Industrial energy-saving frequency conversion fan

Abstract

The invention discloses an industrial energy-saving variable-frequency fan, and relates to the technical field of fan motor cooling, the industrial energy-saving variable-frequency fan comprises a fan main body, a variable-frequency motor and a cooling fan, and the variable-frequency fan is mounted on the fan main body; the cooling fan is mounted at the tail part of the frequency conversion fan; the cooling device further comprises a first cooling unit and a second cooling unit, wherein the first cooling unit is mounted on the inner side of the cooling fan; the second cooling unit is installed in the frequency conversion fan and used for transferring heat on the frequency conversion fan. Through the arrangement mode that the first cooling unit and the second cooling unit are matched, heat on the variable frequency motor can be transmitted to the first cooling unit through the second cooling unit, the heat dissipation effect is higher than the air heat dissipation effect, heat exchange between the second cooling unit and an inner cavity of the variable frequency motor is facilitated through the cooperation of the cooling fan, and the cooling efficiency is improved. The cooling effect on the variable frequency motor stator is improved, and the cooling efficiency of the motor is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fan motor cooling, and in particular to an industrial energy-saving variable frequency fan. Background Art

[0002] Industrial fans are fans specially used for ventilation and high-temperature smoke exhaust in tunnels, underground garages, high-end civil buildings, metallurgy, factories and mines, etc. Industrial variable frequency fans are mainly composed of a fan body consisting of an impeller, a casing, and a guide vane, and a variable frequency motor and a variable frequency controller. With the development of modern energy conservation and environmental protection, the variable frequency motor of the fan requires energy-saving cooling when in use.

[0003] Many parts of the motor need to be cooled and dissipated. The existing variable frequency motors ventilate and cool the motor housing by adding a cooling fan at the tail of the motor and adding ventilation channels at the front and rear ends of the motor. However, it is well known that the stator winding of the motor directly generates a large amount of resistance heat. When the current passes through the winding, a large amount of heat will be generated due to the existence of resistance. In particular, when the motor runs at high load for a long time, the temperature of the stator winding may increase significantly. Therefore, the stator winding part is usually considered to be the part that needs cooling and dissipation the most. However, since the stator core is arranged outside the stator winding of the motor, although the stator core can partially dissipate heat, the stator core itself is not a special heat dissipation component and has limited heat dissipation performance. If the fan at the tail of the existing motor is used for heat dissipation, the cooling effect of the stator winding part is still poor when the variable frequency motor is running efficiently due to the compact structure inside the housing and the fact that the air heat dissipation effect is not as good as the heat dissipation of the heat conductive part, resulting in slow cooling efficiency of the motor. Summary of the invention

[0004] The object of the present invention is to provide an industrial energy-saving variable frequency fan to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: an industrial energy-saving variable frequency fan, comprising: A fan body and a variable frequency motor, wherein the variable frequency motor is installed on the fan body; A cooling fan, wherein the cooling fan is installed at the tail of the variable frequency motor; Also includes: A first cooling unit, wherein the first cooling unit is installed inside the cooling fan; The second cooling unit is installed inside the variable frequency motor, the second cooling unit is used for transferring heat on the variable frequency motor, and the first cooling unit is used for exchanging heat on the second cooling unit.

[0006] Preferably, the variable frequency motor comprises: A rotor, wherein the rotor is installed between the fan body and the cooling fan; A stator winding, wherein the stator winding is mounted outside the rotor; A front end cover, the front end cover being mounted on one end of the stator winding; A rear cover, wherein the rear cover is mounted on the other end of the stator winding, and the rotor is rotatably inserted into the middle of the rear cover through a bearing; The heat dissipation shell is installed between the rear cover shell and the front cover by screws.

[0007] Preferably, the first cooling unit comprises: A heat sink, the heat sink being arranged in the inner cavity of the rear cover; A first heat-conducting rod, which is installed on the back of the heat sink and is connected to one end of the rear cover through insertion; A positioning assembly, which is arranged in the middle of the heat sink and is used for stabilizing the position of the heat sink and cleaning the heat sink; A tension spring and an arc rod, wherein the tension spring is sleeved on the outside of the arc rod, and the tension spring and the arc rod are installed on the positioning assembly.

