Range hood

Abstract

The utility model relates to the technical field of kitchen appliances, and provides a range hood which comprises a box body, and the box body is provided with a mounting cavity; the fan assembly is located in the mounting cavity and comprises a volute, and the volute is connected with the box body; the impeller is rotationally connected with the volute; the magnetic coupling comprises a driving structure; a distance is formed between the driven structure and the driving structure, and the driven structure is connected with the impeller; the motor comprises a motor body; the driving shaft is connected with the motor body, and the driving shaft is connected with the driving structure; the motor drives the driving structure to rotate, the driving structure drives the driven structure to rotate under the action of magnetic force, and the driven structure drives the impeller to rotate. The range hood provided by the utility model is relatively low in noise during operation.

Description

TECHNICAL FIELD

[0001] The present application relates to kitchen electrical technology. In particular, it relates to an extractor hood. BACKGROUND

[0002] An extractor hood, also known as a range hood, is an electrical appliance installed in the kitchen for purifying air. Its main function is to remove oil fumes, steam and odors generated during cooking from above the stove by a mechanical fan and discharge them to the outside or recycle them to the indoor after purification by a filtering system.

[0003] In the related art, the extractor hood includes a box body and a fan assembly located in the box body. The fan assembly includes a volute, an impeller and a motor. The motor is connected with the volute, the motor shaft of the motor is connected with the impeller, the impeller is rotationally connected with the volute, and the motor drives the impeller to rotate relative to the volute.

[0004] However, the extractor hood generates a large noise during operation. CONTENT OF THE INVENTION

[0005] The present application provides an extractor hood, which generates a smaller noise during operation.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] The present application provides an extractor hood, which includes:

[0008] The box body is provided with a mounting cavity;

[0009] The fan assembly is located in the mounting cavity, and the fan assembly includes:

[0010] The volute is connected with the box body;

[0011] The impeller is rotationally connected with the volute:

[0012] The magnetic coupling includes:

[0013] The driving structure;

[0014] The driven structure has a spacing with the driving structure, and the driven structure is connected with the impeller;

[0015] The motor includes:

[0016] The motor body;

[0017] The driving shaft is connected with the motor body, and the driving shaft is connected with the driving structure;

[0018] The motor drives the driving structure to rotate, the driving structure drives the driven structure to rotate through magnetic force, and the driven structure drives the impeller to rotate.

[0019] The range provides the range of the range, including the box and the fan assembly in the box, wherein the fan assembly includes volute, impeller, magnetic coupling and motor. The magnetic coupling includes driving structure and driven structure, the driving structure and the driven structure have a spacing, the driven structure is connected with the impeller, the driving shaft of the motor is connected with the driving structure head, the motor drives the driving structure to rotate, the driving structure drives the driven structure to rotate through the magnetic force, and the driven structure drives the impeller to rotate. Because the driven structure and the driving structure have a spacing, the motor and the impeller can be separated, so as to facilitate avoiding the superposition of vibration of the two, and facilitating reducing noise.

[0020] In some embodiments, the motor body is connected with the box, and the motor body has a spacing with the volute.

[0021] Compared with the connection between the motor body and the volute, the overall mass of the box is larger, and the box is not easy to vibrate when the motor operates. Moreover, the thickness of the volute is smaller, the connection between the motor body and the box is more firm. Moreover, the motor body and the volute have a spacing, and the vibration of the motor is not easy to transfer to the volute.

[0022] In some embodiments, the volute is provided with an inner cavity, and the impeller is located in the inner cavity;

[0023] The volute is provided with a first air inlet structure and a second air inlet structure, the first air inlet structure and the second air inlet structure are communicated with the inner cavity, and the first air inlet structure and the second air inlet structure are oppositely arranged along the axial direction of the impeller;

[0024] Along the radial direction of the impeller, the motor body is located on the side of the volute away from the impeller.

[0025] In this way, along the axial direction of the impeller, the space occupied by the fan assembly can be smaller, so as to facilitate reducing the size of the range along the axial direction of the impeller.

