A horizontal inner rotor fan

Abstract

The present invention provides a horizontal inner rotor ventilator, which relates to the technical field of ventilators, and includes a base plate, a volute, a motor and an impeller. A mounting seat is arranged around the base plate, the volute is mounted on the mounting seat, an air inlet is arranged at the upper end of the volute, an air outlet is arranged at the front end of the volute, a motor is arranged in the volute, the motor is mounted on the base plate, an impeller is arranged above the motor, an impeller cover is arranged outside the motor, and an output shaft of the motor is connected to the impeller. In the present invention, the volute is horizontally installed as a flow field cavity, so that the ventilator is arranged horizontally as a whole, and the height of the ventilator as a whole is reduced. The motor is arranged inside the volute, and the protection performance of the motor is improved. The motor body is located in the cavity formed by the impeller, and the space is reasonably used, and the volume of the ventilator is further reduced, thereby reducing the installation space occupied by the ventilator, improving the space utilization rate, and facilitating the installation of the ventilator.

Description

Technical Field

[0001] The invention relates to the technical field of fans, and in particular to a horizontal inner rotor fan. Background Art

[0002] The fans of rail transit vehicles can be used in a variety of equipment, such as air conditioning and ventilation systems, power cooling systems, etc. For air conditioning and ventilation systems, fans usually have two uses. One is to deliver air with a suitable amount of air into the car, and the other is to be installed in the outdoor unit of the air conditioning unit to discharge waste heat. The fans for the first purpose are mostly centrifugal fans, which require a large static pressure, and the second is usually axial flow fans, which have the characteristics of large air volume and low static pressure. At the same time, with the development of railway construction and urban rail transit construction, the requirements for the stability and reliability of fans used in air conditioning systems are also constantly increasing.

[0003] The indoor fans of rail vehicle air conditioners basically use centrifugal fans. There are generally two types of existing centrifugal fans: the first type is an inner rotor vertical centrifugal fan, the motor can be divided into single-axis extension and double-axis extension, and the volute is installed vertically. While ensuring sufficient overall performance, the overall height of the fan is ≥280mm, and the fan protection level can reach IP56; the second type is an outer rotor centrifugal fan, the motor can be divided into single-axis extension and double-axis extension. The height of this type of fan is generally <280mm, and it is generally used for air-conditioning units with smaller height space, with a protection level of IP54.

[0004] For example, the application with authorization announcement number CN220337106U discloses a high-efficiency centrifugal fan for air conditioning, including a volute main body, a motor is installed on the base surface of the volute main body, the output end of the motor is connected to an impeller through a coupling, an air outlet is provided at the left end of the volute main body, a fixing plate is fixedly installed at the left end of the air outlet, ventilation holes are equidistantly opened at the left end of the fixing plate, reinforcing ribs are equidistantly installed on the side of the base surface of the volute main body close to the motor, a support frame is installed at the bottom end of the motor, and a mounting plate is fixedly installed at the bottom end of the support frame. In the utility model, by arranging the air outlet, the fixing plate, ventilation holes, reinforcing ribs and through holes, energy consumption is reduced and air supply performance is increased, which has promotion value.

[0005] The air-conditioning system for rail transit vehicles generally has a smaller space available, and the space allocated to the ventilator is even smaller. In addition, the air conditioner is in direct contact with the outside world, and the protection required of electrical products is higher. The overall height of the centrifugal fan is affected by the diameter of the volute, and the height is relatively high. In addition, the motor is arranged outside the volute, which is larger in size and occupies more space, making it inconvenient to install the fan. Summary of the invention

[0006] The present invention provides a horizontal inner rotor fan to solve the technical problems that the overall height of the current centrifugal fan is affected by the diameter of the volute, the height is relatively high, and the motor is arranged outside the volute, the volume is large, and more space is occupied, which is inconvenient to install the fan.

[0007] In order to solve the above technical problems, the present invention discloses a horizontal inner rotor fan, comprising: a base plate, a volute, a motor and an impeller, wherein mounting seats are arranged around the base plate, the volute is installed on the mounting seats, an air inlet is arranged at the upper end of the volute, an air outlet is arranged at the front end of the volute, a motor is arranged in the volute, the motor is installed on the base plate, an impeller is arranged above the motor, an impeller cover is arranged outside the motor, and an output shaft of the motor is connected to the impeller.

