Centrifugal fan

Abstract

The utility model discloses a centrifugal fan, which relates to the field of fans, aims to overcome the defect that an impeller is inconvenient to clean through an air inlet, and adopts the technical scheme that the centrifugal fan comprises a motor, the impeller and a casing, a flushing opening is formed in the casing, a turning plate for closing the flushing opening is rotatably connected onto the casing, a fixing hoop is arranged on the turning plate, and the impeller is arranged in the casing. The washing opening is formed in the machine shell, so that people can wash the impeller through the washing opening, compared with the mode that the impeller is washed only through the air inlet, dust on the impeller can be better cleaned away, the turning plate capable of sealing the washing opening is arranged, and therefore the impeller can be washed more conveniently. And the turning plate can well guarantee the sealing performance of the centrifugal fan.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of fan, more specifically, it relates to a centrifugal fan. BACKGROUND

[0002] Centrifugal fan is the air treatment equipment that people commonly use, and the centrifugal fan usually comprises a motor, an impeller and a casing, the casing is usually provided with an air inlet and an air outlet, the impeller is usually composed of a rim and blades fixed on the rim, and the centrifugal fan is widely used in industrial ventilation due to its high flow advantage.

[0003] Since the industrial environment is usually dusty, a lot of dust will accumulate on the impeller of the centrifugal fan for industrial ventilation, and the accumulation of dust may cause the impeller to lose balance, so that the mass distribution of the impeller is uneven during rotation, which may cause vibration and noise and increase the wear of mechanical parts, thereby affecting the service life of the centrifugal fan, therefore, people need to frequently power off the centrifugal fan and then clean the impeller, and the centrifugal fan for industrial ventilation is usually large in size, so it is difficult to disassemble the impeller, and when cleaning the impeller, people usually directly use a water gun to aim at the air inlet of the centrifugal fan and use the water flow sprayed by the water gun to flush the impeller.

[0004] Since the outer ring of the impeller usually does not protrude into the air inlet, people need to insert the water gun into the air inlet and then aim the water gun at the blades of the impeller to flush the blades, the blades include an inner side and an outer side facing away from the air inlet, and using this method to flush the blades has the problem that the outer side of the blades is flushed to a small area, so that some dust still remains on the impeller.

[0005] Therefore, a new scheme is needed to solve this problem. CONTENT OF THE UTILITY MODEL

[0006] In view of the deficiencies in the prior art, the utility model aims to provide a centrifugal fan.

[0007] The above technical purpose of the utility model is realized by the following technical scheme: a centrifugal fan, comprising a motor, an impeller and a casing in the shape of a volute, the motor comprises an output shaft for fixed connection with the impeller, a flushing port is formed on the outer peripheral wall of the casing, a flap for closing the flushing port is rotatably connected to the casing, a fixing hoop for fixing a water gun is arranged on the flap, and a supporting rod for supporting the flap is arranged on the casing.

[0008] By adopting the technical scheme, the water flow in the water gun can directly wash the outer side of the impeller blade through the washing port, so that the dust on the outer side of the impeller blade is not easy to remain, and then the impeller can be better cleaned, and the turning plate capable of closing the washing port is not easy to affect the sealing property of the machine shell in the subsequent use of the centrifugal fan, and the setting of the fixing hoop and the supporting rod enables people to first fix the turning plate by using the supporting rod when washing the impeller, then fix the water gun on the fixing hoop, at this time, people can free their hands to rotate the impeller, so that the blades on the impeller can be better washed by the water flow of the water gun, and people have a better cleaning effect when cleaning the impeller.

[0009] The utility model further sets up: support rod rotation is connected on the machine shell, the turning plate is set up with the round hole that support rod inserts.

[0010] By adopting the technical scheme, the support rod rotationally connected with the machine shell is not easy to lose, and when the support rod supports up the turning plate, the round hole can better prevent the support rod from coming out, and better ensure the firmness of the turning plate and the support rod.

[0011] The utility model further sets up: the fixing hoop rotation is connected in the movable end of turning plate.

[0012] By adopting the technical scheme, when the position of the turning plate is fixed by the support rod, people can rotate the fixing hoop to realize that the water gun aims at different positions on the impeller, so that when people rotate the impeller, the water flow of the water gun can better wash the dust on the impeller.