[0026] In some embodiments, the axial direction of the driving structure is perpendicular to the axial direction of the driven structure.

[0027] In this way, the power transmission direction can be changed, the motor body is arranged on the side of the volute away from the impeller along the radial direction of the impeller, so as to facilitate reducing the size of the range along the axial direction of the impeller.

[0028] In some embodiments, the driving structure includes:

[0029] The first body is connected with the driving shaft;

[0030] A plurality of first magnetic members are arranged on the periphery of the first body;

[0031] A plurality of second magnetic members are arranged on the periphery of the first body, and the plurality of second magnetic members and the plurality of first magnetic members are alternately arranged along the circumferential direction of the first body.

[0032] The first magnetic member and the second magnetic member are opposite in magnetism.

[0033] In this way, the driving structure is simple and occupies less space.

[0034] In some embodiments, the driven structure comprises:

[0035] a second body connected with the impeller;

[0036] a plurality of third magnetic members arranged at an end of the second body facing the driving structure;

[0037] a plurality of fourth magnetic members arranged at the end of the second body facing the driving structure, the plurality of third magnetic members and the plurality of fourth magnetic members being arranged alternately along a circumferential direction of the second body;

[0038] The third magnetic member and the fourth magnetic member are opposite in magnetism.

[0039] In this way, the driven structure is simple and occupies less space.

[0040] In some embodiments, the driving structure is located at a side of the third magnetic member and the fourth magnetic member away from the second body;

[0041] The first magnetic member has a spacing with the third magnetic member and a spacing with the fourth magnetic member;

[0042] The second magnetic member has a spacing with the third magnetic member and a spacing with the fourth magnetic member.

[0043] In this way, it is beneficial to ensure that the driving structure and the driven structure are not in contact.

[0044] In some embodiments, an extending direction of the first magnetic member is parallel to an extending direction of the second magnetic member, and the extending direction of the second magnetic member is parallel to an axial direction of the first body.

[0045] In this way, the number of arrangements of the first magnetic member and the second magnetic member can be more.

[0046] In some embodiments, an extending direction of the third magnetic member is consistent with a radial direction of the second body;

[0047] An extending direction of the fourth magnetic member is consistent with the radial direction of the second body.

[0048] In this way, the number of arrangements of the third magnetic member and the fourth magnetic member can be more.

[0049] In some embodiments, an end surface of the first body away from the motor is coincident with an axis of the second body.

[0050] Thus, the active structure is not easy to affect the two magnetic members radially opposite to the second body during rotation, thereby affecting the rotation of the driven structure. BRIEF DESCRIPTION OF DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0052] Figure 1 The structure schematic diagram of the range hood provided by the embodiment of the present application is shown in the figure.

[0053] Figure 2 The structure schematic diagram of the range hood provided by the embodiment of the present application is shown in the figure.

[0054] Figure 3 The structure schematic diagram of the range hood provided by the embodiment of the present application is shown in the figure.

[0055] Figure 4 The structure schematic diagram of the range hood provided by the embodiment of the present application is shown in the figure.

[0056] Figure 5 The structure schematic diagram of the range hood provided by the embodiment of the present application is shown in the figure. Figure 4 The structure schematic diagram of the range hood provided by the embodiment of the present application is shown in the figure.

[0057] Figure 6 The structure schematic diagram of the range hood provided by the embodiment of the present application is shown in the figure. Figure 4 The structure schematic diagram of the range hood provided by the embodiment of the present application is shown in the figure.

[0058] Figure 7 The structure schematic diagram of the range hood provided by the embodiment of the present application is shown in the figure.

[0059] Figure 8 The structure schematic diagram of the range hood provided by the embodiment of the present application is shown in the figure.

[0060] Figure 9 The structure schematic diagram of the range hood provided by the embodiment of the present application is shown in the figure.

[0061] Figure 10 The structure schematic diagram of the range hood provided by the embodiment of the present application is shown in the figure. Figure 7 The structure schematic diagram of the range hood provided by the embodiment of the present application is shown in the figure.

