A fan for an oil fume purifier

Abstract

This invention discloses a fan for an oil fume purifier, comprising a housing, a mounting mechanism, two fixing mechanisms, and two connecting mechanisms. The mounting mechanism is located at one end of the housing, the two fixing mechanisms are located on both sides of the housing, and the two connecting mechanisms are located at the bottom of the housing. The beneficial effects of this invention are: by installing a spring between the housing and the mounting wall, the fan is buffered, thereby reducing the vibration amplitude of the housing. Reducing the vibration amplitude of the housing decreases the impact strength between the fan housing and the wall, thus reducing wear during use and extending the service life of the fan. Furthermore, it reduces the noise during operation, making the fan quieter and more environmentally friendly.

Description

Technical Field

[0001] This invention relates to a fan, specifically a fan for an oil fume purifier, and belongs to the field of fan application technology. Background Technology

[0002] An oil fume purifier is a device for treating oily fumes and exhaust gases. It is mainly used for purifying and treating oily fumes emitted from kitchens at low altitudes. Generally, oil fume purifiers do not have a power system, meaning they cannot extract oily fumes and cannot be used alone. They must be used in conjunction with a fan to ensure the oil fume purification effect and the smooth discharge of kitchen fumes. When installing an oil fume purifier, the fan needs to be connected to the exhaust duct.

[0003] However, existing fans have significant drawbacks when connected to fume purifiers. They lack vibration damping devices, resulting in large vibration amplitudes and high noise levels. They also tend to sway from side to side, causing the connecting nuts to loosen and shortening their lifespan. Furthermore, they cannot securely fasten the connection between the exhaust duct and the air inlet, leading to poor sealing and reduced ventilation efficiency. Summary of the Invention

[0004] To address the problems in the prior art, the present invention provides a fan for an oil fume purifier.

[0005] A fan for an oil fume purifier includes a housing, a mounting mechanism, two fixing mechanisms, and two connecting mechanisms. The mounting mechanism is located at one end of the housing, the two fixing mechanisms are located on both sides of the housing, and the two connecting mechanisms are located at the bottom of the housing. A motor is installed on one side of the housing, and an impeller is installed inside the housing. The motor is connected to the impeller via a rotating shaft. An air inlet is installed on one side of the housing, and an air outlet is installed at one end of the housing.

[0006] The installation mechanism includes a mounting plate, a damping plate, and a connecting plate. The damping plate is located between the mounting plate and the connecting plate. Two springs are installed between the damping plate and the connecting plate. Two fixing posts are provided between the mounting plate and the damping plate. A base plate is installed in the middle of one side of the damping plate. A top plate is installed in the middle of one side of the connecting plate. A rotating wheel is provided on the side of the top plate away from the base plate. A lead screw is connected to one end of the rotating wheel. A sliding rod is provided at the end of the lead screw away from the rotating wheel. Limit rings are installed at both ends of the sliding rod. One of the limit rings is fixedly connected to the lead screw. The lead screw passes through the top plate. A screw hole is provided in the middle of the top plate. The screw hole is threaded with the lead screw. The sliding rod passes through the base plate. The outer shell is fixedly connected to the connecting plate.

[0007] Preferably, the outer shell is welded to one side of the connecting plate, and guide posts are installed inside both ends of the two springs. The four guide posts are welded to both ends of the damping plate and both ends of the connecting plate, respectively. One end of the two fixing posts is welded to the mounting plate, and the other end of the two fixing posts is welded to the damping plate.

[0008] Preferably, one of the limiting rings is welded to the lead screw, and the base plate is located between the two limiting rings.

[0009] Preferably, the fixing mechanism includes a second fixing column, two fixing frames and a first connecting frame. The two fixing frames are welded to the upper end face of the second fixing column, the first connecting frame is located on one side of the second fixing column, and the second fixing column is welded to the outer shell.

[0010] Preferably, the cross-section of the connecting frame one is an inverted "U" shape, and movable columns are welded to both ends of the bottom of the connecting frame one. The cross-section of the fixed frame is an inverted "L" shape, and the two movable columns pass through the top of the two fixed frames respectively.

[0011] Preferably, two springs are provided between the connecting frame and the fixed frame, and two movable columns pass through the two springs respectively. A limit block passes through the side of the movable column away from the connecting frame, and one end of the movable column is welded to the inside of the limit block.

[0012] Preferably, the connecting mechanism includes a fixed plate, a second connecting frame, and two retaining rings. The second connecting frame is located on one side of the fixed plate, and both retaining rings are located inside the second connecting frame. A slot is provided on one side of the second connecting frame, and the cross-section of the first slot is "L"-shaped. A second slot is provided at the top of the first slot, and one end of each of the two retaining rings is located inside the first slot. A connecting block is installed on the top of each of the two retaining rings, and both connecting blocks are located inside the second slot. A second motor is installed at one end of the second connecting frame, and the second motor is connected to a double-acting screw via a rotating shaft. The two ends of the double-acting screw pass through the two connecting blocks respectively. A screw hole is provided in the middle of the connecting block, and the two screw holes are threaded to the two ends of the double-acting screw respectively.