[0013] The utility model further sets up: the outer peripheral wall of machine shell is fixedly connected with the rubber strip for abutting with the turning plate on one side close to the washing port, and the washing port is surrounded by the rubber strip.

[0014] By adopting the technical scheme, by setting the rubber strip, the better elasticity of the rubber strip enables it to better deform, the deformed rubber strip can better adhere to the turning plate, and when the turning plate covers the rubber strip, the external air is not easy to enter the washing port, so that the turning plate can better close the washing port, in addition, the vibration generated when the centrifugal fan operates can be better absorbed by the rubber strip, thereby better reducing the noise.

[0015] The utility model further sets up: the output shaft of motor is detachably connected with the crank handle, and the side away from the motor of the output shaft is provided with a square groove for being embedded by the crank handle.

[0016] By adopting the technical scheme, people can rotate the impeller through the handle, so that the water flow of the water gun can better wash each blade of the impeller, and the opening of the square groove enables the handle to better drive the impeller to rotate when the handle rotates, so that the impeller can be better stopped at a position when people find that the dust accumulated on the blades of some impellers is more and needs to be washed for a long time by the water gun, so that the impeller is not easy to rotate under the action force of the water flow of the water gun.

[0017] The utility model further sets up: the handle is integrative with ball convex, the inner wall of square groove is equipped with the inner groove for being inserted by ball convex.

[0018] By adopting the technical scheme, through the setting of the ball convex and the inner groove, when people insert the handle into the output shaft, the surface of the ball convex is in contact with the top surface of the output shaft, the force exerted by people on the handle generates a force that makes the ball convex deform under the guidance of the surface of the ball convex, and the deformed ball convex makes the handle enter the square groove more smoothly, the sound and vibration generated when the surface of the ball convex is in contact with the inner wall of the inner groove can better remind people that the handle has been installed in place, so that people do not need to put their head in to check, which provides better efficiency for the installation of the handle.

[0019] The utility model further sets up: the opposite two side walls of the shell are all fixedly connected with the fixed seat for placing the same handle.

[0020] By adopting the technical scheme, people can place the handle on the fixed seat after using the handle, so that the handle has a better storage place and is not easy to be lost due to inconvenient storage.

[0021] The utility model further sets up: the fixed seat is C-shaped, and the fixed seat is arranged close to the washing port.

[0022] By adopting the technical scheme, people can place the handle on the fixed seat after covering the flap, and the fixed seat arranged close to the washing port makes the handle in contact with the flap, and the flap is in contact with the rubber strip under the contact force of the handle, so that the closing of the washing port by the flap is better guaranteed, and people only need to place the handle on the fixed seat to complete the storage of the handle and the fixation of the washing port, so that people have better efficiency in closing the washing port.

[0023] In conclusion, the utility model has the following beneficial effects: when people clean the impeller, the turning plate covered on the flushing port can be opened, so that the water flow of the water gun can directly flush the outside of the impeller blade, the dust on the outside of the blade is not easy to remain, the impeller can be better cleaned, then people use the supporting rod to prop up the turning cover, the supporting rod makes people not need to prop up the turning plate by hand, then people can fix the water gun on the fixing hoop, the water gun fixed by the fixing hoop makes people can free the hands to rotate the impeller, the impeller is rotated through the crank handle, so that people can better control the rotating position of the impeller, further make the cleaning of the impeller has better effect. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the structure schematic view of the utility model;

[0025] Figure 2 It is the sectional view of the utility model, and is used for showing the state when the turning plate is opened;

[0026] Figure 3 It is Figure 2 The enlarged view of A part.

[0027] In the drawing: 1, impeller; 2, casing; 3, flushing port; 4, turning plate; 5, fixing hoop; 6 supporting rod; 7, round hole; 8, rubber strip; 9, square groove; 10, ball convex; 11, inner groove; 12, fixed seat; 13, crank handle. DETAILED DESCRIPTION

[0028] The utility model is described in detail in combination with the drawings and examples.