[0062] Explanation of reference signs:

[0063] 100 - cabinet; 110 - first cabinet; 120 - second cabinet;

[0064] 200 - fan assembly; 210 - volute; 211 - first air inlet structure; 212 - second air inlet structure; 220 - impeller; 230 - first bracket; 240 - magnetic coupling; 241 - driving structure; 2411 - first body; 2412 - first magnetic part; 2413 - second magnetic part; 242 - driven structure; 2421 - second body; 2422 - third magnetic part; 2423 - fourth magnetic part; 250 - motor; 251 - motor body; 252 - driving shaft; 253 - extension shaft; 260 - second bracket;

[0065] 300 - control panel;

[0066] 400 - oil screen assembly;

[0067] 500 - smoke deflector assembly;

[0068] 600 - oil cup. DETAILED DESCRIPTION

[0069] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application. The embodiments described below and the features in the embodiments can be combined with each other without conflict.

[0070] In the related art, the range hood includes a box body and a fan assembly located in the box body. The fan assembly includes a volute, an impeller and a motor. The motor is connected with the volute, the motor shaft of the motor is connected with the impeller, the impeller is rotationally connected with the volute, and the motor drives the impeller to rotate relative to the volute. Since the motor rotation and the impeller rotation are both prone to vibration, the motor shaft of the motor is directly connected with the impeller and in contact with each other, and the vibration of the two is prone to superposition, thereby generating a larger noise.

[0071] In order to overcome the defects in the related art, the range hood provided by the present application includes a box body and a fan assembly located in the box body. The fan assembly includes a volute, an impeller, a magnetic coupling and a motor. The magnetic coupling includes a driving structure and a driven structure. The driving structure and the driven structure have a spacing. The driven structure is connected with the impeller. The driving shaft of the motor is connected with the head of the driving structure. The motor drives the driving structure to rotate. The driving structure drives the driven structure to rotate through magnetic force. The driven structure drives the impeller to rotate. Since the driven structure and the driving structure have a spacing, the motor and the impeller can be separated, thereby being conducive to avoiding the superposition of the vibration of the two and being conducive to reducing the noise.

[0072] The content of the present application will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can have a clearer and more detailed understanding of the content of the present application.

[0073] The present application provides a range hood. The range hood can be a top suction type range hood, a side suction type range hood, or a top and side dual suction type range hood. Moreover, the range hood can be a standalone range hood, or can be integrated with a cooking appliance.

[0074] Figure 1 A structural schematic diagram of a range hood provided by an embodiment of the present application is shown in Figure 2 A structural schematic diagram of a range hood provided by an embodiment of the present application is shown in Figure 3 A structural schematic diagram of a range hood provided by an embodiment of the present application is shown in

[0075] Referring to Figures 1 to 3 As shown in the drawings, in some embodiments, the range hood includes a box body 100. The box body 100 can provide mounting space for other components and play a protective role.

[0076] The box body 100 is provided with a mounting cavity.

[0077] The box body 100 is provided with an air inlet, which is in communication with the mounting cavity. The air inlet is used to suck in oil fumes.

[0078] In some embodiments, the box body 100 includes a plurality of plate members that are connected to each other. Exemplarily, the plurality of plate members can be connected by riveting.

[0079] In some embodiments, the box body 100 includes a first box body 110 and a second box body 120 that are in communication with each other. The first box body 110 is located on top of the second box body 120.

[0080] In some embodiments, the range hood includes a fan assembly 200. The fan assembly 200 is used to generate negative pressure, so as to discharge oil fumes into a flue.

[0081] The fan assembly 200 is located in the mounting cavity.

[0082] Specifically, the fan assembly 200 is arranged in the first box body 110, and the fan assembly 200 can be connected to the first box body 110 by screws or other fasteners.

[0083] Under the action of the fan assembly 200, oil fumes in the kitchen can enter the inner cavities of the second box body 120 and the first box body 110 through the air inlet.