[0008] Preferably, a guide ring is provided at the air inlet, and the outer periphery of the guide ring is connected to the upper end of the volute.

[0009] Preferably, the impeller includes a front disk, a middle disk, a rear disk, blades and a sleeve, the middle disk is located between the front disk and the rear disk, and a plurality of blades are arranged between the front disk, the middle disk and the rear disk. The middle disk includes a mounting plate, a connecting ring and a connecting ring which are arranged in sequence from top to bottom. The mounting plate is arranged horizontally, and a through hole is arranged in the center of the mounting plate. The upper end of the connecting ring is connected to the outer periphery of the mounting plate and a first fillet is arranged at the connection, the lower end of the connecting ring is connected to the inner ring of the connecting ring and a second fillet is arranged at the connection, the connecting ring is connected to the rear disk, the sleeve is installed on the mounting plate, the sleeve is connected to the output shaft of the motor, and a shaft head nut is arranged at the upper end of the output shaft.

[0010] Preferably, the center plate is an integral stamping structure.

[0011] Preferably, the central axes of the front disc, the middle disc, the rear disc and the shaft sleeve are on the same axis.

[0012] Preferably, a protective cover is provided at the upper end of the volute, the bottom of the protective cover is connected to the upper end of the volute, a plurality of ventilation slots are provided on the side wall of the protective cover, the plurality of ventilation slots are distributed in a circular array, the lower ends of the ventilation slots pass through the bottom of the protective cover, the diameter of the protective cover is larger than the diameter of the air inlet, and the center line of the protective cover is on the same vertical line as the center of the air inlet.

[0013] Preferably, a dustproof net is horizontally arranged inside the protective cover, and the outer periphery of the dustproof net is connected to the inner wall of the protective cover.

[0014] Preferably, a connecting sleeve is sleeved on the outside of the output shaft, the connecting sleeve is located above the impeller, a connecting hole is set on the side wall of the connecting sleeve, an electric push rod is set on the outside of the connecting sleeve, the telescopic end of the electric push rod is inserted into the connecting hole, a fixed sleeve is sleeved on the outside of the connecting sleeve, the inner wall of the fixed sleeve is rotatably connected to the outer wall of the connecting sleeve, a plurality of support rods are set on the outer wall of the fixed sleeve, one end of the support rod is connected to the outer wall of the fixed sleeve, and the other end of the support rod is connected to the inner wall of the protective cover.

[0015] Preferably, a plurality of dust removal plates are arranged at the bottom of the connecting sleeve, one end of the dust removal plate is connected to the outer wall of the connecting sleeve, the other end of the dust removal plate contacts the inner wall of the protective cover, and the bottom wall of the dust removal plate contacts the upper surface of the dustproof net.

[0016] Preferably, a fixed block is provided at the bottom of the support rod, a sliding hole is horizontally provided in the fixed block, a knocking rod is slidably provided in the sliding hole, the knocking rod passes through the sliding hole near one end of the output shaft and a sliding block is provided, the sliding block is slidably connected to the support rod, a connecting spring is sleeved on the outside of the knocking rod, one end of the connecting spring is connected to the fixed block, and the other end of the connecting spring is connected to the sliding block, a first magnetic block is provided near one end of the sliding block near the output shaft, a second magnetic block is provided on the dust removal plate, the second magnetic block is located between the first magnetic block and the output shaft, and the magnetic pole of the second magnetic block away from one end of the output shaft is opposite to that of the first magnetic block near one end of the output shaft.

[0017] The technical solution of the present invention has the following advantages: The present invention provides a horizontal inner rotor ventilator, which relates to the technical field of ventilators, including a base plate, a volute, a motor and an impeller, a mounting seat is arranged around the base plate, the volute is installed on the mounting seat, an air inlet is arranged at the upper end of the volute, an air outlet is arranged at the front end of the volute, a motor is arranged in the volute, the motor is installed on the base plate, an impeller is arranged above the motor, an impeller cover is arranged outside the motor, and the output shaft of the motor is connected to the impeller. In the present invention, the volute is installed horizontally as a flow field cavity, so that the ventilator is arranged horizontally as a whole, reducing the height of the ventilator as a whole, the motor is arranged inside the volute, improving the protection performance of the motor, and the motor body is located in the cavity formed by the impeller, rationally utilizing the space, further reducing the volume of the ventilator, thereby reducing the installation space occupied by the ventilator, improving the space utilization rate, and facilitating the installation of the ventilator.

