Energy efficient blower and method of use

Abstract

This invention relates to the field of blower technology, specifically to an energy-saving blower and its usage method, comprising a casing, a drive motor, and an impeller, wherein the drive motor is fixed to one side of the casing. This energy-saving blower and its usage method, through a tension spring, concentrates the blades inward at the center of the impeller during the start-up phase, reducing resistance during blade rotation, lowering the blower's start-up load, and avoiding excessive energy consumption during startup. Simultaneously, the blades can still perform the blowing function normally after extending outward, balancing energy saving and usage requirements, and solving the practical problems of high start-up load and high energy consumption in existing blowers. When a blade is damaged, its own centrifugal force is insufficient, causing it to move inward with the connector, while the baffle remains in an outward position, opening the opening on the back of the connector. The damaged blade is then discharged through the outlet with the assistance of airflow and collected by the annular convex shell, eliminating the need for manual disassembly and cleaning, preventing damaged blades from jamming the equipment, ensuring continuous and stable operation of the equipment, and reducing maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of blower technology, specifically to an energy-saving blower and its usage method. Background Technology

[0002] Blowers are commonly used ventilation and air-blowing equipment, widely used in industrial production, building ventilation, and residential applications. For example, the blades of most common household blowers are fixedly installed, meaning the blades are directly in working condition when started, resulting in a large starting load and high energy consumption.

[0003] Meanwhile, the blades are prone to wear, cracking and other damage during long-term operation. Damaged blades cannot be discharged automatically and can easily jam the equipment, causing the blower to malfunction.

[0004] In addition, when the blades are damaged, the impeller load becomes unbalanced, which can easily cause vibration, affecting the service life of the equipment and even causing safety hazards.

[0005] Currently, some blowers attempt to reduce energy consumption by adjusting the blade angle, but this does not solve the core problems of high starting load, failure to automatically discharge damaged blades, and load imbalance. The user experience is poor, and it fails to meet the demands of industrial production for energy-saving, stable, and easy-to-maintain blowers. Therefore, there is an urgent need for an energy-saving blower that can reduce starting load, automatically discharge damaged blades, and balance impeller load to address the shortcomings of existing technologies.

[0006] In view of this, we propose an energy-saving blower and its usage method. Summary of the Invention

[0007] The purpose of this invention is to provide an energy-saving blower and its usage method, to solve the problems mentioned in the background art, such as high starting load, inability to automatically discharge damaged blades, and impeller load imbalance in existing blowers. To achieve the above objective, this invention provides the following technical solution: an energy-saving blower, comprising a casing, a drive motor, and an impeller, wherein the drive motor is fixed to one side of the casing, and the impeller is rotatably assembled inside the casing and coaxially fixedly connected to the output shaft of the drive motor.

[0008] The impeller includes a front wheel body and a rear wheel body. The front wheel body has a ring structure. The two are parallel to each other and coaxially arranged. They rotate synchronously through the connecting structure at both ends of the blades. The impeller has several radially sliding blades evenly distributed around its circumference. The blades are slidably connected by two sliding blocks on the two sides of the wheel body. The sliding blocks extend radially along the impeller and are arranged symmetrically.

[0009] The slide block is provided with a guide rail extending radially therein, and a plug-in seat is slidably connected on the guide rail, with the blade end inserted into the plug-in seat.

[0010] The slide block is equipped with a tension spring, with both ends of the tension spring fixed to the inner end of the slide block and the plug-in seat, respectively. The tension spring is used to concentrate the blades in the center of the impeller when the blower is initially started to reduce the rotational load on the blades, and can be overcome by the centrifugal force on the blades when the impeller speed increases, so that the blades move outward to achieve normal blowing.

[0011] Preferably, the rear wheel body of the impeller has an outlet that communicates with the inside of the slide, and the outlets are evenly distributed along the circumference of the rear wheel body, with each slide corresponding to one outlet.

