] The control panel is the interface for the interaction of the range hood, and usually includes buttons, a touch screen or a knob, and is used to start and adjust various functions of the range hood, such as wind speed, lighting, timing, etc.

[0093] In some embodiments, the control system includes a controller.

[0094] The control panel is electrically connected to the controller. The controller is used to receive user input, execute corresponding instructions, and control each component of the range hood.

[0095] Among them, the controller is located in the electric control cavity.

[0096] In some embodiments, the control system further includes a plurality of sensors, such as a temperature sensor, a smoke sensor, an air quality sensor, etc.

[0097] Among them, the sensor is electrically connected to the controller.

[0098] Figure 2 It is a schematic structural diagram of the range hood provided by the embodiment of the present application after removing part of the housing. Figure 3 It is a schematic structural diagram of the throttle component and the fan component in the range hood provided by the embodiment of the present application. Figure 4 It is a schematic structural diagram of the throttle component and the fan component in the range hood provided by the embodiment of the present application from another angle. Figure 5 It is a schematic structural diagram of the throttle component and the fan component in the range hood provided by the embodiment of the present application from yet another angle.Figure 6 Structural schematic diagram of the throttling component in the range hood provided by the embodiment of the present application Figure 7 Another perspective structural schematic diagram of the throttling component in the range hood provided by the embodiment of the present application Figure 8 Front view of the throttling component in the range hood provided by the embodiment of the present application Figure 9 Rear view of the throttling component in the range hood provided by the embodiment of the present application Figure 10 Cross-sectional view of the throttling component in the range hood provided by the embodiment of the present application

[0099] See Figures 2 to 10 As shown, in some embodiments, the range hood includes: a throttling component 400. The throttling component 400 can be used to reduce the temperature of the cooking fumes.

[0100] Among them, the throttling component 400 is located inside the housing 100, that is to say, the throttling component 400 is located in the inner cavity.

[0101] Specifically, the throttling component 400 is located inside the frame part 130.

[0102] Among them, the throttling component 400 is connected to the housing 100. For example, it is connected by screws.

[0103] Alternatively, the throttling component 400 can be connected to the housing 100 through the fan component 500. For example, the throttling component 400 is connected to the fan component 500, and the fan component 500 is connected to the housing 100.

[0104] In some embodiments, the throttling component 400 is configured with a throttling air duct 410. The throttling air duct 410 is used for the flow of the cooking fumes.

[0105] In some embodiments, along the air flow direction, the flow area of the throttling air duct 410 gradually decreases.

[0106] Specifically, the throttling component 400 is configured with a second air inlet 420 communicating with the throttling air duct 410. The throttling component 400 is configured with a second air outlet 430 communicating with the throttling air duct 410. Along the second air inlet 420 to the second air outlet 430, the opening size of the throttling air duct 410 gradually decreases.

[0107] It can be understood that when a gas or liquid passes through a throttling orifice with a decreasing cross-sectional area, a throttling phenomenon will occur, reducing its pressure and temperature. The present application designs the throttling component 400 based on the throttling effect. When the user uses the range hood, the high-temperature cooking fumes are transported into the fan component from the first air inlet 110, the second air inlet 420, the throttling air duct 410, and the second air outlet 430. When the cooking fumes flow through the throttling air duct 410, a throttling phenomenon occurs, the temperature of the cooking fumes decreases, and the heat exchange between the cooking fumes and the fan component is reduced, thereby facilitating the reduction of the temperature rise of the motor component.

[0108] Moreover, the gradually decreasing flow area of the throttle air duct 410 is beneficial to making the air flow more smoothly, which is beneficial to improving the efficiency of the range hood.

[0109] See Figure 2 As shown, in some embodiments, the range hood includes: a fan assembly 500.

[0110] See Figure 2 As shown, after removing a part of the housing 100 from the back of the range hood, the fan assembly 500 is thus shown. The throttle assembly 400 is located on the front side of the outlet fan assembly 500. Among them, the front side is the side facing the user when the user uses it.

[0111] During operation, the cooking fumes enter the inner cavity of the frame part 130 from the first air inlet 110 at the bottom of the frame part 130. Under the action of the fan assembly 500, the air in the inner cavity, the cooking fumes flow along Figure 2 the direction indicated by the arrow in the figure towards the throttle assembly 400, enter the fan assembly 500 after being cooled by the throttle assembly 400, and then are discharged.

[0112] See Figures 2 to 10 As shown, the fan assembly 500 is located inside the housing 100, that is to say, the fan assembly 500 is located in the inner cavity.

