Impeller for centrifugal fan, centrifugal fan and range hood

Abstract

The utility model relates to an impeller for a centrifugal fan, the centrifugal fan and a range hood. A rear disc; the blades are circumferentially distributed between the front disc and the rear disc at intervals, and the two ends of each blade are connected with the front disc and the rear disc respectively; the first circuit board is fixedly connected with the front disc, and the first circuit board is provided with a first electric connection part which can be correspondingly and electrically connected with the first end of each blade; the second circuit board is fixedly connected with the rear disc, the second circuit board is provided with second electric connecting parts capable of being correspondingly and electrically connected with the second ends of the blades, the second electric connecting parts correspond to the first electric connecting parts one to one, and the second electric connecting parts are electrically connected with the corresponding first electric connecting parts; and the second electric connection part and the corresponding first electric connection part can generate a magnetic field after being electrified. A magnetic field repelling electrified oil smoke can be generated in the impeller so as to prevent oil dirt from making contact with the blades, the oil-proof purpose is achieved, and the oil dirt cleaning effect of the impeller is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil fume purification technical field especially, relate to a kind of impeller for centrifugal fan, centrifugal fan and range hood. BACKGROUND

[0002] Range hood has become one of indispensable kitchen household appliances in modern family. Range hood is worked by using fluid dynamics principle, and oil fume is sucked by centrifugal fan installed in range hood. Centrifugal fan includes volute, impeller installed in volute and motor driving impeller to rotate. When impeller rotates, negative pressure suction is generated in the center of fan, and oil fume below range hood is sucked into fan, and is collected and guided by volute after being accelerated by fan and discharged outdoor.

[0003] Since oil fume needs to be discharged after being treated by centrifugal fan, it will cause oil stain to adhere to the inner wall of impeller and volute of fan, and long-term accumulation forms oil stain dirt, especially, if impeller is not cleaned regularly, excessive accumulation of oil stain dirt in impeller will block the air inlet channel between blades of impeller, which will reduce the performance of range hood.

[0004] In order to remove oil from centrifugal fan, Chinese utility model with patent number ZL202420043403.3 (authorized publication number CN222459604U) discloses an oil fume machine air guide ring heating oil removal device, heating ring is arranged on smoke exhaust volute, heating ring can heat the inhaled oil gas, and the flowability of heated oil gas is increased, so that it is convenient to more smoothly discharge oil fume machine, and the oil stain adhered to impeller can be softened by heated oil gas. Although the above-mentioned device can solve the problem of cleaning oil stain on impeller to some extent, only part of oil stain can be liquefied by heating, and some stubborn oil stain still cannot be removed with particles. Therefore, further improvement is needed for existing technology. UTILITY MODEL CONTENTS

[0005] The first technical problem to be solved by the utility model is to provide an impeller for centrifugal fan by repelling oil stain to improve oil stain cleaning effect.

[0006] The second technical problem to be solved by the utility model is to provide a centrifugal fan applying the above-mentioned impeller.

[0007] The third technical problem to be solved by the utility model is to provide a range hood applying the above-mentioned centrifugal fan.

[0008] The technical scheme adopted by the utility model to solve the above-mentioned first technical problem is as follows: the impeller for centrifugal fan includes:

[0009] Front disc;

[0010] a rear disc, which is arranged in opposite to the front disc;

[0011] a plurality of blades, which are circumferentially spaced between the front disc and the rear disc, and each of the blades has two ends connected to the front disc and the rear disc respectively;

[0012] characterized in further comprising:

[0013] a first circuit board, which is fixedly connected to the front disc, and the first circuit board has a first electric connection part corresponding to the first end of each blade for electric connection; and

[0014] a second circuit board, which is fixedly connected to the rear disc, and the second circuit board has a second electric connection part corresponding to the second end of each blade for electric connection, the second electric connection part and the first electric connection part correspond to each other, the second electric connection part is electrically connected to the corresponding first electric connection part, and the second electric connection part and the corresponding first electric connection part can generate a magnetic field after being energized.

[0015] In order to facilitate the energization of the second electric connection part and the corresponding first electric connection part, the impeller further comprises a mounting disc fixedly connected to the blades, the mounting disc is located in the center of the region surrounded by all the blades, and the mounting disc is provided with a power supply mechanism electrically connected to the second electric connection part or the first electric connection part.