[0012] The rear wheel body has a central groove located between the discharge port and the plug-in seat and connected to the slide block, extending radially along the impeller. A guide rail is also provided in the central groove, and a stop is slidably mounted on the guide rail. A compression spring is mounted on the stop. The spring force is used to push the stop to close the back opening of the plug-in seat. When the impeller rotates, the stop can be compressed by centrifugal force to move the compression spring centrifugally outward along the guide rail in the central groove, and maintain the closed state of the back opening of the plug-in seat.

[0013] Preferably, the baffle and the connector are linked and cooperate. After the blade is damaged, the connector can slide inward along the guide rail in the slide block, while the baffle remains in a centrifugal outward movement state to open the back opening of the connector, so that the damaged blade can be discharged through the connector and the outlet with the help of the airflow in the housing.

[0014] Preferably, the back of the housing is provided with an annular convex shell, which communicates with the interior of the housing and is used to accommodate damaged blades ejected from the ejection port.

[0015] Preferably, the slide has an inner groove that extends radially along the impeller and is parallel to the slide. A counterweight core is slidably disposed in the inner groove, and a limiting spring is provided in the inner groove. The elastic force of the limiting spring pushes the counterweight core to move outward.

[0016] The counterweight core is connected to the connector by a cable, and a roller is rotatably installed in the inner groove to reduce the friction between the cable and the inner wall of the groove.

[0017] Preferably, the counterweight core and the connector are linked by a cable. When the blade and the connector move outward normally, the cable can pull the counterweight core to overcome the elastic force of the limiting spring and move it inward along the inner groove.

[0018] After the blades are ejected, the tension of the cable on the counterweight core is released, and the counterweight core can move outward under the action of the limit spring to balance the impeller load.

[0019] Preferably, the blade has an arc-shaped cross-section, with the concave surface facing the impeller rotation direction when the blade extends outward.

[0020] Preferably, the guide rail inside the slide is integrally formed with the slide to ensure smooth sliding of the connector and a stable structure.

[0021] A method for using an energy-saving blower includes the following steps:

[0022] S1. Start the drive motor. The drive motor drives the impeller to rotate synchronously. At this time, the tension spring is in a natural contraction state, which brings the plug-in seat and blades together at the center of the impeller, reducing the rotational load on the blades and reducing the starting energy consumption. The blower enters the starting stage.

[0023] S2. As the speed of the drive motor increases, the speed of the impeller increases synchronously, and the centrifugal force on the blades gradually increases. When the centrifugal force is greater than the tension of the tension spring, the blades drive the plug seat to move outward along the guide rail in the slide. At the same time, the baffle is compressed by the centrifugal force and moves outward along the guide rail in the middle groove, while always keeping the back opening of the plug seat closed. The blades extend to the preset position, and the blower enters the normal blowing state.

[0024] S3. During the normal outward movement of the blade and connector, the connector pulls the counterweight core through the cable, overcoming the elastic force of the limit spring and moving inward along the inner groove. The roller reduces the friction of the cable, ensuring that the counterweight core and connector move synchronously and maintain the load balance of the impeller.

[0025] S4. If the blade is damaged such as cracking or wear, the blade quality will decrease and the centrifugal force will decrease. Under the tension of the tension spring, the blade will drive the plug seat to slide inward along the guide rail.

[0026] At this time, the mass of the baffle remains unchanged and the centrifugal force remains unchanged. Maintaining the original outward movement state, the opening on the back of the connector opens. With the help of the airflow inside the casing, the damaged blades are discharged through the connector and the outlet, and are collected in the annular convex shell on the back of the casing.

