Centrifugal fan with adjustable air inlet rate

Abstract

The utility model provides a centrifugal fan with adjustable air inlet rate, which comprises a volute, a motor and a wind wheel, the motor is fixed to one side of the volute in the axial direction, a rotating shaft of the motor movably penetrates through the side wall of the volute and then extends into the volute, and the wind wheel is arranged in the volute and coaxially fixed to the rotating shaft of the motor. An air inlet is formed in the other side of the axial direction of the volute; a wind shield is fixed to an air inlet of the volute, and a plurality of first air inlet holes which are evenly distributed in the circumferential direction are formed in the wind shield. An adjusting plate is coaxially arranged on the outer side of the air baffle, second air inlet holes in one-to-one correspondence with the multiple air inlet holes are formed in the adjusting plate, the adjusting plate is rotationally connected with the air baffle, and a locking structure is further arranged between the adjusting plate and the air baffle; the centrifugal fan has the function of adjusting the air inlet amount and the air outlet amount, and therefore the centrifugal fan can be applied to the scene where the air amount needs to be adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifugal fan technical field, specifically, relate to a kind of adjustable centrifugal fan of air intake. BACKGROUND

[0002] Centrifugal fan is the fan type commonly used in market at present, centrifugal fan on market at present mainly includes volute, motor and wind wheel;Motor is fixed in the axial direction of volute one side, the rotating shaft of motor is active and penetrates the side wall of volute and then extends into volute, wind wheel is arranged in the inside of volute and is coaxially fixed with the rotating shaft of motor;When motor drives wind wheel to rotate, air in external environment can enter from air inlet located in the other side of volute, then is discharged from the air outlet of volute;However, in the structure of existing centrifugal fan, the air intake of centrifugal fan is not adjustable, that is, when existing centrifugal fan needs to be applied to the scene of air volume adjustable, there is the case that existing centrifugal fan cannot meet the use demand. SUMMARY

[0003] The utility model solves the technical problem to provide a kind of adjustable centrifugal fan of air intake, it has the function of air intake and air volume regulation, so as to make centrifugal fan be applied to the scene of air volume adjustable.

[0004] The utility model provides a kind of adjustable centrifugal fan of air intake, including volute, motor and wind wheel;Motor is fixed in the axial direction of volute one side, the rotating shaft of motor is active and penetrates the side wall of volute and then extends into volute, wind wheel is arranged in the inside of volute and is coaxially fixed with the rotating shaft of motor;The other side of volute axial direction forms air inlet;Air inlet of volute is fixed with baffle, a plurality of first air inlet holes that are circumferentially uniformly distributed are arranged on baffle;Baffle outside is coaxially provided with adjusting plate, second air inlet hole that is one-to-one corresponding with a plurality of air inlet holes is arranged on adjusting plate, adjusting plate is rotationally connected with baffle, locking structure is also arranged between adjusting plate and baffle;When adjusting plate is rotated relative to baffle, each second air inlet hole is used to be dislocated with the first air inlet hole on corresponding position to change the air intake of centrifugal fan.

[0005] The utility model passes through using above-mentioned structure, when adjusting plate is rotated relative to baffle, the air intake of centrifugal fan can be regulated, so as to regulate the air volume of centrifugal fan, and then centrifugal fan can be applied to the scene of air volume adjustable.

[0006] In one possible implementation, the locking structure includes a hand-tightening bolt; the threaded portion of the hand-tightening bolt coaxially passes through the adjusting plate and is coaxially threadedly connected to the wind deflector, and the adjusting plate is rotatably connected to the wind deflector through the threaded portion of the hand-tightening bolt; when the hand-tightening bolt is tightened, it locks the adjusting plate and the wind deflector to restrict the rotation of the adjusting plate relative to the wind deflector; with this structure, under the action of the hand-tightening bolt, the adjusting plate is reliably rotatably connected to the wind deflector because it is rotatably connected to the wind deflector through the threaded portion of the hand-tightening bolt; when the hand-tightening bolt is tightened, it presses the adjusting plate against the wind deflector, thus restricting the rotation of the adjusting plate relative to the wind deflector and locking the adjusting plate and the wind deflector; when the hand-tightening bolt is loosened, the adjusting plate can rotate relative to the wind deflector.