[0018] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the devices particularly pointed out in the written description and the drawings of the description.

[0019] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a schematic diagram of the structure of an existing centrifugal fan;

[0022] Figure 2 This is a schematic diagram of the overall structure of a horizontal inner rotor fan of the present invention;

[0023] Figure 3 A top view of a horizontal inner rotor ventilator according to the present invention;

[0024] Figure 4 It is a schematic diagram of the impeller structure in the present invention;

[0025] Figure 5 It is a top view of the impeller in the present invention;

[0026] Figure 6 This is a schematic diagram of the installation of the protective cover in the present invention;

[0027] Figure 7 It is a schematic diagram of the internal structure of the protective cover in the present invention;

[0028] Figure 8 For the present invention Figure 7 A magnified view of the structure at center;

[0029] Fig. 9 For the present invention Figure 7 Enlarged view of the structure at point B in the middle.

[0030] In the figure: 1. base plate; 2. volute; 3. motor; 4. impeller; 5. mounting seat; 6. output shaft; 7. guide ring; 8. front plate; 9. middle plate; 91. mounting plate; 92. connecting ring; 93. connecting ring; 10. rear plate; 11. blades; 12. bushing; 13. protective cover; 14. ventilation slot; 15. dust net; 16. connecting sleeve; 17. electric push rod; 18. fixed sleeve; 19. support rod; 20. dust removal plate; 21. fixed block; 22. knocking rod; 23. sliding block; 24. connecting spring; 25. first magnetic block; 26. second magnetic block. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0032] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] Example 1

[0034] The embodiment of the present invention provides a horizontal inner rotor fan, such as Figure 1-Figure 9 As shown, it includes: a base plate 1, a volute 2, a motor 3 and an impeller 4. Mounting seats 5 are arranged around the base plate 1, the volute 2 is installed on the mounting seats 5, an air inlet is arranged at the upper end of the volute 2, an air outlet is arranged at the front end of the volute 2, a motor 3 is arranged in the volute 2, the motor 3 is installed on the base plate 1, an impeller 4 is arranged above the motor 3, the impeller 4 cover is arranged outside the motor 3, and the output shaft 6 of the motor 3 is connected to the impeller 4.

[0035] The working principle and beneficial effects of the above technical solution are as follows: Figure 1 As shown in FIG. 1 , it is a schematic diagram of the structure of an existing centrifugal fan. The height of the centrifugal fan is affected by the height of the volute 2, and the overall height is relatively high. In the present application, Figure 2 As shown, the volute 2 is horizontally mounted on the mounting base 5 as a flow field cavity, and the mounting base 5 is fixedly mounted around the base plate 1, so that the fan is arranged horizontally as a whole, and the motor 3 is arranged inside the volute 2, which improves the protection performance of the motor 3, enhances the reliability of the fan, and prolongs the service life of the fan. The height of the fan is affected by the height of the motor 3, which reduces the overall height of the fan. An output shaft 6 is arranged on the upper end of the motor 3, and the output shaft 6 is connected to the impeller 4. The rotation of the motor 3 can drive the impeller 4 to rotate inside the volute 2, so that external air enters the volute 2 through the air inlet and flows out from the air outlet, forming a continuous gas flow, realizing the ventilation function, and a cavity is formed inside the impeller 4, and the body of the motor 3 is located in the cavity formed by the impeller 4, which reasonably utilizes the space and further reduces the volume of the fan, thereby reducing the occupation of the installation space of the fan, improving the space utilization rate, and facilitating the installation of the fan.

[0036] Example 2

[0037] On the basis of the above-mentioned embodiment 1, Figure 3 As shown, a guide ring 7 is provided at the air inlet, and the outer periphery of the guide ring 7 is connected to the upper end of the volute 2.

[0038] The working principle and beneficial effects of the above technical solution are as follows: a guide ring 7 is provided at the air inlet, and the guide ring 7 is connected to the upper end of the volute 2 by a plurality of bolt assemblies. The guide ring 7 guides the airflow entering the volute 2, so that the air intake of the ventilator is more uniform, thereby improving the air flow efficiency and effect.