[0027] S5. After the blade is ejected, the connector loses the constraint of the blade and slides further inward under the action of the tension spring. The tension of the cable on the counterweight core is released, and the counterweight core moves outward along the inner groove under the elastic force of the limit spring, balancing the load imbalance of the impeller caused by the missing blade and avoiding impeller rotation vibration.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] In this invention, the blades are drawn inward to the center of the impeller during the start-up phase by a tension spring, which reduces the resistance when the blades rotate, lowers the start-up load of the blower, and avoids excessive energy consumption during start-up. At the same time, the blower can still perform its blowing function normally after the blades are extended, thus taking into account both energy saving and usage requirements and solving the practical problems of high start-up load and high energy consumption of existing blowers.

[0030] In this invention, when a blade is damaged, its centrifugal force is insufficient, so it will move inward with the connector, while the baffle remains in an outward state, causing the opening on the back of the connector to open. The damaged blade is discharged through the ejection port with the help of airflow and collected by the annular convex shell. No manual disassembly and cleaning is required, which avoids damaging the blade and jamming the equipment, ensures the continuous and stable operation of the equipment, and reduces maintenance costs.

[0031] In this invention, through the cooperation of the counterweight core, the limiting spring and the cable, the counterweight core is pulled inward when the blade moves outward normally. After the blade is thrown out, the counterweight core automatically resets, effectively balancing the impeller load, avoiding impeller vibration due to missing blades, extending the service life of the equipment, and solving the problem of load imbalance after the existing blower blades are damaged. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0033] Figure 2 This is an exploded view of the present invention;

[0034] Figure 3 This is a schematic diagram of the structure of the rear wheel body and blades of the present invention;

[0035] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0036] Figure 5 This is an exploded view of the outlet, intermediate groove, and slide of the present invention;

[0037] Figure 6 For the present invention Figure 5 Enlarged view of point B in the middle;

[0038] Figure 7 For the present invention Figure 5 Enlarged view of point C in the middle;

[0039] Figure 8 This is a three-dimensional structural cross-sectional view of the slide and plug-in base of the present invention;

[0040] Figure 9 For the present invention Figure 8 Enlarged view of point D in the middle;

[0041] Figure 10 This is a schematic diagram of the connector, guide rail, and tension spring of the present invention;

[0042] Figure 11 For the present invention Figure 10 Enlarged view of point E in the middle.

[0043] In the diagram: 1. Housing; 2. Drive motor; 3. Impeller; 31. Front wheel body; 32. Rear wheel body; 4. Blade; 5. Slide; 6. Guide rail; 7. Plug-in socket; 8. Tension spring; 9. Outlet; 10. Intermediate groove; 11. Stop; 12. Compression spring; 13. Annular convex shell; 14. Inner groove; 15. Counterweight core; 16. Limiting spring; 17. Cable; 18. Roller. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Please see Figures 1 to 11 This invention provides a technical solution: an energy-saving blower, comprising a housing 1, a drive motor 2, and an impeller 3. The drive motor 2 is fixed to one side of the housing 1, and the impeller 3 is rotatably assembled inside the housing 1 and coaxially fixedly connected to the output shaft of the drive motor 2, ensuring that the drive motor 2 can stably provide power to the impeller 3, driving the impeller 3 to rotate synchronously and ensuring the normal operation of the blower. The impeller 3 includes a front wheel body 31 and a rear wheel body 32. The front wheel body 31 has a ring structure, and the two are parallel to each other and coaxially arranged, rotating synchronously through the connecting structure at both ends of the blades, ensuring that the front wheel body 31, the rear wheel body 32, and the blades 4 move synchronously during the rotation of the impeller 3, avoiding problems such as misalignment and jamming.

[0046] The impeller 3 has several radially sliding blades 4 evenly distributed around its circumference. The blades 4 are slidably connected to two sliding blocks 5 on both sides of the impeller 3. The sliding blocks 5 extend radially along the impeller 3 and are symmetrically arranged. The symmetrically arranged sliding blocks 5 can provide stable support for the blades 4, ensuring that the blades 4 slide smoothly and steadily in the radial direction, avoiding tilting or jamming. This lays the structural foundation for the subsequent convergence, outward movement, and damage discharge of the blades 4. The sliding blocks 5 are equipped with guide rails 6 that extend radially. The guide rails 6 are slidably connected to the insertion blocks 7. The ends of the blades 4 are inserted into the insertion blocks 7. The insertion blocks 7 serve as the connection carrier between the blades 4 and the sliding blocks 5, which not only achieves the stable fixation of the blades 4, but also drives the blades 4 to slide synchronously along the guide rails 6, ensuring the consistency and stability of the sliding of the blades 4.