[0113] Specifically, the throttle assembly 400 is located inside the frame part 130.

[0114] In some embodiments, the fan assembly 500 is configured to discharge the cooking fumes to the outside of the housing 100 through the throttle air duct 410 and the fan assembly 500 in sequence.

[0115] Specifically, under the action of the fan assembly 500, the cooking fumes are sequentially transported into the fan assembly 500 through the first air inlet 110, the second air inlet 420, the throttle air duct 410, and the second air outlet 430, and then the first air outlet is located outside the housing 100. For example, it can be discharged outdoors or into a flue.

[0116] See Figures 6 to 10 As shown, in some embodiments of the present application, the number of the throttle air ducts 410 is at least two, and the at least two throttle air ducts 410 are arranged at intervals. In this way, compared with only setting one throttle air duct 410, the air flow rate per unit time increases, which is beneficial to improving the air flow efficiency, and thus improving the oil fume suction effect.

[0117] In some embodiments of the present application, the number of the second air inlets 420 is at least two, the number of the second air outlets 430 is at least two, the second air inlets 420 are arranged in one-to-one correspondence with the throttle air ducts 410, and the second air outlets 430 are arranged in one-to-one correspondence with the throttle air ducts 410.

[0118] In some embodiments, there are multiple throttling air ducts 410, and the multiple throttling air ducts 410 are arranged at intervals. For example, the multiple throttling air ducts 410 are arranged in an array.

[0119] In some embodiments, the throttle air passage 410 extends in a straight line, so that the length of the throttle air passage 410 is shorter and the resistance to air circulation is smaller.

[0120] In some embodiments, the throttling air duct 410 extends in a curve, so that the arrangement of the throttling air duct 410 is more flexible.

[0121] See also Figures 2 to 10 As shown, in some embodiments of the present application, the throttle assembly 400 is connected to the fan assembly 500, and the second air outlet 430 of the throttle assembly 400 is opposite to the third air inlet 510 of the fan assembly 500. In this way, the second air outlet 430 is opposite to the third air inlet 510, which is conducive to the oil smoke entering the third air inlet 510 from the second air outlet 430, thereby facilitating the oil smoke to smoothly enter the fan assembly 500 from the throttle assembly 400.

[0122] In some embodiments, the throttle assembly 400 is inserted into the third air inlet 510 of the fan assembly 500. In this way, it is helpful to reduce the overflow of oil smoke from the gap between the throttle assembly 400 and the fan assembly 500.

[0123] In some embodiments of the present application, the end surface of the throttling assembly 400 abuts against the fan assembly 500, which is helpful to reduce the overflow of oil smoke from the gap between the throttling assembly 400 and the fan assembly 500.

[0124] It can be understood that the throttling assembly 400 and the fan assembly 500 can be connected by screws, or the throttling assembly 400 and the fan assembly 500 can be bonded.

[0125] In some embodiments of the present application, the throttling assembly 400 includes a first end surface 440, a second end surface 450 and a side surface 460 that are interconnected.

[0126] The first end surface 440 is opposite to the fan assembly 500 , the second end surface 450 is located on the side of the first end surface 440 away from the fan assembly 500 , the side surface 460 is located between the first end surface 440 and the second end surface 450 , the second air inlet 420 is located on the second end surface 450 , and the second air outlet 430 is located on the first end surface 440 .

[0127] The first end surface 440 abuts against the fan assembly 500. This helps to reduce the oil smoke from overflowing from the gap between the throttling assembly 400 and the fan assembly 500.

[0128] In some other embodiments, the side surface 460 is inserted into the third air inlet 510 of the fan assembly 500, and the first end surface 440 is located inside the fan assembly 500. In this way, it is beneficial to reduce the overflow of oil fume from the gap between the throttling assembly 400 and the fan assembly 500.

[0129] It should be noted that, in some embodiments, the throttling assembly 400 is a three-dimensional structure integrally provided. For example, a solid cylinder, a frustum of a cone, or a rectangular body. The throttling air duct 410 is formed by removing materials from the solid structure.

[0130] In another embodiment, the throttling assembly 400 includes a front plate, a rear plate, and a side plate that are connected to each other. The front plate, the rear plate, and the side plate form an installation space. A plurality of air duct structures are located in the installation space, and the plurality of air duct structures are arranged at intervals. The air duct structures are fixedly connected to the inner wall of the installation space. The air duct structures are configured with the throttling air duct 410.

[0131] See Figures 6 to 10 As shown, in some embodiments of the present application, the first end surface 440 is parallel to the second end surface 450.