[0008] Preferably, the heat sink comprises: A heat sink, the heat sink is arranged on the back of the cooling fan, and the first heat conducting rod is fixed on the outer side of the heat sink; A heat dissipation groove, wherein the heat dissipation groove is provided on the surface of the heat dissipation plate; The ventilation hole is opened in the inner cavity of the heat dissipation slot.

[0009] Preferably, the positioning component comprises: A positioning ring, the positioning ring rotates in the middle of the heat sink; A raised portion, the raised portion is fixed to the top of the positioning ring, and the raised portion is interlaced and connected with the middle portion of the rear cover; A through slot, the through slot being opened on one side of the positioning ring; A connecting block, the connecting block is fixed to the outer wall of the positioning ring, and the connecting block is rotatably connected with the middle part of the heat sink; A cleaning piece is fixed to the outer wall of the positioning ring and is used to push away dust and dirt in the inner cavity of the heat dissipation groove.

[0010] Preferably, the arc rod is interlaced and connected with the middle part of the connecting block, and the tension spring is fixed between the adjacent connecting blocks and the heat dissipation plate.

[0011] Preferably, the rear cover comprises: A shell body, wherein the shell body is fixed to one end of the heat dissipation shell; A matching groove, wherein the matching groove is provided in the middle of the shell; A first compression spring, wherein the first compression spring is fixed to one side of the inner wall of the matching groove; A clamping rod, the clamping rod being fixed to one end of the first compression spring and being slidably connected with one side of the matching groove; A card slot is provided on the other side of the inner wall of the matching slot.

[0012] Preferably, the second cooling unit comprises: A first heat transfer ring, wherein the first heat transfer ring is sleeved on one end of the stator winding; A second heat transfer ring, wherein the second heat transfer ring is sleeved on the other end of the stator winding; Insulating thermally conductive adhesive, the insulating thermally conductive adhesive is attached to the end of the stator winding, and the first heat transfer ring and the second heat transfer ring are used for heat exchange of the stator winding through the insulating thermally conductive adhesive; A second heat-conducting rod, the second heat-conducting rod is fixed to the outer wall of the first heat-conducting sleeve; A connecting mechanism is installed on the outer wall of the second heat transfer ring and is used for connection and heat exchange between the first heat conduction rod, the second heat conduction rod and the second heat transfer ring.

[0013] Preferably, the connecting mechanism comprises: A holder, the holder is fixed to the outer wall of the second heat transfer sleeve by bolts, and the first heat conducting rod and the second heat conducting rod are respectively fitted and interlaced with the two ends of the holder; A first clamping member, the first clamping member is rotated and inserted into the top of the clamping seat through a pin shaft, and the first clamping member is used for the insertion and clamping of the second heat conducting rod; A second clamping member, the second clamping member is rotatably inserted into the bottom of the clamping seat through a pin shaft, and the second clamping member is used for inserting and clamping the first heat-conducting rod; The spring sheet is attached to the outer wall of the second heat transfer sleeve, the two ends of the spring sheet are attached to the outer walls of the first clamp and the second clamp respectively, and the clamp seat is inserted and clamped with the middle part of the spring sheet; The push-up assembly is installed in the middle of the card seat.

[0014] Preferably, the jacking assembly comprises: A conical member, the conical member is slidably and interlacedly connected with the middle portion of the holder; A second compression spring, wherein the second compression spring is fixed to the middle of the holder and sleeved on the outside of the conical member; A pressing block, the pressing block is fixed to the bottom of the conical block, and the pressing block is fixedly connected to the bottom of the second compression spring; The embedding groove is arranged on the outer wall of the pressing block, and one end of the spring is connected with the inner cavity of the embedding groove through insertion.