[0047] A tension spring 8 is installed inside the slide 5. Both ends of the tension spring 8 are fixed to the inner end of the slide 5 and the insertion seat 7, respectively. The tension spring 8 is used to concentrate the blades 4 towards the center of the impeller 3 during the initial start-up of the blower, reducing the rotational load on the blades 4. It is also able to overcome the centrifugal force on the blades 4 as the impeller 3 speed increases, causing the blades 4 to move outward to achieve normal blowing. The core advantage of this structural design lies in solving the problem of high start-up load in existing blowers. During the start-up phase, the blades 4 are concentrated towards the center of the impeller 3, reducing the contact area between the blades 4 and the air during rotation, lowering rotational resistance, and thus reducing start-up energy consumption. After the speed increases, the blades 4 move outward with centrifugal force, achieving normal blowing function. This design balances energy saving and usage requirements, improving the energy-saving performance of the blower.

[0048] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 11 As shown, the rear wheel body 32 of the impeller 3 has an outlet 9 that communicates with the slide 5. The outlets 9 are evenly distributed around the rear wheel body 32, with one outlet 9 corresponding to each slide 5. The outlets 9 provide a channel for the discharge of damaged blades 4, ensuring that each damaged blade 4 can be discharged through the outlet 9, thus avoiding congestion when multiple blades 4 are damaged at the same time. The rear wheel body 32 has a middle groove 10, which is located between the outlet 9 and the connector 7 and communicates with the slide 5. It extends radially along the impeller 3. A guide rail 6 is also provided in the middle groove 10. A baffle 11 is slidably mounted on the guide rail 6. A compression spring 12 is mounted on the baffle 11. The spring force of the compression spring 12 is used to push the baffle 11 to close the back opening of the connector 7. When the impeller 3 rotates, the baffle 11 can be compressed by centrifugal force to move the compression spring 12 centrifugally outward along the guide rail 6 in the middle groove 10, and maintain the closed state of the back opening of the connector 7. The cooperation between the baffle 11 and the compression spring 12 can effectively prevent the blade 4 from falling off the back of the plug-in seat 7 during normal operation, ensuring the stable operation of the blower, while not affecting the normal inward and outward movement of the blade 4, achieving the dual effect of "preventing falling off during normal operation and allowing discharge when damaged".

[0049] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 11As shown, the baffle 11 and the connector 7 work together in a coordinated manner. After the blade 4 is damaged, the connector 7 can slide inward along the guide rail 6 inside the slide block 5. The baffle 11 remains in a centrifugal outward movement state to open the back opening of the connector 7, allowing the damaged blade 4 to be discharged through the connector 7 and the outlet 9 with the help of the airflow inside the casing 1. This linkage structure requires no manual intervention and relies entirely on the mass change and centrifugal force difference after the blade 4 is damaged to achieve automatic obstacle removal. This solves the problem of existing blowers where the damaged blade 4 cannot be automatically discharged and is prone to jamming, reducing equipment maintenance costs and improving operational reliability.

[0050] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 11 As shown, an annular convex shell 13 is provided on the back of the housing 1. The annular convex shell 13 is connected to the interior of the housing 1 and is used to accommodate the damaged blades 4 ejected from the ejection port 9. The annular convex shell 13 can collect the discharged damaged blades 4 in a concentrated manner, preventing the damaged blades 4 from scattering into the interior of the housing 1 or the surrounding environment, preventing blade fragments from getting stuck in the impeller 3 and affecting the normal operation of the equipment. It also facilitates subsequent manual periodic cleaning, further improving the ease of equipment maintenance.