[0132] Among them, the extending direction of the throttling air duct 410 has an included angle with the first end surface 440.

[0133] Specifically, the extending direction of the throttling air duct 410 is perpendicular to the first end surface 440. In this way, the length of the throttling air duct 410 is smaller, which is beneficial to reducing the resistance of air flow.

[0134] In some embodiments of the present application, the orthographic projection of the first end surface 440 on the plane where the second end surface 450 is located is located inside the second end surface 450. That is to say, the projection size of the first end surface 440 is smaller than the projection size of the second end surface 450.

[0135] It can be understood that the second air inlet 420 is located at the second end surface 450, and the second air outlet 430 is located at the first end surface 440. The opening size of the second air outlet 430 is smaller than that of the second air inlet 420, and the projection size of the first end surface 440 is smaller than the projection size of the second end surface 450. In this way, compared with the case where the projection size of the first end surface 440 is equal to the projection size of the second end surface 450, the number of the second air inlets 420 and the second air outlets 430 can be increased, and the number of the throttling air ducts 410 can be increased.

[0136] In some embodiments, the opening size of the second air outlet 430 is 0.25 - 0.75 times the opening size of the second air inlet 420. It should be noted that the opening size is the area available for air circulation.

[0137] It can be understood that when the opening size of the second air outlet 430 is less than 0.25 times the opening size of the second air inlet 420, the throttling and cooling effect of the throttling component 400 is better. However, the resistance to air flow is relatively large, and the oil fume exhaust efficiency of the range hood is relatively low.

[0138] When the opening size of the second air outlet 430 is greater than 0.75 times the opening size of the second air inlet 420, the resistance to air flow is relatively small, and the oil fume exhaust efficiency of the range hood is relatively high. However, the throttling and cooling effect of the throttling component 400 is relatively poor.

[0139] Exemplarily, the opening size of the second air outlet 430 is 0.5 times the opening size of the second air inlet 420. The opening size of the second air outlet 430 is 0.6 times the opening size of the second air inlet 420.

[0140] Specifically, the second air outlet 430 can be circular, and the second air inlet 420 can be circular. The diameter of the second air inlet 420 is greater than the diameter of the second air outlet 430. In this way, compared with other shapes, the processing difficulty is relatively small.

[0141] Specifically, the second air outlet 430 can be square, and the second air inlet 420 can be square. The side length of the second air inlet 420 is greater than the side length of the second air outlet 430.

[0142] It should be noted that the shape of the second air outlet 430 can be set according to the shape of the first end face 440, and the shape of the second air outlet 430 is the same as the shape of the first end face 440. In this way, it is beneficial to increase the number of the second air outlets 430. For example, if the first end face 440 is circular, then the shape of the second air outlet 430 is circular. If the first end face 440 is rectangular, then the shape of the second air outlet 430 is rectangular.

[0143] The shape of the second air inlet 420 can be set according to the shape of the second end face 450, and the shape of the second air inlet 420 is the same as the shape of the second end face 450. In this way, it is beneficial to increase the number of the second air inlets 420. For example, if the second end face 450 is circular, then the shape of the second air inlet 420 is circular. If the second end face 450 is rectangular, then the shape of the second air inlet 420 is rectangular.

[0144] In some embodiments, for the convenience of processing and to reduce the resistance to air flow, the cross-sectional shapes of the second air outlet 430, the second air inlet 420, and the throttling air duct 410 are the same. For example, the cross-sectional shapes of the second air outlet 430, the second air inlet 420, and the throttling air duct 410 are all circular. Or, the cross-sectional shapes of the second air outlet 430, the second air inlet 420, and the throttling air duct 410 are all elliptical.

[0145] Figure 11The structural schematic diagram of the fan assembly in the range hood provided by the embodiment of the present application. Figure 12 The structural schematic diagram of the fan assembly in the range hood provided by the embodiment of the present application after removing part of the volute.

[0146] See Figures 3 to 5 、 Figure 11 and Figure 12 As shown in

[0147] In some embodiments of the present application, the fan assembly 500 includes a volute 520, a motor 530 and an impeller 540 located inside the volute 520. The motor 530 is connected to the volute 520, and the impeller 540 is connected to the motor 530.

[0148] Among them, the motor 530 and the volute 520 can be connected by screws.

[0149] Specifically, the volute 520 can be connected to the housing 100 by screws or snapped by a buckle.

[0150] It can be understood that by setting the volute 520, the air flow path is optimized, the air flow resistance is reduced, and the efficiency of the motor 530 is improved. The shape of the volute 520 helps to smoothly guide the air flow, thereby reducing energy loss. Moreover, it helps to reduce the noise during operation. The smooth air flow path and the optimized structural design can reduce the air flow noise and mechanical noise.