[0013] Preferably, a movable frame is installed on the side of the fixed plate away from the retaining ring. The movable frame has a "U" shaped cross-section. A rotating wheel is installed on the side of the movable frame away from the fixed plate. One end of the rotating wheel is connected to a lead screw. A movable block is provided on the side of the lead screw away from the rotating wheel. The end of the movable frame away from the rotating wheel is welded to the fixed plate. The movable block has a "T" shaped cross-section. The top of the movable block slides along the upper surface of the movable frame. A bearing is installed at the bottom of the movable frame. The end of the lead screw away from the rotating wheel rotates in the middle of the bearing. A screw hole is provided in the middle of one end of the movable frame. The screw hole is threaded with the lead screw. A telescopic column is provided between the movable block and the connecting frame. The two ends of the telescopic column are welded to the movable block and the connecting frame, respectively. The telescopic column penetrates the bottom of the fixed plate and slides inside the fixed plate.

[0014] Preferably, a lifting mechanism is provided on both sides of the outer casing. The lifting mechanism includes a lifting frame, a motor three, and a lead screw three. The motor three is installed on the top of the lifting frame and is connected to the lead screw three through a rotating shaft. A slide rod two is provided on one side of the lead screw three. The top of the lifting frame is welded to one side of the outer casing. The cross-section of the fixing plate is an inverted "L" shape. The lead screw three and the slide rod two pass through the top of the fixing plate. A screw hole is provided on the top of the fixing plate, and the screw hole is threadedly engaged with the lead screw three.

[0015] Preferably, the method of using this fan specifically includes the following steps:

[0016] Step 1: Install the mounting plate and connecting bracket on the wall using expansion bolts. Place the exhaust pipe between the fume purifier and the fan. Connect the exhaust pipe to the air inlet of the fan using nuts to secure the fan.

[0017] Step Two: The motor drives the shaft to rotate the lead screw, which engages with the screw hole on the top of the fixed plate. The fixed plate slides along the slide bar, causing the retaining rings to rise and fall via the telescopic column and connecting frame two. This ensures the four retaining rings in the two connecting mechanisms and the connection point between the exhaust pipe and the air inlet are at the same height. The rotating wheel drives the lead screw to rotate, which engages with the screw hole in the middle of one end of the movable frame. The end of the lead screw away from the rotating wheel rotates to the middle of the bearing mounted on the movable frame. The movable frame, telescopic column, and connecting frame two then move the retaining rings left and right. The motor drives the shaft to rotate the bidirectional lead screw, whose two ends engage with the screw holes in the middle of the two connecting blocks, causing the retaining rings to move closer or further away. This secures the four retaining rings in the two connecting mechanisms to the connection point between the exhaust pipe and the air inlet, completing the installation of the fan.

[0018] Step 3: The motor drives the shaft to rotate the impeller inside the casing, causing the gas to rotate at high speed under the impeller's push. This allows the gas to gain a large amount of energy, and under the action of inertial centrifugal force, it is thrown towards the outer edge of the impeller. After the gas's pressure energy and kinetic energy increase, it flows out of the casing. A negative pressure is formed in the middle of the impeller, and under the action of atmospheric pressure, gas is continuously drawn in to replenish it. The high-speed rotating impeller accelerates the gas, and then decelerates and changes its flow direction inside the casing, converting kinetic energy into pressure energy. The impeller generates centrifugal force when rotating, throwing the air out of the impeller, collecting it in the casing, increasing the pressure, and discharging it from the air outlet. Then, the air treated in the fume purifier is drawn out by the fan and discharged into the atmosphere.

[0019] The beneficial effects of this invention are:

[0020] (1) When the fan is performing ventilation operation, a spring is installed between the outer casing and the mounting wall to buffer the fan, thereby reducing the vibration amplitude of the outer casing. By reducing the vibration amplitude of the outer casing, on the one hand, the collision intensity between the fan casing and the wall can be reduced, thereby reducing the wear of the fan during use and extending the service life of the fan. On the other hand, the noise of the fan during operation can be reduced, making the fan quieter and more environmentally friendly. By rotating the wheel, the connecting plate moves back and forth, squeezing the spring. On the one hand, the elasticity of the spring can be improved, so that the spring can maintain a good shock absorption effect. On the other hand, the spring is more durable, thereby further extending the service life of the fan. At the same time, by making the spring more durable, the cost of later maintenance and replacement of the spring can also be reduced.

[0021] (2) When the fan is working, by setting spring 2 between the fixed frame and the connecting frame 1, the fan is shock-absorbing and buffered, which can effectively prevent the screws on the fan casing from loosening due to the shaking of the fan during operation, thereby improving the firmness of the fan installation and use, and thus improving the reliability of the fan operation. By using spring 2, the shock absorption and noise reduction effect of the fan can be further improved. By setting the movable column, on the one hand, the connection between the fixed frame and the connecting frame 1 is made more firm, thereby enhancing the stability of the fan installation. On the other hand, it can ensure that spring 2 will not deflect when under force, thereby reducing the damage to spring 2 when buffering the fan, thus making spring 2 more durable, thereby further extending the service life of the fan. The limit block on one side of the fixed frame plays a blocking role, which can prevent the movable column from falling off the fixed frame when it extends and retracts inside the fixed frame, thereby making the installation and use of the fan more reliable.