[0039] Example 3

[0040] On the basis of Example 1 or 2, Figure 4 , Figure 5As shown, the impeller 4 includes a front plate 8, a middle plate 9, a rear plate 10, blades 11 and a sleeve 12. The middle plate 9 is located between the front plate 8 and the rear plate 10. A plurality of blades 11 are arranged between the front plate 8, the middle plate 9 and the rear plate 10. The middle plate 9 includes a mounting plate 91, a connecting ring 92 and a connecting ring 93 which are arranged in sequence from top to bottom. The mounting plate 91 is arranged horizontally, a through hole is arranged at the center of the mounting plate 91, the upper end of the connecting ring 92 is connected to the outer periphery of the mounting plate 91 and a first fillet is arranged at the connection, the lower end of the connecting ring 92 is connected to the inner ring of the connecting ring 93 and a second fillet is arranged at the connection, the connecting ring 93 is connected to the rear plate 10, the sleeve 12 is installed on the mounting plate 91, the sleeve 12 is connected to the output shaft 6 of the motor 3, and a shaft head nut is arranged at the upper end of the output shaft 6;

[0041] The middle plate 9 is an integrated stamping structure;

[0042] The central axes of the front disc 8, the middle disc 9, the rear disc 10 and the shaft sleeve 12 are on the same axis.

[0043] The working principle and beneficial effects of the above technical solution are as follows: the impeller 4 includes a front disc 8, a middle disc 9 and a rear disc 10 arranged in sequence from top to bottom, the middle disc 9 includes a mounting plate 91, a connecting ring 92 and a connecting ring 93, and the central part of the middle disc 9 is protruded toward the front disc 8 through the connection of the mounting plate 91 and the connecting ring 92, thereby forming a cavity, and the body of the motor 3 can be installed in the cavity to improve the utilization rate of the internal space of the volute 2, and the shaft sleeve 12 is installed on the mounting plate 91, and the shaft sleeve 12 is connected to the mounting plate 91 by a bolt assembly, which is convenient for the disassembly and assembly of the shaft sleeve 12, and the output shaft 6 of the motor 3 is connected to the shaft sleeve 12 for driving the impeller 4, and a shaft head nut is provided at the upper end of the output shaft 6, and the shaft sleeve 12 is tightened by the shaft head nut, which improves the reliability of the connection between the output shaft 6 and the shaft sleeve 12 and avoids rotation. Looseness occurs during the process, the connecting ring 93 is connected to the rear disk 10 by a bolt assembly, which is convenient for the overall disassembly and assembly of the middle disk 9. The middle disk 9 is stamped in one piece, and the molding height is adjusted according to the height of the motor 3, so that the cavity formed by the mounting plate 91 and the connecting ring 92 adapts to the motor 3 body, thereby adapting to the fan height required by the customer. The blades 11 are distributed in an annular array, and the blades 11 are riveted between the front disk 8, the middle disk 9, and the rear disk 10. The number and angle of the blades 11 are set according to the performance requirements of the fan. A fixed disk is set on the side of the rear disk 10 away from the middle disk 9, and the fixed disk is provided with riveting holes corresponding to the blades 11 along the circumferential direction. The end of the blade 11 can be riveted to the fixed disk. By setting the fixed disk, the reliability of the connection of the blade 11 is further improved, and the service life of the impeller 4 is extended.

[0044] Example 4

[0045] On the basis of any one of Examples 1-3, Figure 6 , Figure 7As shown, a protective cover 13 is arranged at the upper end of the volute 2, the bottom of the protective cover 13 is connected to the upper end of the volute 2, a plurality of ventilation slots 14 are arranged on the side wall of the protective cover 13, the plurality of ventilation slots 14 are distributed in a circular array, the lower ends of the ventilation slots 14 pass through the bottom of the protective cover 13, the diameter of the protective cover 13 is larger than the diameter of the air inlet, and the center line of the protective cover 13 and the center of the air inlet are on the same vertical line.

[0046] The working principle and beneficial effects of the above technical solution are as follows: the protective cover 13 is arranged at the upper end of the volute 2, and a plurality of ventilation grooves 14 are arranged along the circumferential direction of the protective cover 13, and the upper and lower ends of the protective cover 13 are open, which will not affect the inflow of air at the air inlet of the volute 2. The protective cover 13 can protect the upper end of the output shaft 6 of the motor 3 to prevent people from entering and accidentally touching the output shaft 6, thereby improving safety. The height of the protective cover 13 is lower than the height of the output shaft 6, so as not to increase the overall height of the fan, and facilitate the installation of the fan.