[0016] The structure of the above-mentioned power supply mechanism has many kinds, preferably, the power supply mechanism comprises a first mounting frame provided on the mounting disc and a conductive assembly constrained in the first mounting frame, the first mounting frame can rotate relative to the conductive assembly, the inner wall of the first mounting frame is circumferentially spaced with a first conductive part, the conductive assembly comprises a second conductive part, one end of the second conductive part is electrically connected to a power supply, and the other end of the second conductive part can intermittently contact the first conductive part during the rotation of the first mounting frame relative to the conductive assembly.

[0017] In order to realize the installation of the second conductive part, the conductive assembly further comprises a second mounting frame for installing the second conductive part, the second mounting frame is provided with a mounting part which is open towards the inner wall of the first mounting frame, the second conductive part is at least partially exposed to the mounting part, and the mounting part is provided with an elastic member acting on the second conductive part, the elastic member can make the second conductive part always have a tendency to contact the inner wall of the first mounting frame.

[0018] Further, the part of the inner wall of the first mounting frame located below the first conductive part has a stepped portion, and the bottom of the second conductive part is arranged on the horizontal plane of the stepped portion.

[0019] In order to simultaneously turn on the two groups of blades arranged oppositely, the first conductive parts are multiple and arranged in pairs, the mounting parts on the second mounting frame are two and arranged oppositely, the second conductive parts are arranged in pairs in each mounting part, and the two second conductive parts can simultaneously contact the two first conductive parts arranged oppositely during the rotation of the first mounting frame relative to the conductive assembly.

[0020] In order to prevent the wire speed from winding around the impeller, the outer periphery of the first mounting frame is provided with a plurality of wire routing tubes arranged radially with the first mounting frame as the center, at least two wire harnesses are arranged in each wire routing tube, the wire routing tubes correspond to the first conductive parts one by one, one end of all the wire harnesses in each wire routing tube is electrically connected with the corresponding first conductive part, and the other end of each wire harness in each wire routing tube is electrically connected with a first electric connection part or a second electric connection part.

[0021] Further, the impeller further comprises at least two spokes arranged radially with the center of the mounting disc as the center, one end of each spoke is connected with the mounting disc, the other end of each spoke is connected with the blade, and each wire routing tube is arranged on the surface of the mounting disc and the spoke.

[0022] The utility model solves the technical scheme that the above -mentioned second technical problem adopts: a centrifugal fan, including volute, the impeller of setting in volute and the motor of driving impeller rotation, its characterized in that: the impeller adopts the impeller as above.

[0023] The utility model solves the technical scheme that the above -mentioned third technical problem adopts: a range hood, including the casing with the air inlet on the front side, being equipped with centrifugal fan in the casing, its characterized in that: the centrifugal fan adopts the centrifugal fan as above.

[0024] In order to solve the problem that oil dirt accumulates on the impeller, the casing is provided with a negative ion generator arranged around the outer periphery of the centrifugal fan, and the negative ion generator has a release tip capable of releasing electrons.

[0025] Further, the front side of the casing is provided with an oil screen arranged at the air inlet, and the negative ion generator is arranged behind the oil screen.

[0026] Compared with the prior art, the utility model has the advantages that: the first electric connection part on the first circuit board is electrically connected with the second electric connection part on the corresponding second circuit board, so that a magnetic field is generated on the impeller after the first electric connection part and the second electric connection part are electrified, the magnetic field can repel the charged oil fume, hinder the oil dirt from contacting the blade, achieve the purpose of preventing oil, and improve the oil dirt cleaning effect of the impeller. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structure schematic view of the range hood in the utility model embodiment.

[0028] Figure 2 for Figure 1 A sectional view (part of the shell omitted);

[0029] Figure 3 This is an exploded view of the impeller and motor in an embodiment of this utility model;

[0030] Figure 4 This is a cross-sectional view of the impeller in an embodiment of the present invention. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0032] like Figures 1 to 4 As shown, this embodiment relates to an impeller for a centrifugal fan, a centrifugal fan using the aforementioned impeller, and a range hood using the aforementioned centrifugal fan.