[0151] It should be noted that the structure of the volute 520 can be the same as that in the related art, where the air cavity gradually increases along the air flow direction, and this embodiment will not be elaborated here.

[0152] In some embodiments, the volute 520 is configured with a third air inlet 510 and a first air outlet 521, and the first air outlet 521 is communicated with the outside of the housing 100.

[0153] Among them, the third air inlet 510 is located on the side of the volute 520 facing the throttling component 400. The first air outlet 521 is located at the top of the volute 520.

[0154] During operation, the motor 530 drives the impeller 540 to rotate. The rotation of the impeller 540 causes the oil fume to enter the volute 520 through the first air inlet 110, the second air inlet 420, the throttling air duct 410, the second air outlet 430, and the third air inlet 510, and then flows to the outside of the housing 100 through the first air outlet 521.

[0155] Exemplarily, the first cover plate 522, the second cover plate 523, and the surrounding plate 524 can be connected by rivets.

[0156] In some embodiments, the third air inlet 510 is provided on the first cover plate 522. The first end face 440 of the throttle assembly 400 abuts against the first cover plate 522. The throttle assembly 400 and the first cover plate 522 are connected by screws.

[0157] In some embodiments, the shape of the third air inlet 510 is the same as the shape of the first end face 440. In this way, it is beneficial to reduce the wind resistance and improve the efficiency of air flow. For example, when the shape of the third air inlet 510 is circular, the shape of the first end face 440 is circular. When the shape of the third air inlet 510 is rectangular, the shape of the first end face 440 is rectangular.

[0158] In some embodiments, when the shape of the third air inlet 510 is circular, the shape of the first end face 440 is circular. The throttle assembly 400 is in the shape of a frustum of a cone.

[0159] See Figure 11 and Figure 12 As shown in

[0160] In some embodiments, the extension member 550 can be riveted or connected to the volute 520 by screws. Alternatively, the extension member 550 and the volute 520 can be welded.

[0161] In some embodiments, the side of the extension member 550 facing away from the volute 520 is located outside the housing 100, so that the oil fume can be smoothly discharged to the outside of the housing 100.

[0162] In some embodiments, the extension member 550 can be a check valve.

[0163] During operation, the motor 530 drives the impeller 540 to rotate. The rotation of the impeller 540 causes the oil fume to enter the volute 520 through the first air inlet 110, the second air inlet 420, the throttle air duct 410, the second air outlet 430, and the third air inlet 510, and then flows to the outside of the housing 100 through the first air outlet 521 and the extension member 550.

[0164] In some embodiments of the present application, it further includes a sound-absorbing member (not shown in the figure). The sound-absorbing member is provided on the inner wall of the throttle air duct 410. During the flow of the gas in the throttle air duct 410, the sound-absorbing member can reduce the aerodynamic noise caused by the reduction of the cross-sectional area of the throttle air duct 410.

[0165] Moreover, the sound-absorbing member can increase the wall surface roughness of the inner wall of the throttling air duct 410, increase the resistance between the wall surface and the oil fume, convert more potential energy of the oil fume into work against the resistance, and further reduce the temperature of the oil fume.

[0166] Specifically, the sound-absorbing member can be connected by an adhesive method.

[0167] In some embodiments of the present application, the sound-absorbing members are arranged in one-to-one correspondence with the throttling air ducts 410. That is to say, sound-absorbing members are arranged in each throttling air duct 410, and the total area of the sound-absorbing members is relatively large, which is beneficial to improving the noise reduction and temperature reduction effects.

[0168] It should be noted that the sound-absorbing member can be a porous sound-absorbing member.

[0169] Exemplarily, the material of the sound-absorbing member can be glass wool, mineral wool, polyester fiber board, foam material, foam aluminum, or ceramic fiber, etc.

[0170] In some embodiments, the material of the sound-absorbing member can be melamine. In this way, the sound-absorbing member has a good flame retardant effect and a good sound absorption effect.

[0171] In some embodiments of the present application, the sound-absorbing members are evenly distributed on the inner wall of the throttling air duct 410. In this way, the area of the sound-absorbing members is relatively large, which is beneficial to improving the noise reduction and temperature reduction effects.

[0172] In some embodiments of the present application, the thickness of the sound-absorbing member is 1-4 mm. For example, the thickness of the sound-absorbing member is 2 mm or the thickness of the sound-absorbing member is 3 mm.