[0047] Example 5

[0048] On the basis of Example 4, Figure 7 As shown, a dustproof net 15 is horizontally arranged inside the protective cover 13 , and the outer periphery of the dustproof net 15 is connected to the inner wall of the protective cover 13 .

[0049] The working principle and beneficial effects of the above technical solution are as follows: a dustproof net 15 is arranged in the protective cover 13, the outer periphery of the dustproof net 15 is fixedly connected to the inner wall of the protective cover 13, a mounting hole is arranged in the center of the dustproof net 15, and the diameter of the mounting hole is larger than the diameter of the output shaft 6, so that the dustproof net 15 is installed on the outside of the output shaft 6 through the mounting hole, and the external air flows to the air inlet through the dustproof net 15. The dustproof net 15 is used to intercept dust, impurities, etc. in the air flowing into the volute 2, reduce the dust entering the volute 2, ensure ventilation while reducing the entry of dust, improve the dustproof effect of the motor 3, and the protection level of the motor 3 can reach IP56, thereby improving the reliability of the use of the fan and extending the service life of the fan.

[0050] Example 6

[0051] On the basis of Example 5, Figure 7 , Figure 8 As shown, a connecting sleeve 16 is sleeved on the outside of the output shaft 6, the connecting sleeve 16 is located above the impeller 4, a connecting hole is set on the side wall of the connecting sleeve 16, an electric push rod 17 is set on the outside of the connecting sleeve 16, the telescopic end of the electric push rod 17 is inserted into the connecting hole, a fixing sleeve 18 is sleeved on the outside of the connecting sleeve 16, the inner wall of the fixing sleeve 18 is rotatably connected to the outer wall of the connecting sleeve 16, a plurality of support rods 19 are set on the outer wall of the fixing sleeve 18, one end of the support rod 19 is connected to the outer wall of the fixing sleeve 18, and the other end of the support rod 19 is connected to the inner wall of the protective cover 13.

[0052] The working principle and beneficial effects of the above technical solution are as follows: a connecting sleeve 16 is further provided outside the output shaft 6, an electric push rod 17 is provided outside the connecting sleeve 16, a controller is provided outside the volute 2, a wind speed sensor is provided at the air outlet of the volute 2, the controller is electrically connected to the electric push rod 17 and the wind speed sensor respectively, the wind speed sensor is used to detect the wind speed at the air outlet, when the wind speed at the air outlet is less than the preset wind speed, it indicates that the dustproof net 15 is seriously blocked, at this time, the controller controls the electric push rod 17 to push out a preset length, so that the telescopic end of the electric push rod 17 contacts the outer wall of the output shaft 6, at this time, the connecting sleeve 16 can rotate synchronously with the output shaft 6, the telescopic end of the electric push rod 17 can also be provided with an anti-sliding block, the anti-sliding block It is made of anti-slip and wear-resistant material. By setting an anti-sliding block, the connection between the telescopic end and the output shaft 6 can be made more reliable and slipping can be reduced. When the wind speed at the air outlet detected by the wind speed sensor reaches the preset wind speed, the controller controls the telescopic end of the electric push rod 17 to retract, thereby disconnecting the connection between the connecting sleeve 16 and the output shaft 6, reducing the power consumption of the motor 3. A fixed sleeve 18 is set for rotation outside the connecting sleeve 16, and a plurality of support rods 19 are set between the fixed sleeve 18 and the protective cover 13. The support rods 19 are distributed in a circular array about the center of the fixed sleeve 18. By setting the support rods 19, the structural stability of the protective cover 13 can be improved, deformation of the protective cover 13 can be avoided, the service life of the protective cover 13 can be extended, and the protective effect can be enhanced.

[0053] Example 7

[0054] On the basis of Example 6, Figure 7 , Figure 8 As shown, a plurality of dust removal plates 20 are arranged at the bottom of the connecting sleeve 16 , one end of the dust removal plate 20 is connected to the outer wall of the connecting sleeve 16 , the other end of the dust removal plate 20 contacts the inner wall of the protective cover 13 , and the bottom wall of the dust removal plate 20 contacts the upper surface of the dustproof net 15 .