[0029] A centrifugal fan, as shown in Figure 1 And Figure 2 It includes motor, impeller 1 and the casing 2 of volute shape, the motor includes output shaft, the output shaft is fixed through the shaft coupling and impeller 1, the outer peripheral wall of casing 2 is set up with the circular flushing port 3, the turning plate 4 for closing flushing port 3 is hingedly connected on casing 2, the turning plate 4 includes fixed end and movable end, the fixed end is fixed through bolt and hinge, the fixing hoop 5 includes rotating seat, hoop and the fastening screw for adjusting the size of hoop, the fastening screw is located at the end of hoop far from rotating seat, the rotating seat is welded on the movable end of turning plate 4, the through hole is set up on hoop, the round groove is set up on rotating seat, the through hole and round groove are collectively passed through by the same bolt, the supporting rod 6 for supporting turning plate 4 is arranged on casing 2, the drain port is set up on the bottom surface of casing 2.

[0030] Supporting rod 6 is rotatably connected to casing 2, round hole 7 for being inserted by supporting rod 6 is formed in flap 4, fixed hoop 5 is arranged at the movable end of flap 4, the side of the outer circumferential wall of casing 2 close to flushing port 3 is pasted with adhesive tape 8 for abutting against flap 4, the thickness of adhesive tape 8 is greater than the diameter of supporting rod 6, flushing port 3 is surrounded by adhesive tape 8, the output shaft of motor is detachably connected with crank 13, crank 13 is made by bending round steel strip, the end of crank 13 close to output shaft is processed into square, the side of output shaft away from motor is formed with square slot 9 for being embedded by crank 13, one side wall of crank 13 is integrally formed with ball convex 10, the four inner walls of square slot 9 are all formed with inner slot 11 for being embedded by ball convex 10, the opposite two side walls of casing 2 are all welded with fixed seat 12 for placing the same crank 13, fixed seat 12 is in C shape, fixed seat 12 is arranged close to flushing port 3, when crank 13 is placed on fixed seat 12, crank 13 abuts flap 4 against adhesive tape 8.

[0031] Working process: after the centrifugal fan works for a period of time, people need to clean the impeller 1, people first cut off the power of the centrifugal fan, then use the water gun to flush the inside of the blade of the impeller 1, after the inside of the blade is flushed, people take off the ratchet wrench 13 placed on the fixed seat 12, at this time the ratchet wrench 13 no longer abuts against the flap 4, the abutting force of the ratchet wrench 13 against the flap 4 disappears, people can open the flap 4, then turn the support rod 6 connected with the shell 2 upward, then insert the support rod 6 into the round hole 7, the round hole 7 can better prevent the support rod 6 from coming out, better guarantee the firmness of the flap 4 and the support rod 6, then the head of the water gun is inserted through the opening of the hoop, the tightening screw is tightened, the hoop fixed by the tightening screw can prevent the water gun from being separated from the fixed hoop 5, then people can turn the fixed hoop 5 to the position needed, the rotatable fixed hoop 5 can better adjust the direction of the water flow of the water gun fixed thereon, then people can turn on the water gun, use the water flow of the water gun to flush the blades of the impeller 1, the flushing opening 3 is opened, so that people can directly use the water flow of the water gun to flush the outside of the blades of the impeller 1, so that the dust on the outside of the blades of the impeller 1 is not easy to stay, and the water gun fixed by the fixed hoop 5 can make people free their hands to rotate the impeller 1, then people insert the ratchet wrench 13 taken off before into the square groove 9 of the motor output shaft, by arranging the ball convex 10 and the inner groove 11, when people insert the ratchet wrench 13 into the output shaft, the surface of the ball convex 10 abuts against the top surface of the output shaft, the force exerted by people on the ratchet wrench 13 generates a force that makes the ball convex 10 deform under the guidance of the surface of the ball convex 10, the deformed ball convex 10 makes the ratchet wrench 13 enter the square groove 9 more smoothly, the arrangement of the ball convex 10 makes people insert the ratchet wrench 13 into the square groove 9 more quickly, when the ball convex 10 is embedded in the inner groove 11, the sound and vibration generated when the surface of the ball convex 10 abuts against the inner wall of the inner groove 11 can better remind people that the ratchet wrench 13 has been installed in place, and the inner groove 11 is arranged on the four inner walls of the square groove 9, so that people can embed the ball convex 10 in the inner groove 11 no matter which side the ball convex 10 faces when inserting the ratchet wrench 13 into the square groove 9, so that people do not need to put their heads into the air inlet to confirm the cooperation of the ratchet wrench 13 and the output shaft, which provides better efficiency for the installation of the ratchet wrench 13, finally people can shake the ratchet wrench 13, the ratchet wrench 13 drives the output shaft to rotate and in turn drives the impeller 1 to rotate, so that different blades of the impeller 1 can be better flushed by the water flow of the water gun, when people find that some blades of the impeller 1 have more dust accumulated and need to be flushed by the water gun for a long time, the impeller 1 can be stopped at a position, so that the impeller 1 is not easy to rotate under the action of the water flow of the water gun, the ratchet wrench 13 is used to control the rotation of the impeller 1, so that people do not need to use their hands to control the rotation of the impeller 1, which better protects the cleanliness of people's hands.