[0084] In some embodiments, the range hood includes a control panel 300. A user can control the operation of the range hood through the control panel 300.

[0085] The control panel 300 can be embedded on the cabinet 100. Specifically, the control panel 300 can be embedded on the front side of the second cabinet 120. The front side is the side facing the user.

[0086] In some embodiments, the range hood includes an oil screen assembly 400. The oil screen assembly 400 is used to filter oil fume.

[0087] The oil screen assembly 400 is arranged on the air inlet, and the oil screen assembly 400 is connected with the second cabinet 120. For example, the oil screen assembly 400 can be connected with the second cabinet 120 by screws.

[0088] In some embodiments, the range hood includes a smoke guide plate assembly 500. The smoke guide plate assembly is used to guide the oil fume into the air inlet, thereby improving the effect of the range hood.

[0089] The smoke guide plate assembly 500 is connected with the cabinet 100. The smoke guide plate assembly 500 is arranged on the air inlet.

[0090] Specifically, the smoke guide plate assembly 500 can be connected with the second cabinet 120 by screws.

[0091] In some embodiments, the range hood includes an oil cup 600. The oil cup 600 is used to receive oil stains in the cabinet 100.

[0092] The oil cup 600 is arranged at the bottom of the cabinet 100 and communicates with the cabinet 100.

[0093] Figure 4 The structure schematic diagram of the fan assembly in the range hood provided by the embodiments of the present application, Figure 5 The structure schematic diagram of the fan assembly in the range hood provided by the embodiments of the present application, Figure 4 The structure schematic diagram of the fan assembly in the range hood provided by the embodiments of the present application, Figure 6 The structure schematic diagram of the fan assembly in the range hood provided by the embodiments of the present application, Figure 4 The structure schematic diagram of the fan assembly in the range hood provided by the embodiments of the present application.

[0094] Referring to FIG. 1, Figures 4 to 6 In some embodiments, the fan assembly 200 includes a volute 210.

[0095] The volute 210 is connected with the cabinet 100.

[0096] Specifically, the volute 210 can be connected with the first cabinet 110 by screws.

[0097] In some embodiments, the volute 210 includes a first cover plate, a second cover plate and a side plate. The first cover plate and the second cover plate are arranged oppositely, and the side plate is located between the first cover plate and the second cover plate. The side plate is connected with the first cover plate and connected with the second cover plate.

[0098] For example, the first cover plate, the second cover plate and the side plate can be riveted or welded.

[0099] In some embodiments, the fan assembly 200 comprises an impeller 220.

[0100] The impeller 220 is rotationally connected to the volute 210.

[0101] Specifically, the impeller 220 can be rotationally connected to a first support 230, and the first support 230 is connected to the volute 210.

[0102] In some embodiments, the impeller 220 is fixed on an impeller shaft by a limiting pin and a locking nut, and the impeller shaft is fixed on the volute 210 by the first support 230.

[0103] Referring to Figures 4 to 6 In some embodiments, the fan assembly 200 comprises a magnetic coupling 240. The magnetic coupling 240 is used to connect the motor and the impeller 220.

[0104] In some embodiments, the fan assembly 200 comprises a motor 250. The motor 250 is used to drive the impeller 220 to rotate, thereby generating negative pressure in the volute 210.

[0105] Figure 7 The structure diagram of the magnetic coupling in the range hood provided by the embodiments of the present application is shown.

[0106] Referring to Figure 6 and Figure 7 In some embodiments, the magnetic coupling 240 comprises a driving structure 241. The driving structure 241 is used to be connected to the motor 250.

[0107] In some embodiments, the magnetic coupling 240 comprises a driven structure 242.

[0108] The driven structure 242 is connected to the impeller 220, and has a spacing with the driving structure 241.

[0109] In some embodiments, the circumferential surface of the driving structure 241 is parallel to the end surface of the driven structure 242, and there is a certain spacing between them.

[0110] In some embodiments, the driven structure 242 is fixed to the impeller 220 in the circumferential direction by a shaft hole male-female matching structure, and is fixed in the axial direction by a stop screw.