[0055] The working principle and beneficial effects of the above technical solution are as follows: when the output shaft 6 rotates, it can drive the connecting sleeve 16 to rotate inside the fixed sleeve 18, and the connecting sleeve 16 rotates to drive the dust removal plate 20 to rotate. When the dust removal plate 20 rotates, the bottom wall of the dust removal plate 20 contacts the upper surface of the dustproof net 15, and the dust removal plate 20 can scrape the dust on the surface of the dustproof net 15, and in the process of rotation, part of the dust is thrown out to the outside of the protective cover 13 through the ventilation slots 14 of the protective cover 13 by centrifugal action. At the same time, the dust removal plate 20 away from the end of the connecting sleeve 16 can The dust removal plate 20 can contact the inner wall of the protective cover 13, and the dust removal plate 20 can scrape off the dust accumulated on the inner wall of the protective cover 13 during the rotation, so that the dust is discharged from the ventilation slot 14, thereby improving the cleanliness of the dustproof net 15, ensuring the dustproof effect of the dustproof net 15, avoiding the clogging of the dustproof net 15 and affecting the air flow into the volute 2, thereby ensuring the stability and safety of the fan operation, and the automatic cleaning of the surface of the dustproof net 15 can be achieved through the rotation of the dust removal plate 20, thereby reducing the labor intensity of the staff and extending the service life of the fan.

[0056] Example 8

[0057] On the basis of Example 7, Figure 7-Figure 9 As shown, a fixed block 21 is set at the bottom of the support rod 19, a sliding hole is horizontally set in the fixed block 21, a knocking rod 22 is slidably set in the sliding hole, the knocking rod 22 passes through the sliding hole near the output shaft 6 and is provided with a sliding block 23, the sliding block 23 is slidably connected to the support rod 19, a connecting spring 24 is sleeved on the outside of the knocking rod 22, one end of the connecting spring 24 is connected to the fixed block 21, and the other end of the connecting spring 24 is connected to the sliding block 23, a first magnetic block 25 is set at the end of the sliding block 23 near the output shaft 6, a second magnetic block 26 is set on the dust removal plate 20, the second magnetic block 26 is located between the first magnetic block 25 and the output shaft 6, and the second magnetic block 26 is away from the output shaft 6. The end has an opposite magnetic pole to the end of the first magnetic block 25 near the output shaft 6.

[0058] The working principle and beneficial effects of the above technical solution are as follows: when the dust removal plate 20 rotates, it can drive the second magnetic block 26 to rotate synchronously. During the rotation process, when the second magnetic block 26 gradually approaches the first magnetic block 25, under the action of the magnetic force, the first magnetic block 25 drives the sliding block 23 to slide in the direction close to the output shaft 6, and the connecting spring 24 is stretched. As the second magnetic block 26 gradually moves away from the first magnetic block 25, under the action of the connecting spring 24, the sliding block 23 slides in the direction away from the output shaft 6, and the sliding block 23 drives the knocking rod 22 to slide in the fixed block 21, and the knocking rod 22 slides in the direction close to the protective cover 13 until the knocking The rod 22 is in contact with the inner wall of the protective cover 13. As the dust removal plate 20 continues to rotate, the sliding block 23 slides back and forth at the bottom of the support rod 19, so that the knocking rod 22 continuously knocks on the protective cover 13. The knocking rod 22 knocks on the protective cover 13 to generate vibration, which can drive the dustproof net 15 to vibrate, which can not only discharge the dust at the ventilation slot 14 to the outside of the protective cover 13, but also shake off the dust adhered to the inside of the dustproof net 15 to prevent the dustproof net 15 from being blocked, further ensuring the dustproof and ventilation effects of the dustproof net 15. A small amount of dust entering the volute 2 will not have a significant impact on the motor 3, thereby ensuring the normal operation of the fan.