[0033] like Figure 1 As shown, the range hood in this embodiment includes a housing 1c with an air inlet 100 on the front side. A centrifugal fan is installed inside the housing 1c, and a negative ion generator 7 is arranged around the periphery of the centrifugal fan inside the housing 1c. An oil filter 8 is arranged at the air inlet 100 on the front side of the housing 1c, and the negative ion generator 7 is located behind the oil filter 8. The negative ion generator 7 has a release tip 71 capable of releasing electrons. The structure of the negative ion generator 7 in this embodiment adopts existing technology and will not be described in detail here.

[0034] like Figure 2 As shown, the centrifugal fan in this embodiment includes a volute 1a, an impeller disposed within the volute 1a, and a motor 1b that drives the impeller to rotate. Figure 3 and Figure 4 As shown, the impeller in this embodiment includes a front disc 10, a rear disc 11, multiple blades 12, a first circuit board 2, and a second circuit board 3. The rear disc 11 is spaced apart from the front disc 10. The multiple blades 12 are circumferentially spaced between the front disc 10 and the rear disc 11, and the two ends of each blade 12 are connected to the front disc 10 and the rear disc 11, respectively. The first circuit board 2 is fixedly connected to the front disc 10, and the first circuit board 2 has a first electrical connection part 21 that can be electrically connected to the first end of each blade 12. The second circuit board 3 is fixedly connected to the rear disc 11, and the second circuit board 3 has a second electrical connection part 31 that can be electrically connected to the second end of each blade 12. The second electrical connection part 31 and the first electrical connection part 21 correspond one-to-one. The second electrical connection part 31 is electrically connected to its corresponding first electrical connection part 21, and the second electrical connection part 31 and its corresponding first electrical connection part 21 can generate a magnetic field after being energized.

[0035] In order to make the whole impeller more beautiful, the first circuit board 2 is shaped the same as the front disc 10, and the second circuit board 3 is shaped the same as the rear disc 11, as shown in Figure 3 the front disc 10 and the rear disc 11 are both annular, the first circuit board 2 and the second circuit board 3 are also both annular, the first electric connection part 21 and the second electric connection part 31 are both convex points, and the wire used for electrically connecting the second electric connection part 31 and the corresponding first electric connection part 21 can be embedded in the blade.

[0036] The impeller further comprises a mounting disc 4 fixedly connected with the blades 12, and at least two spokes 41 arranged radially in the center of the mounting disc 4, one end of each spoke 41 is connected with the mounting disc 4, and the other end of each spoke 41 is connected with the blade 12, the mounting disc 4 is located in the center of the region surrounded by all the blades 12, a first through hole for the motor 1b to pass through is formed in the center of the mounting disc 4, and the structure of the motor 1b mounted on the mounting disc 4 is prior art, which will not be described here.

[0037] The mounting disc 4 is provided with a power supply mechanism 5 electrically connected with the second electric connection part 31 or the first electric connection part 21. As shown in Figure 3 the power supply mechanism 5 in the embodiment comprises a first mounting frame 51 arranged on the mounting disc 4 and a conductive assembly 52 constrained in the first mounting frame 51, the first mounting frame 51 can rotate relative to the conductive assembly 52, a first conductive part 511 is circumferentially and spacedly arranged on the inner wall of the first mounting frame 51, the conductive assembly 52 comprises a second conductive part 521, one end of the second conductive part 521 is electrically connected with the power supply, and the other end of the second conductive part 521 can intermittently contact with the first conductive part 511 during the rotation of the first mounting frame 51 relative to the conductive assembly 52.

[0038] As shown in Figure 4 the conductive assembly 52 further comprises a second mounting frame 522 for mounting the second conductive part 521, the second mounting frame 522 is provided with a mounting part open to the inner wall of the first mounting frame 51, the second conductive part 521 is at least partially exposed to the mounting part, and the mounting part is provided with an elastic member 523 acting on the second conductive part 521, the elastic member 523 can make the second conductive part 521 always have a tendency to contact with the inner wall of the first mounting frame 51. The elastic member 523 in the embodiment is a spring, and in order to realize the constraint of the conductive assembly 52 in the first mounting frame 51, the inner circumferential wall of the first mounting frame 51 has a stepped part 512 below the first conductive part 511, and the bottom of the second conductive part 521 is arranged on the horizontal plane of the stepped part 512.