[0015] Technical effects and advantages of the present invention: The present invention adopts a configuration mode in which the first cooling unit and the second cooling unit cooperate with each other, so that the heat on the variable frequency motor can be transferred to the first cooling unit through the second cooling unit, and the heat dissipation effect is higher than the heat dissipation effect of air. In addition, with the action of the cooling fan, the heat on the first cooling unit can be quickly evaporated and dissipated, which is convenient for the second cooling unit to perform heat exchange with the inner cavity of the variable frequency motor, thereby improving the cooling effect on the stator of the variable frequency motor and improving the cooling efficiency of the motor. The present invention adopts a configuration mode in which the first cooling unit cooperates with the cooling fan, wherein the first cooling unit includes a heat sink, a first heat conducting rod, a positioning assembly, a tension spring and an arc rod. The configuration of the heat sink enables the cooling fan to dissipate the heat from the inner cavity of the variable frequency motor, and the air circulates in the heat sink to accelerate the dissipation of the heat on the heat sink. The connection between the first heat conducting rod and the second cooling unit enables the heat to be solidly conducted, thereby accelerating the cooling efficiency of the variable frequency motor and making the use of the fan more stable. The configuration of the positioning assembly and the tension spring makes the disassembly and assembly of the heat sink on the variable frequency motor convenient. The present invention adopts a setting method of the second cooling unit, wherein the second cooling unit includes a first heat transfer ring, a second heat transfer ring, an insulating heat-conducting adhesive, a second heat-conducting rod and a connecting mechanism. The fin structure on the first heat transfer ring and the second heat transfer ring is convenient to increase the heat dissipation area of ​​the stator winding on the variable frequency motor, and the insulating heat-conducting adhesive is used to quickly transfer the heat on the stator winding to the first heat transfer ring and the second heat transfer ring. At the same time, the insulation between the first heat transfer ring and the second heat transfer ring can also be ensured, so that the normal use of the variable frequency motor is not affected. Through the setting of the connecting mechanism, the first heat transfer ring, the second heat transfer ring and the first cooling unit are connected to achieve heat transfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the fan of the present invention.

[0017] Figure 2 It is a schematic diagram of the internal structure of the variable frequency motor of the present invention.

[0018] Figure 3 It is a schematic diagram of the local structure of the second heat transfer ring of the present invention.

[0019] Figure 4 It is a schematic diagram of the overall structure of the variable frequency motor of the present invention from top view.

[0020] Figure 5 It is a schematic diagram of the front structure of the heat dissipation plate of the present invention.

[0021] Figure 6 For the present invention Figure 4 Schematic diagram of the local enlarged structure at point A in the middle.

[0022] Figure 7 It is a schematic structural diagram of the present invention when the first heat conducting rod and the second heat conducting rod are not connected.

[0023] Figure 8 It is a schematic diagram of the overall structure of the positioning ring of the present invention.

[0024] Fig. 9 For the present invention Figure 4 Schematic diagram of the local enlarged structure at point B in the middle.

[0025] Fig.10 For the present invention Figure 4 Schematic diagram of the partial enlarged structure at point C in the middle.

[0026] In the figure: 1, fan body; 2, variable frequency motor; 21, rotor; 22, stator winding; 23, front cover; 24, rear cover; 241, shell; 242, matching groove; 243, first compression spring; 244, clamping rod; 245, clamping groove; 25, heat dissipation shell; 3, cooling fan; 4, first cooling unit; 41, heat dissipation seat; 411, heat dissipation plate; 412, heat dissipation groove; 413, ventilation hole; 42, first heat conduction rod; 43, positioning assembly; 431, positioning ring; 432, protrusion ; 433, through-slot; 434, connecting block; 435, cleaning member; 44, tension spring; 45, arc rod; 5, second cooling unit; 51, first heat transfer ring; 52, second heat transfer ring; 53, insulating thermally conductive adhesive; 54, second thermally conductive rod; 55, connecting mechanism; 551, holder; 552, first clamping member; 553, second clamping member; 554, spring piece; 555, pushing assembly; 5551, conical member; 5552, second compression spring; 5553, pressing block; 5554, embedded groove. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The present invention provides Figure 1-10 An industrial energy-saving variable frequency fan is shown, comprising: A fan body 1, a variable frequency motor 2, a cooling fan 3, a first cooling unit 4 and a second cooling unit 5, the variable frequency motor 2 is installed on the fan body 1, the fan body 1 is an existing structure assembled from an impeller, a casing and a guide vane, the cooling fan 3 is installed at the tail of the variable frequency motor 2, and the cooling fan 3 is used to discharge hot air from the variable frequency motor 2.