[0111] Referring to Figure 6 In some embodiments, the motor 250 comprises a motor body 251.

[0112] In some embodiments, the motor 250 comprises a driving shaft 252.

[0113] The driving shaft 252 is connected with the motor body 251, and the driving shaft 252 is connected with the driving structure 241.

[0114] The motor drives the driving structure 241 to rotate, the driving structure 241 drives the driven structure 242 to rotate through magnetic force, and the driven structure 242 drives the impeller 220 to rotate.

[0115] It should be noted that the extension shaft 253 is also included in some embodiments, the extension shaft 253 is connected with the driving shaft 252, and the extension shaft 253 is connected with the driving structure 241.

[0116] The range hood provided in the present application comprises a box body 100 and a fan assembly 200 located in the box body 100, wherein the fan assembly 200 comprises a volute 210, an impeller 220, a magnetic coupling 240 and a motor 250. The magnetic coupling 240 comprises a driving structure 241 and a driven structure 242, the driving structure 241 has a spacing with the driven structure 242, the driven structure 242 is connected with the impeller 220, a driving shaft 252 of the motor 250 is connected with the driving structure 241, the motor 250 drives the driving structure 241 to rotate, the driving structure 241 drives the driven structure 242 to rotate through magnetic force, and the driven structure 242 drives the impeller 220 to rotate. Since the driven structure 242 has a spacing with the driving structure 241, the motor 250 and the impeller 220 can be separated, thereby facilitating the avoidance of the superposition of vibrations of the two and the reduction of noise.

[0117] Moreover, the motor 250 and the impeller 220 do not contact with each other, do not produce abrasion, reduce the vibration caused by manufacturing and installation errors, and reduce working noise.

[0118] In some embodiments, the motor body 251 is connected with the box body 100, and the motor body 251 has a spacing with the volute 210.

[0119] It can be understood that, compared with the connection between the motor body 251 and the volute 210, since the overall mass of the box body 100 is larger, the box body 100 is not easy to vibrate when the motor 250 operates. Moreover, the thickness of the volute 210 is smaller, and the motor body 251 is connected with the box body 100, so that the connection is more firm.

[0120] It can be understood that the motor body 251 has a spacing with the volute 210, and the vibration of the motor 250 is not easy to be transmitted to the volute 210.

[0121] In some embodiments, the motor body 251 is connected with the box body 100 through a second support 260.

[0122] It should be noted that the position of the motor 250 can be set according to requirements, thereby facilitating the more compact structure of the whole machine and the more reasonable structure layout.

[0123] Referring to Figure 4 and Figure 5 As shown in FIG. 1, in some embodiments, the volute 210 is provided with an inner cavity, and the impeller 220 is located in the inner cavity.

[0124] The volute 210 is provided with a first air inlet structure 211 and a second air inlet structure 212, and the first air inlet structure 211 and the second air inlet structure 212 are oppositely arranged along the axial direction of the impeller 220. The first air inlet structure 211 and the second air inlet structure 212 are in communication with the inner cavity of the volute 210.

[0125] The motor 250 is used to drive the impeller 220 to rotate, so as to generate negative pressure in the volute 210, and the oil fume enters the volute 210 through the first air inlet structure 211 and the second air inlet structure 212. In this way, the volute 210 can have bidirectional air inlet, and the oil fume suction efficiency is relatively high.

[0126] The motor body 251 is located on the side of the volute 210 away from the impeller 220 along the radial direction of the impeller 220. In this way, the space occupied by the fan assembly 200 along the axial direction of the impeller 220 can be relatively small, thereby being beneficial to reducing the size of the range hood along the axial direction of the impeller 220.