[0051] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 11 As shown, the slide 5 has an inner groove 14 that extends radially along the impeller 3 and is parallel to the slide 5. A counterweight core 15 is slidably disposed in the inner groove 14, and a limiting spring 16 is provided inside the inner groove 14. The elastic force of the limiting spring 16 pushes the counterweight core 15 to move outward. The counterweight core 15 is connected to the plug seat 7 by a cable 17. A roller 18 is rotatably disposed in the inner groove 14 to reduce the friction between the cable 17 and the inner wall of the inner groove 14. The roller 18 reduces the wear of the cable 17 during sliding, extends the service life of the cable 17, ensures the linkage stability between the counterweight core 15 and the plug seat 7, and prevents the load balancing function from failing due to wear and breakage of the cable 17.

[0052] The counterweight core 15 and the connector 7 are linked by a cable 17. When the blade 4 and the connector 7 move outward normally, the cable 17 pulls the counterweight core 15 to overcome the elastic force of the limiting spring 16 and move it inward along the inner groove 14. After the blade 4 is thrown out, the tension of the cable 17 on the counterweight core 15 is released, and the counterweight core 15 can move outward under the action of the limiting spring 16 to balance the load of the impeller 3. This structure can effectively solve the problem of load imbalance of the impeller 3 after the blade 4 is damaged and discharged. Through the automatic reset of the counterweight core 15, the weight distribution on both sides of the impeller 3 is balanced, avoiding vibration when the impeller 3 rotates, extending the service life of the equipment, and improving the operating stability of the blower.

[0053] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 11 As shown, the cross-section of the blade 4 is an arc-shaped structure. When the blade 4 extends outward, the arc-shaped concave surface faces the rotation direction of the impeller 3. This structure can improve the contact efficiency between the blade 4 and the air, enhance the blowing effect, and further reduce the operating energy consumption. Combined with the energy-saving effect of the tension spring 8, it can improve the overall energy-saving performance.

[0054] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 11 As shown, the guide rail 6 inside the slide 5 is integrally formed with the slide 5 to ensure that the plug-in seat 7 slides smoothly and has a stable structure. The integral design reduces the gap between the components, avoids loosening between the guide rail 6 and the slide 5, and ensures that the plug-in seat 7 slides smoothly without jamming, further improving the operational stability and structural reliability of the equipment.

[0055] An energy-saving blower and its usage method include the following steps:

[0056] S1. Start the drive motor 2. The drive motor 2 drives the impeller 3 to rotate synchronously. At this time, the tension spring 8 is in a naturally contracted state, which brings the plug-in seat 7 and the blade 4 together in the center of the impeller 3, reducing the rotational load of the blade 4 and reducing the starting energy consumption. The blower enters the starting stage.

[0057] S2. As the speed of the drive motor 2 increases, the speed of the impeller 3 increases synchronously, and the centrifugal force on the blade 4 gradually increases. When the centrifugal force is greater than the tension of the tension spring 8, the blade 4 drives the plug seat 7 to move outward along the guide rail 6 in the slide seat 5. At the same time, the baffle 11 is compressed by the centrifugal force and moves outward along the guide rail 6 in the middle groove 10, while always keeping the back opening of the plug seat 7 closed. The blade 4 extends to the preset position, and the blower enters the normal blowing state.

[0058] During the normal outward movement of S3, blade 4 and connector 7, connector 7 pulls counterweight core 15 through cable 17, overcoming the elastic force of limit spring 16 and moving inward along inner groove 14. Roller 18 reduces friction of cable 17, ensuring that counterweight core 15 and connector 7 are linked synchronously, maintaining the load balance of impeller 3.