[0022] (3) In this invention, by rotating the two rotating wheels, the retaining rings on the two connecting mechanisms are moved. By moving the retaining rings on the two connecting mechanisms, the four retaining rings on the two connecting mechanisms are clamped and fixed at the connection between the exhaust pipe and the air inlet, thereby making the connection between the exhaust pipe and the air inlet tighter, thus enhancing the sealing between the exhaust pipe and the air inlet and improving the ventilation efficiency of the fan. By driving the bidirectional screw to rotate by the motor, the distance between the two retaining rings on the connecting mechanism can be changed. By changing the distance between the two retaining rings on the connecting mechanism, the connecting mechanism can be adapted to exhaust pipes of different thicknesses, thereby improving the compatibility of the fan installation. By driving the screw to rotate by the motor, the position of the connecting mechanism can be adjusted up and down. By adjusting the position of the connecting mechanism up and down, the connecting mechanism can be moved in the opposite direction away from the air inlet, providing more operating space for the installation of the exhaust pipe, thereby improving the convenience of the fan installation. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 This is a schematic diagram showing the connection between the outer casing and the motor in this invention.

[0026] Figure 3 This is a schematic diagram of the connection between the outer casing and the impeller in this invention.

[0027] Figure 4 This is a schematic diagram of the installation mechanism in this invention.

[0028] Figure 5 This is a schematic diagram showing the connection between the lead screw and the slide bar in this invention.

[0029] Figure 6 This is a schematic diagram of the mounting plate, shock-absorbing plate, and connecting plate in this invention.

[0030] Figure 7 This is a schematic diagram of the fixing mechanism in this invention.

[0031] Figure 8 This is a schematic diagram of the connection mechanism in this invention.

[0032] Figure 9 This is a two-section view of the connecting frame in this invention.

[0033] Figure 10 This is a schematic diagram of the connection between the retaining ring and the connecting block in this invention.

[0034] Figure 11 This is a schematic diagram of the connection between the second motor and the bidirectional lead screw in this invention.

[0035] Figure 12 This is a schematic diagram of the lifting mechanism in this invention.

[0036] In the diagram: 1. Outer casing; 2. Motor 1; 3. Impeller; 4. Air inlet; 5. Air outlet; 6. Mounting mechanism; 601. Mounting plate; 602. Vibration damping plate; 603. Connecting plate; 604. Fixed column 1; 605. Guide column; 606. Spring 1; 607. Base plate; 608. Top plate; 609. Rotary wheel 1; 610. Lead screw 1; 611. Slide rod 1; 612. Limiting ring; 7. Fixing mechanism; 701. Fixed column 2; 702. Fixing frame; 703. Connecting frame 1; 704. Movable... 705. Moving column; 706. Spring 2; 707. Limiting block; 8. Connecting mechanism; 801. Movable frame; 802. Fixed plate; 803. Rotary wheel 2; 804. Lead screw 2; 805. Movable block; 806. Telescopic column; 807. Connecting frame 2; 8071. Groove 1; 8072. Groove 2; 808. Snap ring; 809. Connecting block; 810. Motor 2; 811. Bidirectional lead screw; 9. Lifting mechanism; 901. Lifting frame; 902. Motor 3; 903. Lead screw 3; 904. Slide rod 2. Detailed Implementation

[0037] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0038] like Figures 1-12 As shown, a fan for an oil fume purifier includes a housing 1, a mounting mechanism 6, two fixing mechanisms 7, and two connecting mechanisms 8. The mounting mechanism 6 is located at one end of the housing 1, the two fixing mechanisms 7 are located on both sides of the housing 1, and the two connecting mechanisms 8 are located below the housing 1. A motor 2 is installed on one side of the housing 1, and an impeller 3 is installed inside the housing 1. The motor 2 is connected to the impeller 3 through a rotating shaft. An air inlet 4 is installed on one side of the housing 1, and an air outlet 5 is installed at one end of the housing 1. The air inlet 4 is connected to the exhaust pipe. The motor 2 drives the rotating shaft to rotate the impeller 3 inside the housing 1, causing the gas to rotate at high speed under the push of the impeller 3. The gas is drawn into the impeller 3 through the air inlet 4 and then discharged into the atmosphere through the air outlet 5.