[0127] It should be noted that the axial direction of the impeller 220 is consistent with the depth direction of the cabinet 100, thereby being beneficial to reducing the size of the range hood along the depth direction of the cabinet 100. The depth direction of the cabinet 100 is the direction indicated by the Y axis in FIG. 1. Figure 1

[0128] It can be understood that, compared with the motor 250 covering part of the first air inlet structure 211 or the second air inlet structure 212 in the related art, in the embodiment, the motor body 251 is located outside the volute 210, and the motor body 251 is located on the side of the volute 210 away from the impeller 220 along the radial direction of the impeller 220. The motor body 251 is not easy to block the first air inlet structure 211 or the second air inlet structure 212, thereby being beneficial to increasing the air inlet area of the volute 210 and reducing the smoke suction resistance.

[0129] In some embodiments, the axial direction of the driving structure 241 is perpendicular to the axial direction of the driven structure 242. In this way, the power transmission direction can be changed, the motor body 251 can be arranged on the side of the volute 210 away from the impeller 220 along the radial direction of the impeller 220, thereby being beneficial to reducing the size of the range hood along the axial direction of the impeller 220.

[0130] Figure 8 The structure diagram of the driving structure in the range hood provided by the embodiment of the present application is shown.

[0131] In some embodiments, the driving structure 241 includes a first body 2411. ​

[0132] The first body 2411 is connected to the drive shaft 252.

[0133] The active structure 241 includes a plurality of first magnetic elements 2412.

[0134] Multiple first magnetic elements 2412 are disposed around the periphery of the first body 2411;

[0135] The active structure 241 includes multiple second magnetic elements 2413.

[0136] A plurality of second magnetic elements 2413 are disposed on the periphery of the first body 2411, and the plurality of second magnetic elements 2413 and a plurality of first magnetic elements 2412 are alternately disposed along the circumference of the first body 2411. The first magnetic elements 2412 and the second magnetic elements 2413 have opposite magnetic properties.

[0137] It should be noted that one of the first magnetic component 2412 and the second magnetic component 2413 is the N pole and the other is the S pole.

[0138] Figure 9 This is a schematic diagram of the driven structure in the range hood provided in the embodiment of this application.

[0139] See Figure 9 As shown, in some embodiments, the driven structure 242 includes a second body 2421.

[0140] The second body 2421 is connected to the impeller 220.

[0141] In some embodiments, the driven structure 242 includes a plurality of third magnetic elements 2422.

[0142] Multiple third magnetic elements 2422 are disposed at the ends of the second body 2421 facing the active structure 241.

[0143] In some embodiments, the extending direction of the first magnetic element 2412 is parallel to the extending direction of the second magnetic element 2413, and the extending direction of the second magnetic element 2413 is parallel to the axial direction of the first body 2411.

[0144] In this way, the number of first magnetic components 2412 and second magnetic components 2413 can be relatively large.

[0145] In some embodiments, the driven structure 242 includes a plurality of fourth magnetic elements 2423.

[0146] Multiple fourth magnetic elements 2423 are disposed at the end of the second body 2421 facing the active structure 241, and multiple third magnetic elements 2422 and multiple fourth magnetic elements 2423 are alternately disposed along the circumference of the second body 2421.

[0147] The third magnetic member 2422 and the fourth magnetic member 2423 are opposite in magnetism. One of the third magnetic member 2422 and the fourth magnetic member 2423 is N-pole, and the other is S-pole.

[0148] In some embodiments, the extending direction of the third magnetic member 2422 is consistent with the radial direction of the second body 2421.

[0149] The extending direction of the fourth magnetic member 2423 is consistent with the radial direction of the second body 2421.

[0150] In this way, the number of arrangements of the third magnetic member 2422 and the fourth magnetic member 2423 can be more.

[0151] Referring to FIGS. 1, 2 and 3, Figure 8 and Figure 9 In some embodiments, the driving structure 241 is located on the side of the third magnetic member 2422 and the fourth magnetic member 2423 away from the second body 2421.

[0152] The first magnetic member 2412 has a spacing with the third magnetic member 2422 and has a spacing with the fourth magnetic member 2423.

[0153] The second magnetic member 2413 has a spacing with the third magnetic member 2422 and has a spacing with the fourth magnetic member 2423.