[0059] S4. If the blade 4 is damaged by cracking, wear, or other reasons, the mass of the blade 4 decreases and the centrifugal force it experiences decreases. Under the tension of the tension spring 8, the blade 4 drives the plug seat 7 to slide inward along the guide rail 6. At this time, the mass and centrifugal force of the baffle 11 remain unchanged, maintaining its original outward movement. The opening on the back of the plug seat 7 opens, and the damaged blade 4 is discharged through the plug seat 7 and the outlet 9 with the help of the airflow inside the housing 1, and is collected in the annular convex shell 13 on the back of the housing 1.

[0060] S5. After the blade 4 is thrown out, the plug seat 7 loses the constraint of the blade 4 and slides further inward under the action of the tension spring 8. The tension of the cable 17 on the counterweight core 15 is released. Under the elastic force of the limit spring 16, the counterweight core 15 moves outward along the inner groove 14 to balance the load imbalance of the impeller 3 caused by the absence of the blade 4 and avoid the impeller 3 from rotating and vibrating.

[0061] 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 preferred examples and are not intended to limit 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 the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving blower, comprising a housing (1), a drive motor (2), and an impeller (3), wherein the drive motor (2) is fixed on one side of the housing (1), and the impeller (3) is rotatably assembled inside the housing (1) and coaxially fixedly connected to the output shaft of the drive motor (2); The impeller (3) includes a front impeller body (31) and a rear impeller body (32). The front impeller body (31) is a ring structure. The two impellers are parallel to each other and coaxially arranged, and rotate synchronously through the connecting structure at both ends of the blades. Its characteristic is that: The impeller (3) has a number of radially sliding blades (4) evenly distributed around its circumference. The blades (4) are slidably connected by two sliding blocks (5) on the two sides of the impeller (3). The sliding blocks (5) extend radially along the impeller (3) and are arranged symmetrically. The slide (5) is provided with a guide rail (6) extending radially therein, and a plug-in seat (7) is slidably connected on the guide rail (6), and the end of the blade (4) is inserted into the plug-in seat (7); The slide (5) is provided with a tension spring (8). The two ends of the tension spring (8) are fixed to the inner end of the slide (5) and the plug seat (7) respectively. The tension spring (8) is used to concentrate the blades (4) in the center of the impeller (3) when the blower is initially started to reduce the rotational load of the blades (4). It can also be overcome by the centrifugal force on the blades (4) when the speed of the impeller (3) increases, so that the blades (4) move outward to achieve normal blowing.

2. The energy-saving blower according to claim 1, characterized in that: The impeller (3) has an outlet (9) on its rear wheel body (32) that communicates with the slide (5). The outlets (9) are evenly distributed around the rear wheel body (32), and each slide (5) corresponds to one outlet (9). The rear wheel body (32) is provided with a middle groove (10). The middle groove (10) is located between the outlet (9) and the plug seat (7) and is connected to the slide (5). It extends radially along the impeller (3). A guide rail (6) is also provided in the middle groove (10). A baffle (11) is slidably provided on the guide rail (6). A compression spring (12) is provided on the baffle (11). The elastic force of the compression spring (12) is used to push the baffle (11) to close the back opening of the plug seat (7). When the impeller (3) rotates, the baffle (11) can be compressed by centrifugal force to move the compression spring (12) centrifugally outward along the guide rail (6) in the middle groove (10) and maintain the closed state of the back opening of the plug seat (7).

3. The energy-saving blower according to claim 2, characterized in that: The baffle (11) and the plug-in seat (7) work together. After the blade (4) is damaged, the plug-in seat (7) can slide inward along the guide rail (6) in the slide seat (5). The baffle (11) remains in a centrifugal outward state to open the back opening of the plug-in seat (7), so that the damaged blade (4) can be discharged through the plug-in seat (7) and the outlet (9) with the help of the airflow in the housing (1).

4. An energy-saving blower according to claim 3, characterized in that: The back of the housing (1) is provided with an annular convex shell (13), which is connected to the interior of the housing (1) and is used to accommodate the damaged blades (4) thrown out from the ejection port (9).