[0029] The variable frequency motor 2 includes: a rotor 21, a stator winding 22, a front end cover 23, a rear cover 24 and a heat dissipation shell 25. The rotor 21 is installed between the fan body 1 and the cooling fan 3. The stator winding 22 is installed on the outside of the rotor 21. The front end cover 23 is installed at one end of the stator winding 22. The rear cover 24 is installed at the other end of the stator winding 22. One end of the rear cover 24 is a hollow ventilation net structure. The rotor 21 is inserted into the middle of the rear cover 24 through a bearing. The rotor 21 is inserted into the front end cover 25 through a bearing. The heat dissipation shell 25 is installed between the rear cover 24 and the front cover 23 by screws, and a stator core is installed between the stator winding 22 and the heat dissipation shell 25, and a terminal box is installed on the outer wall of the heat dissipation shell 25, so that the motor 2 can work stably, and the cooling fan 3 and the fan body 1 are respectively fixed to the two ends of the rotor 21, so that the rotor 21 can drive the cooling fan 3 to rotate, and through holes are opened on the front cover 23 and the rear cover 24, so that the wind can flow from the front cover 23 to the rear cover 24; The rear cover 24 includes: a shell 241, a matching groove 242, a first compression spring 243, a clamping rod 244 and a clamping groove 245. The shell 241 is fixed to one end of the heat dissipation shell 25. The shell 241 includes a rear end plate and an outer cover, and the outer cover and the rear end plate are fixedly installed by screws. The cooling fan 3 and the first cooling unit 4 are both arranged in the inner cavity of the shell 241, and a through hole is opened on the rear end plate of the shell 241, so that the air in the inner cavity of the heat dissipation shell 25 can be discharged through the through hole. One end of the shell 241 is a hollow ventilation net structure, so that when the cooling fan 3 rotates, the air in the inner cavity of the shell 241 can pass through the hollow The ventilation net is used for circulation, and the matching groove 242 is opened in the middle of the shell 241, that is, the matching groove 242 is opened on the rear end plate, the first compression spring 243 is fixed to one side of the inner wall of the matching groove 242, and the clamping rod 244 is fixed to one end of the first compression spring 243. The first compression spring 243 is sleeved on the outside of the clamping rod 244, and the clamping rod 244 is slidably connected with one side of the matching groove 242. Through the setting of the clamping rod 244, the first compression spring 243 can be used stably. At the same time, through the first compression spring 243, the clamping rod 244 can be elastically pushed, and the clamping groove 245 is opened on the other side of the inner wall of the matching groove 242.