[0039] The first mounting frame 51 in the embodiment is annular, the first conductive part 511 is a conductive sheet (for example, a copper sheet), the first mounting frame 51 is fixed on the mounting disc 4, and the second mounting frame 522 is provided with a second through hole 5220 in the center for the motor 1b to pass through, so that the installation of the motor 1b is not affected.

[0040] In the embodiment, the first conductive part 511 is a plurality of parts and is provided in pairs; the mounting part on the second mounting frame 522 is two parts and is provided oppositely; the second conductive part 521 is provided in the mounting part in pairs; and during the rotation of the first mounting frame 51 relative to the conductive assembly 52, the two second conductive parts 521 can simultaneously contact the two first conductive parts 511 provided oppositely.

[0041] In addition, in order to avoid the winding of the wire harness and the impeller, the outer periphery of the first mounting frame 51 is provided with a plurality of wire routing tubes 6 which are arranged radially with the first mounting frame 51 as the center, at least two wire harnesses are arranged in each wire routing tube 6, the wire routing tube 6 corresponds to the first conductive part 511, and one end of all the wire harnesses in each wire routing tube 6 is electrically connected to the corresponding first conductive part 511, and the other end of each wire harness in each wire routing tube 6 is electrically connected to the first electric connection part 21 or the second electric connection part 31.

[0042] As shown in Figure 3 In the embodiment, the number of the wire routing tube 6 and the number of the spoke 41 are the same, which are both six, each wire routing tube 6 is arranged on the surface of the mounting disc 4 and one spoke 41, and the number of the wire harness arranged in each wire routing tube 6 is the same, so that all the blades are divided into six groups uniformly, and the blades are arranged in pairs.

[0043] In the embodiment, the nitrogen and oxygen molecules in the air are ionized by the negative ion generator 7 to release a large number of electrons, the released electrons interact with the liquid oil droplets and solid particles in the oil fume, so that the liquid oil droplets and solid particles in the oil fume are charged, under the negative pressure generated by the rotation of the impeller, a large amount of charged oil fume is sucked into the volute 1a, in the magnetic field of the impeller, the oil fume is far away from the impeller and the blades, so that the purpose of oil separation and oil prevention of the impeller is achieved.

[0044] In the embodiment, the working process of generating the magnetic field is as follows:

[0045] When the mounting disc 4 and the blade 12 are driven to rotate by the motor 1c, the first mounting frame 51 can rotate with the mounting disc 4 due to the first mounting frame 51 being fixedly installed on the mounting disc 4; and the first mounting frame 51 can rotate relative to the second conductive part 521 due to the second conductive part 521 being constrained in the first mounting frame 51 by the elastic member 523; therefore, when the first mounting frame 51 rotates with the mounting disc 4, the first conductive part 511 arranged on the inner wall of the first mounting frame 51 can intermittently contact the second conductive part 521, and the first conductive part 511 can continuously contact the second conductive part 521 due to the relatively fast rotation of the mounting disc 4 and the blade 12, so that the power supply can supply power to the second electric connection part 31 of each blade and the corresponding first electric connection part 21 to generate a magnetic field, thereby continuously repelling the charged oil fume and hindering the oil dirt from contacting the blade, so as to achieve the oil-proof purpose.

[0046] In the description and claims of the present application, terms are used to generally refer to the structure of the application as well as the action devices and steps. When terms are used in the description and claims of the present application, such terms are to be interpreted to encompass the structural equivalents of the specified terms. The terms "front", "back", "up", "down", "left", "right", "side", "top", "bottom", and the like as used in this description and the claims are used for convenience, and are not intended to connote or otherwise imply directions or orientations of the application or its components.

Claims

1. A impeller for centrifugal fan, comprising: a front disc (10); a rear disc (11) oppositely spaced from the front disc (10); a plurality of blades (12) circumferentially spaced between the front disc (10) and the rear disc (11), two ends of each blade (12) being connected with the front disc (10) and the rear disc (11) respectively; characterized in that further comprising: a first circuit board (2) fixedly connected with the front disc (10), and the first circuit board (2) has a first electrical connection part (21) capable of corresponding electrical connection with a first end of each blade (12); and a second circuit board (3) fixedly connected with the rear disc (11), and the second circuit board (3) has a second electrical connection part (31) capable of corresponding electrical connection with a second end of each blade (12), the second electrical connection part (31) and the first electrical connection part (21) correspond one by one, the second electrical connection part (31) is electrically connected with the corresponding first electrical connection part (21), and the second electrical connection part (31) and the corresponding first electrical connection part (21) can generate a magnetic field after being powered.