[0032] After people wash the impeller 1, people first close the water gun, then unscrew the fastening screw, then take out the water gun from the fixed hoop 5, pull out the support rod 6 from the round hole 7, then freely place the support rod 6 on the casing 2, the support rod 6 is rotatably connected with the casing 2, so that the support rod 6 is not easy to lose, then people cover the flap 4 on the flushing port 3, finally people place the removed crank 13 on the fixed seat 12, the C-shaped fixed seat 12 is formed with a cavity, the cavity can better fix the crank 13, the fixed seat 12 provides a better storage place for the crank 13, so that the crank 13 is not easy to lose due to random storage, the crank 13 in the fixed seat 12 tightly abuts the flap 4 against the rubber strip 8 under the action of gravity, the mutually abutting flap 4 and rubber strip 8 better ensure that the flap 4 closes the flushing port 3, so that the flushing port 3 is not easy to affect the sealing performance of the centrifugal fan, people only need to place the crank 13 on the fixed seat 12 to complete the storage of the crank 13 and the fixation of the flushing port 3, so that people have better efficiency in closing the flushing port 3, in addition, the setting of the rubber strip 8 makes the vibration generated by the centrifugal fan during operation better absorbed by the rubber strip 8, thereby better reducing the noise.

[0033] The preferred embodiments of the utility model are described above, the protection scope of the utility model is not only limited to the above-mentioned embodiments, any technical scheme belonging to the utility model idea is also within the protection scope of the utility model. It should be noted that for ordinary skilled people in the technical field, some improvements and decorations without departing from the principle of the utility model are also considered as the protection scope of the utility model.

Claims

1. A centrifugal fan comprising a motor, an impeller (1) and a casing (2) in the form of a volute, the motor comprising an output shaft for fixed connection with the impeller (1), characterised in that: The peripheral wall of the casing (2) is provided with a flushing opening (3), the casing (2) is rotatably connected with a flap (4) for closing the flushing opening (3), the flap (4) is provided with a fixing hoop (5) for fixing a water gun, the casing (2) is provided with a supporting rod (6) for supporting the flap (4).

2. A centrifugal fan as claimed in claim 1, characterized in that: The supporting rod (6) is rotatably connected with the casing (2), and the flap (4) is provided with a round hole (7) for being inserted by the supporting rod (6).

3. A centrifugal fan as claimed in claim 2, characterised in that: The fixing hoop (5) is rotatably connected with the movable end of the flap (4).

4. A centrifugal fan as claimed in claim 3, characterised in that: The peripheral wall of the casing (2) is fixedly connected with a rubber strip (8) for abutting against the flap (4) near the flushing opening (3), and the flushing opening (3) is surrounded by the rubber strip (8).

5. A centrifugal fan as claimed in claim 1, characterized in that: The output shaft of the motor is detachably connected with a crank handle (13), and the side, away from the motor, of the output shaft is provided with a square groove (9) for being embedded by the crank handle (13).

6. A centrifugal fan as claimed in claim 5, characterised in that: The crank handle (13) is integrally formed with a ball convex (10), and the inner wall of the square groove (9) is provided with an inner groove (11) for being embedded by the ball convex (10).

7. A centrifugal fan as claimed in claim 6, characterised in that: The opposite two side walls of the casing (2) are both fixedly connected with a fixing seat (12) for placing the same crank handle (13).

8. A centrifugal fan according to claim 7, characterised in that: The fixing seat (12) is in C shape, and the fixing seat (12) is arranged near the flushing opening (3), when the crank handle (13) is placed on the fixing seat (12), the crank handle (13) abuts the flap (4) against the rubber strip (8).

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