[0039] The installation mechanism 6 includes a mounting plate 601, a damping plate 602, and a connecting plate 603. The damping plate 602 is located between the mounting plate 601 and the connecting plate 603. Two springs 606 are installed between the damping plate 602 and the connecting plate 603. The mounting plate 601 is mounted on the wall using expansion bolts to fix the fan. When the fan is performing ventilation, the rotation of the impeller 3, the generation of eddies in the impeller 3, and the resonance of the outer casing 1 all generate noise. By compressing the springs 606 and cooperating with the sliding rod 611 sliding on the base plate 607, a buffering effect is achieved between the outer casing 1 and the mounting wall, thereby reducing the resonance between the impeller 3 and the outer casing 1 when the impeller 3 rotates, thus reducing the vibration amplitude of the fan and reducing the noise during operation. Two fixing columns 604 are provided between the mounting plate 601 and the damping plate 602. The base plate 607 is installed in the middle of one side of the damping plate 602. A top plate 608 is installed on the side center. A rotating wheel 609 is provided on the side of the top plate 608 away from the bottom plate 607. A lead screw 610 is connected to one end of the rotating wheel 609. A sliding rod 611 is provided at the end of the lead screw 610 away from the rotating wheel 609. Limiting rings 612 are installed at both ends of the sliding rod 611. One of the limiting rings 612 is fixedly connected to the lead screw 610. The lead screw 610 passes through the top plate 608. A section is provided in the middle of the top plate 608. There is a screw hole, which is threaded into the lead screw 610. The slide rod 611 passes through the base plate 607. The outer shell 1 is fixedly connected to the connecting plate 603. Rotating the rotating wheel 609 drives the lead screw 610 to rotate. The rotating lead screw 610 is threaded into the screw hole in the middle of the top plate 608, causing the top plate 608 to drive the connecting plate 603 to move back and forth, compressing the spring 606 and changing the degree of deformation of the spring 606, thereby keeping the spring 606 elastic.

[0040] In one optional embodiment of the present invention, the outer shell 1 is welded to one side of the connecting plate 603. Guide posts 605 are installed inside both ends of the two springs 606. The four guide posts 605 are respectively welded to both ends of the damping plate 602 and both ends of the connecting plate 603. The springs 606 are connected to the damping plate 602 and the connecting plate 603 through the guide posts 605, which ensures the stability of the connecting plate 603 and reduces the vibration of the connecting plate 603. One end of the two fixing posts 604 is welded to the mounting plate 601, and the other end of the two fixing posts 604 is welded to the damping plate 602. The mounting plate 601 is connected to the damping plate 602 through the two fixing posts 604 to fix the damping plate 602.

[0041] In one optional embodiment of the present invention, one of the limiting rings 612 is welded to the lead screw 610, making the connection between the limiting ring 612 and the lead screw 610 more secure. The base plate 607 is located between the two limiting rings 612. An opening is provided in the middle of the base plate 607, and a plurality of balls are installed inside the opening. The plurality of balls slide along the outer surface of the slide rod 611. When the slide rod 611 slides along the base plate 607, the balls can reduce the friction between the slide rod 611 and the base plate 607, thereby extending the service life of the fan.

[0042] In an optional embodiment of the present invention, the fixing mechanism 7 includes a second fixing post 701, two fixing frames 702, and a first connecting frame 703. The two fixing frames 702 are welded to the upper end face of the second fixing post 701, and the first connecting frame 703 is located on one side of the second fixing post 701. The second fixing post 701 is welded to the outer shell 1, so that the two fixing frames 702 are fixed by the second fixing post 701, thereby improving the stability of the second fixing frame 702.

[0043] In one optional embodiment of the present invention, the cross-section of the connecting frame 703 is an inverted "U" shape, and movable columns 704 are welded to both ends of the bottom of the connecting frame 703. The cross-section of the fixed frame 702 is an inverted "L" shape. The two movable columns 704 pass through the top of the two fixed frames 702 respectively. The two movable columns 704 can extend and retract inside the fixed frames 702 respectively, improving the flexibility of the movable columns 704 during operation. The top of the fixed frame 702 has an opening, and several ball bearings are installed inside the opening. The ball bearings slide along the outer surface of the movable columns 704 respectively. When the movable columns 704 move on the top of the fixed frames 702, the ball bearings can reduce the friction between the movable columns 704 and the fixed frames 702, extending the service life of the fan.

[0044] In one optional embodiment of the present invention, two springs 705 are provided between the connecting frame 703 and the fixed frame 702. Two movable columns 704 pass through the two springs 705 respectively. A limiting block 706 passes through the side of the movable column 704 away from the connecting frame 703. One end of the movable column 704 is welded to the inside of the limiting block 706. The connecting frame 703 is fixed to the wall using expansion wires. The two fixed columns 701 are fixed to both sides of the outer box 1 respectively. When the fan is working and the outer shell resonates, the springs 705 are compressed between the fixed frame 702 and the connecting frame 703 and then released, so that it cannot be stabilized immediately. In conjunction with the movable column 704 extending and retracting inside the fixed frame 702, it plays a role in shock absorption and buffering, while making the connection between the fixed frame 702 and the connecting frame 703 firm. At the same time, with the help of the limiting block 706, it can prevent the movable column 704 from falling off the fixed frame 702 when it extends and retracts inside the fixed frame 702.

[0045] In an optional embodiment of the present invention, the connecting mechanism 8 includes a fixing plate 802, a second connecting frame 807, and two retaining rings 808. The second connecting frame 807 is located on one side of the fixing plate 802, and both retaining rings 808 are located inside the second connecting frame 807. A first slot 8071 is formed on one side of the second connecting frame 807, and the cross-section of the first slot 8071 is "L"-shaped. A second slot 8072 is formed at the top of the first slot 8071. One end of each of the two retaining rings 808 is located inside the first slot 8071. A connecting block 809 is installed on the top of each of the two retaining rings 808. Inside the slot 2 8072, a motor 2 810 is installed at one end of the connecting frame 2 807. The motor 2 810 is connected to a double-acting screw 811 via a rotating shaft. The two ends of the double-acting screw 811 pass through two connecting blocks 809 respectively. A screw hole is provided in the middle of the connecting block 809. The two screw holes are threadedly engaged with the two ends of the double-acting screw 811 respectively. The motor 2 810 drives the rotating shaft to drive the double-acting screw 811. The two ends of the rotating double-acting screw 811 are threadedly engaged with the screw holes provided in the middle of the two connecting blocks 809 respectively, thereby causing the two retaining rings 808 to move closer or further apart, thereby changing the distance between the two retaining rings 808.