[0007] In one possible implementation, the outer edge of the adjusting plate is provided with an outwardly bent lug; by providing the lug, when the adjusting plate needs to rotate relative to the wind deflector, fingers can be pinched on the lug, thereby facilitating the rotation of the adjusting plate relative to the wind deflector.

[0008] In one possible implementation, the diameter of each second air inlet is the same as the diameter of the corresponding first air inlet; by adopting this structure, when each second air inlet is aligned with the first air inlet at the corresponding position, the centrifugal fan can be at its maximum air intake.

[0009] In one possible implementation, when the centrifugal fan is at its maximum air intake, the axis of each second air inlet is aligned with the axis of the corresponding first air inlet. By adopting this structure, since the diameter of each second air inlet is the same as the diameter of the corresponding first air inlet, the centrifugal fan can be ensured to be at its maximum air intake when the axis of each second air inlet is aligned with the axis of the corresponding first air inlet.

[0010] In one possible implementation, the wind deflector is fixed to the volute by a number of screws spaced circumferentially apart; this structure ensures that the wind deflector is reliably fixed to the volute. Attached Figure Description

[0011] Figure 1 is a three-dimensional structural diagram of this utility model;

[0012] Figure 2 is a partially exploded three-dimensional structural diagram of the present invention;

[0013] Figure 3 is a three-dimensional structural diagram of the adjusting plate after it rotates relative to the wind deflector. Detailed Implementation

[0014] First, those skilled in the art should understand that the embodiments are only used to explain the technical principles of the application examples, and are not intended to limit the protection scope of the application examples. Those skilled in the art can make adjustments as needed to adapt to specific application occasions.

[0015] In the description of the application examples, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the application examples can be understood according to the specific circumstances.

[0016] In the application examples, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0017] The application will be further described in detail below in conjunction with the drawings and specific embodiments.

[0018] Referring to FIGS. 1-3, the application example discloses a centrifugal fan with adjustable air inlet, comprising a volute 1, a motor 2 and a fan wheel 3; the motor 2 is fixed on one side of the volute 1 in the axial direction, the rotating shaft of the motor 2 is movably penetrated through the side wall of the volute 1 and then extends into the volute 1, and the fan wheel 3 is arranged inside the volute 1 and coaxially fixed with the rotating shaft of the motor 2; the other side of the volute 1 in the axial direction forms an air inlet; a baffle plate 4 is fixed at the air inlet of the volute 1, and a plurality of first air inlet holes 41 are arranged on the baffle plate 4 in a circumferential uniform distribution; an adjusting plate 5 is coaxially arranged on the outer side of the baffle plate 4, a plurality of second air inlet holes 51 are arranged on the adjusting plate 5 in one-to-one correspondence with the plurality of air inlet holes 51, the adjusting plate 5 is rotationally connected with the baffle plate 4, and a locking structure is further arranged between the adjusting plate 5 and the baffle plate 4; when the adjusting plate 5 rotates relative to the baffle plate 4, each second air inlet hole 51 is used to dislocate the first air inlet hole 41 at the corresponding position to change the air inlet of the centrifugal fan.

[0019] The locking structure comprises a hand screw bolt 6; the screw rod of the hand screw bolt 6 is coaxially movably penetrated through the adjusting plate 5 and is coaxially screwed with the wind deflector 4, the adjusting plate 5 is rotatably connected with the wind deflector 4 through the screw rod of the hand screw bolt 6; when the hand screw bolt 6 is screwed, the hand screw bolt 6 is used to lock the adjusting plate 5 and the wind deflector 4 to limit the rotation of the adjusting plate 5 relative to the wind deflector 4; after the structure is adopted, the adjusting plate is rotatably connected with the wind deflector under the action of the hand screw bolt, so that the adjusting plate can be reliably rotatably connected with the wind deflector; when the hand screw bolt is screwed, the hand screw bolt can press the adjusting plate on the wind deflector, at this time, the rotation of the adjusting plate relative to the wind deflector is limited, so that the locking of the adjusting plate and the wind deflector is realized; when the hand screw bolt is unscrewed, the adjusting plate can rotate relative to the wind deflector.