2. The impeller of claim 1, wherein: The impeller further comprises a mounting disc (4) fixedly connected with the blades (12), the mounting disc (4) is located in the center of the region surrounded by all the blades (12), and the mounting disc (4) is provided with a power supply mechanism (5) electrically connected with the second electrical connection part (31) or the first electrical connection part (21).

3. The impeller of claim 2, wherein: The power supply mechanism (5) comprises a first mounting frame (51) provided on the mounting disc (4) and a conductive assembly (52) constrained in the first mounting frame (51), the first mounting frame (51) can rotate relative to the conductive assembly (52), a first conductive part (511) is circumferentially spaced on the inner wall of the first mounting frame (51), the conductive assembly (52) comprises a second conductive part (521), one end of the second conductive part (521) is electrically connected with a power supply, and the other end of the second conductive part (521) can intermittently contact the first conductive part (511) during the rotation of the first mounting frame (51) relative to the conductive assembly (52).

4. The impeller of claim 3, wherein: The conductive assembly (52) further comprises a second mounting frame (522) for mounting the second conductive part (521), the second mounting frame (522) is provided with an installation part open to the inner wall of the first mounting frame (51), the second conductive part (521) is at least partially exposed to the installation part, and an elastic member (523) acting on the second conductive part (521) is arranged in the installation part, the elastic member (523) can always make the second conductive part (521) have a tendency to contact the inner wall of the first mounting frame (51).

5. The impeller of claim 4, wherein: The inner circumferential wall of the first mounting frame (51) has a stepped portion (512) below the first conductive part (511), and the bottom of the second conductive part (521) is arranged on the horizontal plane of the stepped portion (512).

6. The impeller of claim 4, wherein: The first conductive parts (511) are multiple and arranged in pairs; the mounting parts on the second mounting frame (522) are two and arranged oppositely; the second conductive parts (521) are arranged in pairs in each mounting part; during the rotation of the first mounting frame (51) relative to the conductive assembly (52), the two second conductive parts (521) can simultaneously contact the two oppositely arranged first conductive parts (511).

7. The impeller of claim 3, wherein: The outer periphery of the first mounting frame (51) is provided with a plurality of wire routing tubes (6) arranged radially with the first mounting frame (51) as the center; at least two wire harnesses are arranged in each wire routing tube (6); the wire routing tube (6) corresponds to the first conductive part (511); one end of all wire harnesses in each wire routing tube (6) is electrically connected to the corresponding first conductive part (511); the other end of each wire harness in each wire routing tube (6) is electrically connected to a first electrical connection part (21) or a second electrical connection part (31).

8. The impeller of claim 7, wherein: The impeller further comprises at least two spokes (41) arranged radially with the center of the mounting disc (4) as the center; one end of each spoke (41) is connected to the mounting disc (4); the other end of each spoke (41) is connected to the blade (12); each wire routing tube (6) is arranged on the surface of the mounting disc (4) and the spoke (41).

9. A centrifugal fan comprising a volute (la), an impeller disposed in the volute (la), and a motor (lb) for driving the impeller to rotate, characterized by: The impeller adopts the impeller according to any one of claims 1-8.

10. A range hood comprising a casing (1c) having an air inlet (100) on a front side, a centrifugal fan being arranged in the casing (1c), characterized in that: The centrifugal fan adopts the centrifugal fan according to claim 9.

11. The hood according to claim 10, characterized in that: The machine shell (1c) is provided with a negative ion generator (7) arranged around the outer periphery of the centrifugal fan; the negative ion generator (7) has a release tip (71) capable of releasing electrons.

12. The hood according to claim 11, characterized in that: The front side of the machine shell (1c) is provided with an oil screen (8) arranged at the air inlet (100); the negative ion generator (7) is arranged behind the oil screen (8).

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