[0046] In one optional embodiment of the present invention, a movable frame 801 is installed on the side of the fixed plate 802 away from the retaining ring 808. The movable frame 801 has a U-shaped cross-section. A rotating wheel 803 is installed on the side of the movable frame 801 away from the fixed plate 802. One end of the rotating wheel 803 is connected to a lead screw 804. A movable block 805 is provided on the side of the lead screw 804 away from the rotating wheel 803. The end of the movable frame 801 away from the rotating wheel 803 is welded to the fixed plate 802. The movable block 805 has a U-shaped cross-section. The T-shaped structure has a sliding top of the movable block 805 along the upper surface of the movable frame 801. Ball bearings are installed at both ends of the movable block 805 near the movable frame 801. These balls roll along the upper surface of the movable frame 801, reducing friction between the movable block 805 and the movable frame 801 and extending the service life of the device. A bearing is installed at the bottom of the movable frame 801, and the end of the lead screw 804 furthest from the rotating wheel 803 rotates in the middle of the bearing. A screw hole is provided at the middle of one end of the screw rod, which is threaded into the lead screw 804. A telescopic column 806 is provided between the movable block 805 and the connecting frame 807. The two ends of the telescopic column 806 are welded to the movable block 805 and the connecting frame 807, respectively. The telescopic column 806 penetrates the bottom of the fixed plate 802 and slides inside the fixed plate 802. An opening is provided at the bottom of the fixed plate 802, and several ball bearings are installed inside the opening. The ball bearings roll along the outer surface of the telescopic column 806. When the ball bearing slides inside the fixed plate 802, it can reduce the friction between the telescopic column 806 and the fixed plate 802, thus extending the service life of the equipment. The rotating wheel 803 drives the lead screw 804 to rotate. The rotating lead screw 804 is threadedly engaged with the screw hole in the middle of one end of the movable frame 801. The end of the lead screw 804 away from the rotating wheel 803 rotates and is mounted on the middle of the bearing on the movable frame 801. The movable frame 801, the telescopic column 806 and the connecting frame 807 drive the retaining ring 808 to move left and right.

[0047] In one optional embodiment of the present invention, lifting mechanisms 9 are provided on both sides of the outer casing 1. The lifting mechanism 9 includes a lifting frame 901, a motor 902, and a lead screw 903. The motor 902 is mounted on the top of the lifting frame 901 and connected to the lead screw 903 via a rotating shaft. A sliding rod 904 is provided on one side of the lead screw 903. The top of the lifting frame 901 is welded to one side of the outer casing 1. The fixed plate 802 has an inverted "L" shaped cross-section. The lead screw 903 and the sliding rod 904 penetrate the top of the fixed plate 802. A screw hole is provided on the top of the fixed plate 802, and the screw hole connects to the lead screw 903. 3. Threaded engagement: An opening is provided on one side of the threaded hole, and several balls are installed inside the opening. These balls roll along the outer surface of the slide rod 904. When the fixed plate 802 slides along the slide rod 904, the balls reduce the friction between the fixed plate 802 and the slide rod 904, extending the service life of the fan. The motor 902 drives the shaft to rotate the lead screw 903. The rotating lead screw 903 engages with the threaded hole on the top of the fixed plate 802. Combined with the sliding of the fixed plate 802 along the slide rod 904, the fixed plate 802 drives the retaining ring 808 to rise and fall through the telescopic column 806 and the connecting frame 807.

[0048] In an optional embodiment of the present invention, the method of using the fan specifically includes the following steps:

[0049] Step 1: Install the mounting plate 601 and the connecting bracket 703 on the wall using expansion bolts. Place the exhaust pipe between the fume purifier and the fan. Connect the exhaust pipe to the air inlet 4 of the fan using nuts to fix the fan.

[0050] Step Two: Motor 3 902 drives the rotating shaft to rotate the lead screw 3 903. The rotating lead screw 3 903 engages with the threaded hole on the top of the fixed plate 802. Combined with the sliding of the fixed plate 802 along the slide rod 2 904, the fixed plate 802, through the telescopic column 806 and the connecting frame 2 807, causes the retaining rings 808 to rise and fall, ensuring that the four retaining rings 808 in the two connecting mechanisms 8 and the connection point between the exhaust pipe and the air inlet 4 are at the same height. The rotating wheel 2 803 drives the lead screw 2 804 to rotate. The rotating lead screw 2 804 engages with the threaded hole in the middle of one end of the movable frame 801. Combined with the end of the lead screw 2 804 away from the rotating wheel 2 803 rotating... The bearing is installed in the middle of the movable frame 801. The movable frame 801, telescopic column 806 and connecting frame 807 drive the retaining ring 808 to move left and right. Then, the motor 810 drives the rotating shaft to drive the double screw 811. The two ends of the rotating double screw 811 are respectively threaded with the screw holes in the middle of the two connecting blocks 809, thereby driving the two retaining rings 808 to move closer or further away. This makes the four retaining rings 808 in the two connecting mechanisms 8 clamp the connection between the exhaust pipe and the air inlet 4, thus completing the installation of the fan. By clamping the connection between the exhaust pipe and the air inlet 4, the sealing between the exhaust pipe and the air inlet 4 is enhanced, and the exhaust efficiency of the fan is improved.