[0020] The outer edge of the adjusting plate 5 is provided with an outwardly bent lug 52; through the setting of the lug, when the adjusting plate needs to rotate relative to the wind deflector, the fingers can be pinched on the lug, so that the rotation of the adjusting plate relative to the wind deflector is facilitated.

[0021] The aperture of each second air inlet hole 51 is the same as that of the corresponding first air inlet hole 41; after the structure is adopted, when each second air inlet hole is aligned with the first air inlet hole at the corresponding position, the centrifugal fan can be in the maximum air intake.

[0022] When the centrifugal fan is in the maximum air intake, the axis of each second air inlet hole 51 is aligned with the axis of the first air inlet hole 41 at the corresponding position; after the structure is adopted, since the aperture of each second air inlet hole is the same as that of the corresponding first air inlet hole, when the axis of each second air inlet hole is aligned with the axis of the first air inlet hole at the corresponding position, the centrifugal fan can be ensured to be in the maximum air intake.

[0023] The wind deflector 4 is fixed with the volute 1 through a plurality of circumferentially spaced screws 7; after the structure is adopted, the wind deflector can be reliably fixed with the volute.

[0024] When the centrifugal fan needs to be adjusted, the hand screw bolt is first loosened, then the adjusting plate is manually rotated, when the adjusting plate rotates relative to the wind deflector, when the overlapping area of each second air inlet hole and the first air inlet hole at the corresponding position gradually increases, the air intake of the centrifugal fan can be increased, when the overlapping area of each second air inlet hole and the first air inlet hole at the corresponding position gradually decreases, the air intake of the centrifugal fan can be reduced, so that the adjustment of the air intake of the centrifugal fan is realized, after the adjusting plate rotates relative to the wind deflector, the hand screw bolt is tightened again to lock the adjusting plate and the wind deflector.

[0025] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements within the technical scope disclosed by the present application can be easily conceived by the person skilled in the art, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A centrifugal fan with adjustable air intake, comprising a volute (1), a motor (2), and a fan wheel (3); the motor (2) is fixed on one side of the volute (1) in the axial direction, the shaft of the motor (2) extends through the side wall of the volute (1) and into the volute (1), the fan wheel (3) is disposed inside the volute (1) and coaxially fixed with the shaft of the motor (2); an air inlet is formed on the other side of the volute (1) in the axial direction; characterized in that: The air baffle (4) is fixed at the air inlet of the volute (1), and a plurality of first air inlets (41) are uniformly distributed on the air baffle (4); the outer side of the air baffle (4) is coaxially provided with an adjusting plate (5), and a plurality of second air inlets (51) are arranged on the adjusting plate (5) one by one corresponding to the air inlets (51); the adjusting plate (5) is rotatably connected with the air baffle (4), and a locking structure is further arranged between the adjusting plate (5) and the air baffle (4); when the adjusting plate (5) rotates relative to the air baffle (4), each second air inlet (51) is used for being dislocated with the first air inlet (41) at the corresponding position to change the air inlet amount of the centrifugal fan.

2. The air intake adjustable centrifugal fan according to claim 1, characterized in that: The locking structure includes a hand screw bolt (6); the screw rod of the hand screw bolt (6) is coaxially movably penetrated through the adjusting plate (5) and coaxially threadedly connected with the air baffle (4), and the adjusting plate (5) is rotatably connected with the air baffle (4) through the screw rod of the hand screw bolt (6); when the hand screw bolt (6) is tightened, the hand screw bolt (6) is used for locking the adjusting plate (5) and the air baffle (4) to limit the rotation of the adjusting plate (5) relative to the air baffle (4).

3. The air intake adjustable centrifugal fan according to claim 1, wherein: The outer edge of the adjusting plate (5) is provided with an outwardly bent lug (52).

4. The centrifugal fan with adjustable air intake according to any one of claims 1-3, characterized in that: The hole diameter of each second air inlet (51) is the same as that of the corresponding first air inlet (41).

5. The air volume adjustable centrifugal fan according to claim 4, characterized in that: When the centrifugal fan is in the maximum air inlet amount, the axis of each second air inlet (51) is aligned with the axis of the first air inlet (41) at the corresponding position.

6. The adjustable flow rate centrifugal fan according to claim 1 or 2 or 3 or 5, wherein: The air baffle (4) is fixed with the volute (1) through a plurality of circumferentially spaced screws (7).

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