[0154] In this way, it is beneficial to ensure that the driving structure 241 and the driven structure 242 are not in contact.

[0155] In some embodiments, the end surface of the first body 2411 away from the motor 250 is coincident with the axis of the second body 2421.

[0156] In this way, during the rotation of the driving structure 241, it is not easy to affect the two magnetic members of the second body 2421 in the radial direction, thereby affecting the rotation of the driven structure 242.

[0157] It should be noted that the size of the driving structure 241 and the driven structure 242 can be set according to the need of the transmission ratio.

[0158] In some embodiments, the first magnetic member 2412 and the second magnetic member 2413 can be arranged on the end surface of the first body 2411. The third magnetic member 2422 and the fourth magnetic member 2423 can be arranged on the circumferential side of the second body 2421.

[0159] The working process of the magnetic coupling 240 will be described below:

[0160] Referring to FIGS. 1, 2 and 3, Figure 7 The working process of the magnetic coupling 240 can be divided into four states:

[0161] State 1: The driving structure 241 rotates, and one N-pole magnet on the periphery of the driving structure 241 gradually approaches the end face of the driven structure 242 in the direction of rotation, attracting the S-pole magnet on the end face of the driven structure 242. One S-pole magnet on the periphery of the driving structure 241 gradually moves away from the end face of the driven structure 242 in the direction of rotation, attracting the N-pole magnet on the end face of the driven structure 242, so that the driven structure 242 rotates.

[0162] State 2: One N-pole magnet on the periphery of the driving structure 241 rotates to the closest position to the driven structure 242.

[0163] State 3: One S-pole magnet on the periphery of the driving structure 241 gradually approaches the end face of the driven structure 242 in the direction of rotation, attracting the N-pole magnet on the end face of the driven structure 242. One N-pole magnet on the periphery of the driving structure 241 gradually moves away from the end face of the driven structure 242 in the direction of rotation, attracting the S-pole magnet on the end face of the driven structure 242, so that the driven structure 242 rotates.

[0164] State 4: One S-pole magnet on the periphery of the driving structure 241 rotates to the closest position to the driven structure 242.

[0165] During operation, states 1 to 4 are alternately performed in sequence, so that the driven structure 242 continuously rotates.

[0166] It should be noted that the terms "one embodiment", "an embodiment", "exemplary embodiment", "some embodiments", etc. as used in the specification are used to describe a particular embodiment, but not to limit or exclude other embodiments. Also, such terminology does not represent a disclaimer of a broader embodiment or method.

[0167] In general, the terminology used should be understood in context. For example, the term "one or more", as used herein, can be used in the singular sense or in the plural sense depending on the context in which the term is used. Similarly, the terms such as "a" or "said" can be interpreted to convey a singular usage or a plural usage, depending on the context in which the terms are used.

[0168] It should be readily understood that "on," "above," and "on top of" in the present application are to be interpreted in the broadest context possible so that "on" means not only "directly on" but also includes the meaning of "on" with intervening features or layers therebetween, and "above" or "on top of" includes not only the meaning of "above" or "on top of" but also the meaning of "above" or "on top of" without intervening features or layers therebetween (i.e., directly on).

[0169] In addition, spatially relative terms, such as "under", "below", "lower", "above", "upper", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms can be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device can be otherwise oriented (rotated 90° or at other orientations) and the spatially relative descriptors used herein can be interpreted accordingly.

[0170] It should be noted that the brief description of terms in the present application is only for the convenience of understanding the embodiments described next, and is not intended to limit the embodiments of the present application. Unless otherwise specified, these terms should be understood in accordance with their ordinary and general meanings.

[0171] In addition, the terms "comprising" and "having" and any variations thereof, are intended to cover but not limited to inclusive, for example, a product or device containing a series of components does not have to be limited to those components clearly listed, but can include other components not clearly listed or inherent to these products or devices.

[0172] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0173] The terms "first", "second", are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0174] In the description of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0175] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part 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.