[0051] Step 3: Motor 2 drives the shaft to rotate the impeller 3 inside the casing 1, causing the gas to rotate at high speed under the push of the impeller 3. This allows the gas to gain a large amount of energy. Under the action of inertial centrifugal force, the gas is thrown towards the outer edge of the impeller 3. After the pressure energy and kinetic energy of the gas increase, it flows out from the casing 1. A negative pressure is formed in the middle of the impeller 3, and gas is continuously drawn in to replenish it under the action of atmospheric pressure. The high-speed rotating impeller 3 accelerates the gas, and then decelerates and changes its flow direction inside the casing 1, converting kinetic energy into pressure energy. The centrifugal force generated by the rotation of the impeller 3 throws the air out of the impeller 3, which is collected in the casing and pressurized, and discharged from the air outlet 5. The air treated in the fume purifier is then drawn out by the fan and discharged into the atmosphere, which is beneficial to environmental protection.

[0052] When in use, first, install the mounting plate 601 and the connecting bracket 703 on the wall using expansion bolts. Place the exhaust pipe between the fume purifier and the fan. Connect the exhaust pipe to the air inlet 4 of the fan with nuts to fix the fan.

[0053] Next, motor 3902 drives the rotating shaft to rotate lead screw 3903. The rotating lead screw 3903 engages with the threaded hole on the top of the fixed plate 802. Combined with the sliding of the fixed plate 802 along the slide rod 2904, the fixed plate 802 drives the retaining ring 808 to rise and fall through the telescopic column 806 and the connecting frame 2907. This ensures that the four retaining rings 808 in the two connecting mechanisms 8 and the connection point between the exhaust pipe and the air inlet 4 are at the same height. The rotating wheel 2803 drives lead screw 2804 to rotate. The rotating lead screw 2804 engages with the threaded hole in the middle of one end of the movable frame 801. Combined with the rotation of the end of lead screw 2804 away from the rotating wheel 2803, the screw rotates. The bearing is installed in the middle of the movable frame 801. The movable frame 801, telescopic column 806 and connecting frame 807 drive the retaining ring 808 to move left and right. Then, the motor 810 drives the rotating shaft to drive the double screw 811. The two ends of the rotating double screw 811 are respectively threaded with the screw holes in the middle of the two connecting blocks 809, thereby driving the two retaining rings 808 to move closer or further away. This makes the four retaining rings 808 in the two connecting mechanisms 8 clamp the connection between the exhaust pipe and the air inlet / outlet 4, thus completing the installation of the fan. By clamping the connection between the exhaust pipe and the air inlet 4, the sealing between the exhaust pipe and the air inlet 4 is enhanced, and the exhaust efficiency of the fan is improved.

[0054] Finally, motor 2 drives the shaft to rotate the impeller 3 inside the casing 1, causing the gas to rotate at high speed under the push of the impeller 3. This allows the gas to gain a large amount of energy, and under the action of inertial centrifugal force, it is thrown towards the outer edge of the impeller 3. After the pressure energy and kinetic energy of the gas increase, it flows out from the casing 1. A negative pressure is formed in the middle of the impeller 3, and under the action of atmospheric pressure, gas is continuously drawn in to replenish it. The high-speed rotating impeller 3 accelerates the gas, and then decelerates and changes its flow direction inside the casing 1, converting kinetic energy into pressure energy. The impeller 3 generates centrifugal force when rotating, throwing the air out of the impeller 3, collecting it in the casing to increase the pressure, and discharging it from the air outlet 5. Then, the air treated in the fume purifier is drawn out by the fan and discharged into the atmosphere, which is beneficial to environmental protection.

[0055] When the fan is performing ventilation operations, a spring 606 is installed between the outer casing 1 and the mounting wall to buffer the fan, thereby reducing the vibration amplitude of the outer casing 1. By reducing the vibration amplitude of the outer casing 1, the collision intensity between the fan casing 1 and the wall can be reduced, thus reducing wear during the use of the fan and extending its service life. On the other hand, the noise of the fan during operation can be reduced, making the fan quieter and more environmentally friendly. The rotation of the roller 609 drives the connecting plate 603 to move back and forth, compressing the spring 606. This improves the elasticity of the spring 606, allowing it to maintain a good shock absorption effect. It also makes the spring 606 more durable, further extending the service life of the fan. At the same time, making the spring 606 more durable can also reduce the cost of later maintenance and replacement of the spring 606.