5. An energy-saving blower according to claim 1, characterized in that: The slide (5) has an inner groove (14) inside. The inner groove (14) extends radially along the impeller (3) and is parallel to the slide (5). A counterweight core (15) is slidably arranged in the inner groove (14). A limiting spring (16) is provided in the inner groove (14). The elastic force of the limiting spring (16) pushes the counterweight core (15) to move outward. The counterweight core (15) is connected to the plug seat (7) by a cable (17). A roller (18) is rotatably arranged in the inner groove (14). The roller (18) is used to reduce the friction between the cable (17) and the inner wall of the inner groove (14).

6. An energy-saving blower according to claim 5, characterized in that: The counterweight core (15) and the plug-in seat (7) are linked by a cable (17). When the blade (4) and the plug-in seat (7) move outward normally, the counterweight core (15) can be pulled by the cable (17) to overcome the elastic force of the limiting spring (16) and move inward along the inner groove (14). After the blade (4) is thrown out, the tension of the cable (17) on the counterweight core (15) is released, and the counterweight core (15) can move outward under the elastic force of the limiting spring (16) to balance the load of the impeller (3).

7. An energy-saving blower according to claim 1, characterized in that: The blade (4) has an arc-shaped cross-section, and when the blade (4) extends outward, the arc-shaped concave surface faces the rotation direction of the impeller (3).

8. An energy-saving blower according to claim 1, characterized in that: The guide rail (6) inside the slide (5) is integrally formed with the slide (5) to ensure that the plug-in seat (7) slides smoothly and has a stable structure.

9. A method of using an energy-saving blower, comprising using an energy-saving blower as described in any one of claims 1-8, characterized in that, Includes the following steps: S1. Start the drive motor (2). The drive motor (2) drives the impeller (3) to rotate synchronously. At this time, the tension spring (8) is in a natural contraction state, which brings the plug-in seat (7) and the blade (4) together in the center of the impeller (3), reduces the rotational load of the blade (4), reduces the starting energy consumption, and the blower enters the starting stage. S2. As the speed of the drive motor (2) increases, the speed of the impeller (3) increases synchronously, and the centrifugal force on the blade (4) gradually increases. When the centrifugal force is greater than the tension of the tension spring (8), the blade (4) drives the plug seat (7) to move outward along the guide rail (6) in the slide (5). At the same time, the baffle (11) is compressed by the centrifugal force and moves outward along the guide rail (6) in the middle groove (10) centrifugally, while always keeping the back opening of the plug seat (7) closed. The blade (4) extends to the preset position, and the blower enters the normal blowing state. During the normal outward movement of S3, blade (4) and connector (7), connector (7) pulls counterweight core (15) through cable (17), overcomes the elastic force of limit spring (16) and moves inward along inner groove (14). Roller (18) reduces friction of cable (17) to ensure that counterweight core (15) and connector (7) are linked synchronously and maintain the load balance of impeller (3). S4. If the blade (4) is damaged such as cracking or wear, the quality of the blade (4) will decrease and the centrifugal force will decrease. Under the tension of the tension spring (8), the blade (4) will drive the plug-in seat (7) to slide inward along the guide rail (6). At this time, the mass of the baffle (11) remains unchanged and the centrifugal force remains unchanged. It maintains its original outward movement state. The back opening of the plug-in seat (7) is opened. The damaged blade (4) is discharged through the plug-in seat (7) and the outlet (9) under the assistance of the airflow inside the casing (1). It is then collected in the annular convex shell (13) on the back of the casing (1). S5. After the blade (4) is thrown out, the plug-in seat (7) loses the constraint of the blade (4) and slides further inward under the action of the tension spring (8). The tension of the cable (17) on the counterweight core (15) is released. Under the elastic force of the limit spring (16), the counterweight core (15) moves outward along the inner groove (14) to balance the load imbalance of the impeller (3) caused by the absence of the blade (4) and avoid the impeller (3) from rotating and vibrating.

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