[0173] It can be understood that when the thickness of the sound-absorbing member is less than 1 mm, the noise reduction effect of the sound-absorbing member is poor.

[0174] When the thickness of the sound-absorbing member is greater than 4 mm, the thickness of the sound-absorbing member is relatively large, occupying a relatively large space, the ventilation volume of the throttling air duct 410 per unit time is reduced, and the efficiency of the range hood for exhausting oil fume is relatively low.

[0175] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0176] For ease of explanation, the above description has been presented in connection with specific embodiments. However, the foregoing exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations are possible in light of the above teachings. The selection and description of the above embodiments were made to better explain the principles and the practical application, so that those skilled in the art can better use the embodiments and various different variations suitable for specific use considerations.

Claims

1. A range hood, characterized in that: include: A housing (100), the housing (100) being configured with an inner cavity, the housing (100) being configured with a first air inlet (110), the first air inlet (110) being in communication with the inner cavity; A throttling assembly (400), the throttling assembly (400) being located in the inner cavity, the throttling assembly (400) being configured with a throttling air duct (410), the throttling assembly (400) being configured with a second air inlet (420) and a second air outlet (430) being connected to the throttling air duct (410), and the opening size of the throttling air duct (410) gradually decreasing from the second air inlet (420) to the second air outlet (430); A fan assembly (500), wherein the fan assembly (500) is located in the inner cavity, and the fan assembly (500) is configured to transport the oil smoke into the fan assembly (500) through the first air inlet (110), the second air inlet (420), the throttling air duct (410), and the second air outlet (430) in sequence.

2. The range hood according to claim 1, characterized in that: The number of the throttling air ducts (410) is at least two, and at least two of the throttling air ducts (410) are arranged at intervals; The number of the second air inlets (420) is at least two, the number of the second air outlets (430) is at least two, the second air inlets (420) are arranged in a one-to-one correspondence with the throttling air ducts (410), and the second air outlets (430) are arranged in a one-to-one correspondence with the throttling air ducts (410).

3. The range hood according to claim 1, characterized in that: The throttling component (400) is connected to the fan component (500), and the second air outlet (430) of the throttling component (400) is opposite to the third air inlet (510) of the fan component (500).

4. The range hood according to claim 3, characterized in that: The throttling assembly (400) comprises a first end face (440), a second end face (450) and a side face (460) which are connected to each other, the first end face (440) is opposite to the fan assembly (500), the second end face (450) is located on a side of the first end face (440) away from the fan assembly (500), the side face (460) is located between the first end face (440) and the second end face (450), the second air inlet (420) is located on the second end face (450), and the second air outlet (430) is located on the first end face (440); The first end surface (440) abuts against the fan assembly (500).

5. The range hood according to claim 4, characterized in that: The first end surface (440) is parallel to the second end surface (450), and the extension direction of the throttling air duct (410) is perpendicular to the first end surface (440).

6. The range hood according to claim 4, characterized in that: The orthographic projection of the first end surface (440) toward the plane where the second end surface (450) is located is located within the second end surface (450).

7. The range hood according to claim 3, characterized in that: The fan assembly (500) comprises a volute (520), and a motor (530) and an impeller (540) located in the volute (520), wherein the motor (530) is connected to the volute (520), and the impeller (540) is connected to the motor (530); The volute (520) is configured with the third air inlet (510) and the first air outlet (521), and the first air outlet (521) is connected to the outside of the housing (100); The fan assembly (500) is configured to transport the oil smoke to the outside of the shell (100) through the first air inlet (110), the second air inlet (420), the throttling air duct (410), the second air outlet (430), the fan assembly (500) and the first air outlet (521) in sequence.

8. The range hood according to any one of claims 1 to 7, characterized in that: It also includes a sound absorbing component, which is arranged on the inner wall of the throttling air duct (410).

9. The range hood according to claim 8, characterized in that: The sound absorbing member is arranged in one-to-one correspondence with the throttling air duct (410); And / or, the sound absorbing components are evenly distributed on the inner wall of the throttling air duct (410).

10. A range hood, characterized in that: include: Housing (100); A throttling assembly (400), the throttling assembly (400) being located in the housing (100), and the throttling assembly (400) being configured with a throttling air duct (410); A fan assembly (500), the fan assembly (500) being located in the housing (100), and the fan assembly (500) being arranged to discharge the oil smoke to the outside of the housing (100) through the throttling air duct (410) and the fan assembly (500) in sequence; Along the air flow direction, the flow area of ​​the throttling air duct (410) gradually decreases.

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