[0056] When the fan is in operation, a second spring 705 is installed between the fixed frame 702 and the connecting frame 703 to dampen the fan and prevent the screws on the fan housing 1 from loosening due to the fan's shaking during operation. This improves the stability of the fan installation and enhances its operational reliability. The second spring 705 further improves the fan's vibration damping and noise reduction effect. The movable column 704 makes the connection between the fixed frame 702 and the connecting frame 703 more secure, thereby enhancing the stability of the fan installation. On the other hand, it ensures that the second spring 705 will not deflect under force, thus reducing the damage to the second spring 705 during the damping of the fan and making the second spring 705 more durable, thereby further extending the service life of the fan. The limiting block 706 acts as a shield on one side of the fixed frame 702, preventing the movable column 704 from falling off the fixed frame 702 when it extends or retracts inside the fixed frame 702, thus making the installation and use of the fan more reliable.

[0057] In this invention, rotating two rotating wheels 803 moves the retaining rings 808 on the two connecting mechanisms 8. By moving the retaining rings 808 on the two connecting mechanisms 8, the four retaining rings 808 on the two connecting mechanisms 8 clamp and fix the connection between the exhaust pipe and the air inlet 4, thereby making the connection between the exhaust pipe and the air inlet 4 tighter, enhancing the sealing between the exhaust pipe and the air inlet 4, and improving the ventilation efficiency of the fan. By driving the bidirectional lead screw 811 to rotate by the motor 810, the distance between the two retaining rings 808 on the connecting mechanism 8 can be changed. By changing the distance between the two retaining rings 808 on the connecting mechanism 8, the connecting mechanism 8 can be adapted to exhaust pipes of different thicknesses, thereby improving the compatibility of the fan installation. By driving the lead screw 903 to rotate by the motor 902, the position of the connecting mechanism 8 can be adjusted up and down. By adjusting the position of the connecting mechanism 8 up and down, the connecting mechanism 8 can be moved away from the air inlet 4, providing more operating space for the installation of the exhaust pipe, thereby improving the convenience of the fan installation.

[0058] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fan for an oil fume purifier, comprising a housing (1), a mounting mechanism (6), two fixing mechanisms (7) and two connecting mechanisms (8), characterized in that: The mounting mechanism (6) is located at one end of the outer shell (1), the two fixing mechanisms (7) are located on both sides of the outer shell (1), the two connecting mechanisms (8) are located below the outer shell (1), a motor (2) is installed on one side of the outer shell (1), an impeller (3) is installed inside the outer shell (1), the motor (2) is connected to the impeller (3) through a rotating shaft, an air inlet (4) is installed on one side of the outer shell (1), and an air outlet (5) is installed at one end of the outer shell (1). The installation mechanism (6) includes an installation plate (601), a damping plate (602), and a connecting plate (603). The damping plate (602) is located between the installation plate (601) and the connecting plate (603). Two springs (606) are installed between the damping plate (602) and the connecting plate (603). Two fixing posts (604) are provided between the installation plate (601) and the damping plate (602). A base plate (607) is installed in the middle of one side of the damping plate (602). A top plate (608) is installed in the middle of one side of the connecting plate (603). The side of the top plate (608) away from the base plate (607) has a... A rotating wheel (609) is provided with a lead screw (610) connected to one end of the rotating wheel (609). A sliding rod (611) is provided at the end of the lead screw (610) away from the rotating wheel (609). Limiting rings (612) are installed at both ends of the sliding rod (611). One of the limiting rings (612) is fixedly connected to the lead screw (610). The lead screw (610) passes through the top plate (608). A screw hole is provided in the middle of the top plate (608). The screw hole is threaded with the lead screw (610). The sliding rod (611) passes through the bottom plate (607). The outer shell (1) is fixedly connected to the connecting plate (603). The outer shell (1) is welded to one side of the connecting plate (603). Guide posts (605) are installed inside both ends of the two springs (606). The four guide posts (605) are welded to both ends of the damping plate (602) and both ends of the connecting plate (603). One end of the two fixing posts (604) is welded to the mounting plate (601), and the other end of the two fixing posts (604) is welded to the damping plate (602). One of the limiting rings (612) is welded to the lead screw (610), and the base plate (607) is located between the two limiting rings (612); The fixing mechanism (7) includes a second fixing column (701), two fixing frames (702) and a first connecting frame (703). The two fixing frames (702) are welded to the upper end face of the second fixing column (701), and the first connecting frame (703) is located on one side of the second fixing column (701). The second fixing column (701) is welded to the outer shell (1). The cross-section of the connecting frame 1 (703) is an inverted "U" shape. Movable columns (704) are welded to both ends of the bottom of the connecting frame 1 (703). The cross-section of the fixed frame (702) is an inverted "L" shape. The two movable columns (704) pass through the top of the two fixed frames (702) respectively. Two springs (705) are provided between the connecting frame (703) and the fixed frame (702). Two movable columns (704) pass through the two springs (705) respectively. A limit block (706) passes through the side of the movable column (704) away from the connecting frame (703). One end of the movable column (704) is welded to the inside of the limit block (706). The connecting mechanism (8) includes a fixed plate (802), a second connecting frame (807), and two retaining rings (808). The second connecting frame (807) is located on one side of the fixed plate (802), and the two retaining rings (808) are located inside the second connecting frame (807). A slot (8071) is provided on one side of the second connecting frame (807), and the cross-section of the slot (8071) is "L" shaped. A slot (8072) is provided at the top of the slot (8071), and one end of each of the two retaining rings (808) is located in the slot (8071). Inside 8071), the top of each of the two retaining rings (808) is equipped with a connecting block (809). Both connecting blocks (809) are located inside the slot two (8072). One end of the connecting frame two (807) is equipped with a motor two (810). The motor two (810) is connected to a double-acting screw (811) through a rotating shaft. The two ends of the double-acting screw (811) pass through the two connecting blocks (809) respectively. The middle of the connecting block (809) is provided with a screw hole. The two screw holes are respectively threaded to the two ends of the double-acting screw (811).