Claims

1. A range hood characterized by, The utility model relates to a kind of air supply device, including: Box (100), the box (100) is provided with installation cavity; Fan assembly (200), the fan assembly (200) is located in the installation cavity, the fan assembly (200) includes: Spiral case (210), the spiral case (210) is connected with the box (100); Impeller (220), the impeller (220) is rotatably connected with the spiral case (210): Magnetic coupling (240), the magnetic coupling (240) includes: Driving structure (241); Driven structure (242), the driven structure (242) has interval with the driving structure (241), and the driven structure (242) is connected with the impeller (220); Motor (250), the motor (250) includes: Motor body (251); Driving shaft (252), the driving shaft (252) is connected with the motor body (251), and the driving shaft (252) is connected with the driving structure (241); The motor (250) drives the driving structure (241) to rotate, and the driving structure (241) drives the driven structure (242) to rotate by magnetic force, and the driven structure (242) drives the impeller (220) to rotate.

2. The hood according to claim 1, characterized in that, The motor body (251) is connected with the box (100), and the motor body (251) has interval with the spiral case (210).

3. The hood according to claim 1, characterized in that, The spiral case (210) is provided with inner cavity, and the impeller (220) is located in the inner cavity; The spiral case (210) is provided with first air inlet structure (211) and second air inlet structure (212), and first air inlet structure (211) and second air inlet structure (212) are communicated with the inner cavity, and the first air inlet structure (211) and the second air inlet structure (212) are oppositely arranged along the axial direction of the impeller (220); Along the radial direction of the impeller (220), the motor body (251) is located at the side of the spiral case (210) away from the impeller (220).

4. The hood according to claim 1, characterized in that, The axial direction of the driving structure (241) is perpendicular to the axial direction of the driven structure (242).

5. The hood according to any one of claims 1 to 4, characterized in that The driving structure (241) includes: First body (2411), the first body (2411) is connected with the driving shaft (252); A plurality of first magnetic members (2412), a plurality of the first magnetic members (2412) are arranged on the circumferential side of the first body (2411); A plurality of second magnetic members (2413), a plurality of the second magnetic members (2413) are arranged on the circumferential side of the first body (2411), and a plurality of the second magnetic members (2413) and a plurality of the first magnetic members (2412) are alternately arranged along the circumferential direction of the first body (2411); The magnetic property of the first magnetic member (2412) and the second magnetic member (2413) is opposite.

6. The hood according to claim 5, characterized in that, The driven structure (242) includes: Second body (2421), the second body (2421) is connected with the impeller (220); A plurality of third magnetic pieces (2422) are arranged at the end of the second body (2421) facing the driving structure (241); A plurality of fourth magnetic pieces (2423) are arranged at the end of the second body (2421) facing the driving structure (241), and the third magnetic pieces (2422) and the fourth magnetic pieces (2423) are arranged alternately along the circumference of the second body (2421); The third magnetic pieces (2422) and the fourth magnetic pieces (2423) are opposite in magnetism.

7. The hood according to claim 6, characterized in that The driving structure (241) is located on the side of the third magnetic pieces (2422) and the fourth magnetic pieces (2423) away from the second body (2421); The first magnetic pieces (2412) have a spacing with the third magnetic pieces (2422) and a spacing with the fourth magnetic pieces (2423); The second magnetic pieces (2413) have a spacing with the third magnetic pieces (2422) and a spacing with the fourth magnetic pieces (2423).

8. The hood according to claim 6, characterized in that, The extension direction of the first magnetic pieces (2412) is parallel to the extension direction of the second magnetic pieces (2413), and the extension direction of the second magnetic pieces (2413) is parallel to the axial direction of the first body (2411).

9. The hood according to claim 6, characterized in that, The extension direction of the third magnetic pieces (2422) is consistent with the radial direction of the second body (2421); The extension direction of the fourth magnetic pieces (2423) is consistent with the radial direction of the second body (2421).

10. The hood according to claim 6, characterized in that, The end surface of the first body (2411) away from the motor (250) coincides with the axis of the second body (2421).

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