[0059] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0060] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A horizontal inner rotor fan, characterized in that: include: A base plate (1), a volute (2), a motor (3) and an impeller (4); a mounting seat (5) is arranged around the base plate (1); the volute (2) is mounted on the mounting seat (5); an air inlet is arranged at the upper end of the volute (2); an air outlet is arranged at the front end of the volute (2); a motor (3) is arranged in the volute (2); the motor (3) is mounted on the base plate (1); an impeller (4) is arranged above the motor (3); a cover of the impeller (4) is arranged outside the motor (3); and an output shaft (6) of the motor (3) is connected to the impeller (4); A protective cover (13) is arranged at the upper end of the volute (2), the bottom of the protective cover (13) is connected to the upper end of the volute (2), a plurality of ventilation slots (14) are arranged on the side wall of the protective cover (13), the plurality of ventilation slots (14) are distributed in a circular array, the lower ends of the ventilation slots (14) penetrate the bottom of the protective cover (13), the diameter of the protective cover (13) is greater than the diameter of the air inlet, and the center line of the protective cover (13) and the center of the air inlet are on the same vertical line; A dustproof net (15) is horizontally arranged inside the protective cover (13), and the outer periphery of the dustproof net (15) is connected to the inner wall of the protective cover (13); A connecting sleeve (16) is sleeved on the outside of the output shaft (6), the connecting sleeve (16) is located above the impeller (4), a connecting hole is arranged on the side wall of the connecting sleeve (16), an electric push rod (17) is arranged on the outside of the connecting sleeve (16), the telescopic end of the electric push rod (17) is inserted into the connecting hole, a fixing sleeve (18) is sleeved on the outside of the connecting sleeve (16), the inner wall of the fixing sleeve (18) is rotatably connected to the outer wall of the connecting sleeve (16), a plurality of support rods (19) are arranged on the outer wall of the fixing sleeve (18), one end of the support rod (19) is connected to the outer wall of the fixing sleeve (18), and the other end of the support rod (19) is connected to the inner wall of the protective cover (13); A plurality of dust removal plates (20) are arranged at the bottom of the connecting sleeve (16), one end of the dust removal plate (20) is connected to the outer wall of the connecting sleeve (16), the other end of the dust removal plate (20) is in contact with the inner wall of the protective cover (13), and the bottom wall of the dust removal plate (20) is in contact with the upper surface of the dustproof net (15); A fixed block (21) is arranged at the bottom of the support rod (19), a sliding hole is arranged horizontally in the fixed block (21), a knocking rod (22) is slidably arranged in the sliding hole, an end of the knocking rod (22) close to the output shaft (6) passes through the sliding hole and is provided with a sliding block (23), the sliding block (23) is slidably connected with the support rod (19), a connecting spring (24) is sleeved on the outside of the knocking rod (22), one end of the connecting spring (24) is connected to the fixed block (21), and the other end of the connecting spring (24) is connected to the sliding block (23), a first magnetic block (25) is arranged at an end of the sliding block (23) close to the output shaft (6), a second magnetic block (26) is arranged on the dust removal plate (20), the second magnetic block (26) is located between the first magnetic block (25) and the output shaft (6), and the end of the second magnetic block (26) away from the output shaft (6) has a magnetic pole opposite to the end of the first magnetic block (25) close to the output shaft (6).

2. A horizontal inner rotor fan according to claim 1, characterized in that: A guide ring (7) is arranged at the air inlet, and the outer periphery of the guide ring (7) is connected to the upper end of the volute (2).

3. A horizontal inner rotor fan according to claim 1, characterized in that: The impeller (4) comprises a front disc (8), a middle disc (9), a rear disc (10), blades (11) and a shaft sleeve (12); the middle disc (9) is located between the front disc (8) and the rear disc (10); a plurality of blades (11) are arranged between the front disc (8), the middle disc (9) and the rear disc (10); the middle disc (9) comprises a mounting plate (91), a connecting ring (92) and a connecting ring (93) which are arranged in sequence from top to bottom; the mounting plate (91) is arranged horizontally and is installed A through hole is provided at the center of the plate (91); the upper end of the connecting ring (92) is connected to the outer periphery of the mounting plate (91) and a first rounded corner is provided at the connection; the lower end of the connecting ring (92) is connected to the inner ring of the connecting ring (93) and a second rounded corner is provided at the connection; the connecting ring (93) is connected to the rear disc (10); a shaft sleeve (12) is installed on the mounting plate (91); the shaft sleeve (12) is connected to the output shaft (6) of the motor (3); and a shaft head nut is provided at the upper end of the output shaft (6).

4. A horizontal inner rotor fan according to claim 3, characterized in that: The middle plate (9) is an integrated stamping structure.

5. A horizontal inner rotor fan according to claim 3, characterized in that: The central axes of the front disc (8), the middle disc (9), the rear disc (10) and the shaft sleeve (12) are on the same axis.

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