2. The fan for an oil fume purifier according to claim 1, characterized in that: A movable frame (801) is installed on the side of the fixed plate (802) away from the retaining ring (808). The movable frame (801) has a "U" shaped cross-section. A rotating wheel (803) is installed on the side of the movable frame (801) away from the fixed plate (802). One end of the rotating wheel (803) is connected to a lead screw (804). A movable block (805) is provided on the side of the lead screw (804) away from the rotating wheel (803). The end of the movable frame (801) away from the rotating wheel (803) is welded to the fixed plate (802). The movable block (805) has a "T" shaped cross-section. The top of the movable block (805) is along the movable frame. The upper surface of (801) slides, and a bearing is installed at the bottom of the movable frame (801). The end of the screw rod (804) away from the rotating wheel (803) rotates in the middle of the bearing. A screw hole is provided in the middle of one end of the movable frame (801). The screw hole is threaded with the screw rod (804). A telescopic column (806) is provided between the movable block (805) and the connecting frame (807). The two ends of the telescopic column (806) are welded to the movable block (805) and the connecting frame (807) respectively. The telescopic column (806) penetrates the bottom of the fixed plate (802) and slides inside the fixed plate (802).

3. The fan for an oil fume purifier according to claim 1, characterized in that: Lifting mechanisms (9) are provided on both sides of the outer casing (1). The lifting mechanism (9) includes a lifting frame (901), a motor (902) and a lead screw (903). The motor (902) is installed on the top of the lifting frame (901). The motor (902) is connected to the lead screw (903) through a rotating shaft. A slide rod (904) is provided on one side of the lead screw (903). The top of the lifting frame (901) is welded to one side of the outer casing (1). The cross-section of the fixing plate (802) is an inverted "L" shape. The lead screw (903) and the slide rod (904) pass through the top of the fixing plate (802). A screw hole is provided on the top of the fixing plate (802). The screw hole is threaded with the lead screw (903).

4. A fan for an oil fume purifier according to any one of claims 1-3, characterized in that: The specific steps for using this fan are as follows: Step 1: Install the mounting plate (601) and the connecting bracket (703) on the wall using expansion bolts. Place the exhaust pipe between the fume purifier and the fan. Connect the exhaust pipe to the air inlet (4) of the fan using nuts to fix the fan. Step 2: The motor 3 (902) drives the rotating shaft to rotate the lead screw 3 (903). The rotating lead screw 3 (903) engages with the screw hole on the top of the fixed plate (802). Combined with the fixed plate (802) sliding along the slide rod 2 (904), the fixed plate (802) is then moved up and down by the telescopic column (806) and the connecting frame 2 (807), so that the four retaining rings (808) in the two connecting mechanisms (8) and the connection point of the exhaust pipe and the air inlet (4) are at the same height. The rotating wheel 2 (803) drives the lead screw 2 (804) to rotate. The rotating lead screw 2 (804) engages with the screw hole in the middle of one end of the movable frame (801). The screw thread engages with the end of the screw rod (804) away from the wheel (803) and rotates to the middle of the bearing mounted on the movable frame (801). The movable frame (801), telescopic column (806) and connecting frame (807) drive the retaining ring (808) to move left and right. The motor (810) drives the rotating shaft to drive the double screw (811). The two ends of the rotating double screw (811) engage with the screw holes in the middle of the two connecting blocks (809), thereby driving the two retaining rings (808) to move closer or further away, so that the four retaining rings (808) in the two connecting mechanisms (8) clamp the connection between the exhaust pipe and the air inlet (4), thus completing the installation of the fan. Step 3: The motor (2) drives the shaft to rotate the impeller (3) inside the casing (1), causing the gas to rotate at high speed under the push of the impeller (3), so that the gas gains a lot of energy. Under the action of inertial centrifugal force, it is thrown to the outer edge of the impeller (3). After the pressure energy and kinetic energy of the gas increase, it flows out from the casing (1). A negative pressure is formed in the middle of the impeller (3). Under the action of atmospheric pressure, gas is continuously drawn in to replenish it. The high-speed rotating impeller (3) accelerates the gas, and then decelerates and changes the flow direction in the casing (1), so that the kinetic energy is converted into pressure energy. When the impeller (3) rotates, it generates centrifugal force, which throws the air out of the impeller (3), collects in the casing to increase the pressure, and discharges it from the air outlet (5). Then, the air treated in the fume purifier is drawn out by the fan and discharged into the atmosphere.

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