[0030] Furthermore, the first cooling unit 4 is installed on the inner side of the cooling fan 3; the second cooling unit 5 is installed inside the variable frequency motor 2, the second cooling unit 5 is used for transferring heat on the variable frequency motor 2, the first cooling unit 4 is used for exchanging heat on the second cooling unit 5, the first cooling unit 4 includes: a heat sink 41, a first heat-conducting rod 42, a positioning assembly 43, a tension spring 44 and an arc rod 45, the heat sink 41 is arranged in the inner cavity of the rear cover 24, the heat sink 41 and the first heat-conducting rod 42 are both composed of a heat-conducting material, the first heat-conducting rod 42 is installed on the back of the heat sink 41, and the first heat-conducting rod 42 is connected with one end of the rear cover 24 through an interlaced connection, the positioning assembly 43 is arranged in the middle of the heat sink 41, the positioning assembly 43 is used for stabilizing the position of the heat sink 41 and cleaning the heat sink 41, the tension spring 44 is sleeved on the outside of the arc rod 45, and the tension spring 44 and the arc rod 45 are installed on the positioning assembly 43; Specifically, the heat sink 41 includes: a heat sink 411, a heat sink slot 412 and a ventilation hole 413. The heat sink 411 is arranged on the back of the cooling fan 3. The first heat-conducting rod 42 is fixed to the outer side of the heat sink 411, so that the heat on the first heat-conducting rod 42 can be transferred to the heat sink 411. The heat sink 412 is opened on the surface of the heat sink 411, so as to increase the heat dissipation area on the heat sink 411. A plurality of heat sinks 412 are opened on the surface of the heat sink 411 in the form of sleeves of different diameters. The ventilation hole 413 is opened in the inner cavity of the heat sink 412. A plurality of ventilation holes 413 are opened on the inner wall of the same heat sink 412, and the ventilation hole 413 can communicate with the inner cavity of a plurality of through holes on the shell 241, so that air can pass through the heat sink 411, so that the air can circulate normally. The positioning assembly 43 includes: a positioning ring 431, a protrusion 432, a through-slot 433, a connecting block 434 and a cleaning member 435. The positioning ring 431 rotates in the middle of the heat sink 41, and the positioning ring 431 is rotatably connected with the middle of the heat sink 411. The protrusion 432 is fixed to the top of the positioning ring 431. The protrusion 432 is an eccentric elliptical ring structure. The protrusion 432 is connected with the middle of the rear cover 24 through the through-slot 242. The opposite structure of the protrusion 432 is consistent with the manual rotation. The positioning ring 431 is rotated so that the protrusion 432 can penetrate into the inner cavity of the matching groove 242, and the protruding outer wall of the protrusion 432 can squeeze the clamping rod 244. The positioning ring 431 is rotated in the opposite direction, so that the protrusion 432 and the inner cavity of the clamping groove 245 can be rotated and inserted, so that the protrusion 432 can be stably in the inner cavity of the clamping groove 245. The insertion slot 433 is provided on one side of the positioning ring 431. After the positioning ring 431 is rotated in the opposite direction, the clamping rod 244 can slide into the inner cavity of the insertion slot 433, so that the clamping rod 244 can press the positioning ring 431 is supported so that the positioning ring 431 can be stably inserted into the housing 241, the connecting block 434 is fixed to the outer wall of the positioning ring 431, the connecting block 434 is rotatably connected with the middle of the heat sink 411, a plurality of fan-shaped grooves are provided in the middle of the heat sink 411, the connecting block 434 is rotatably connected with the inner cavity of the fan-shaped groove in the middle of the heat sink 411, the arc rod 45 is connected with the middle of the connecting block 434, the tension spring 44 is fixed between the adjacent connecting block 434 and the heat sink 411, and the arc rod 45 is fixed to the fan The inner wall of the shaped groove, the tension spring 44 can be stretched when the positioning ring 431 is rotated, and after the positioning ring 431 is loosened, the tension spring 44 recovers its elasticity, so that the positioning ring 431 does not need to be manually rotated in the opposite direction, and the reverse rotation of the positioning ring 431 can be achieved, which is convenient for using the positioning assembly 43 so that the heat sink 41 can be stabilized in the inner cavity of the housing 241. The cleaning member 435 is fixed to the outer wall of the positioning ring 431. The cleaning member 435 is used to push the dirt in the inner cavity of the heat sink 412. The cleaning member 435 is composed of a straight rod and an arc-shaped sharp block, such as Figure 8 As shown, the arc-shaped sharp block can push the inner cavity of the heat dissipation groove 412, so that the dust and dirt can be pushed out of the inner cavity of the heat dissipation groove 412, reducing the accumulation of dust and dirt on the heat dissipation seat 41 and improving the heat dissipation efficiency of the heat dissipation seat 41.

[0031] Furthermore, the second cooling unit 5 includes: a first heat transfer ring 51, a second heat transfer ring 52, an insulating heat conductive adhesive 53, a second heat conductive rod 54 and a connecting mechanism 55. The first heat transfer ring 51 is sleeved on one end of the stator winding 22, and the second heat transfer ring 52 is sleeved on the other end of the stator winding 22. The first heat transfer ring 51 and the second heat transfer ring 52 are both assembled and clamped by two semicircular rings. The outer walls of the first heat transfer ring 51 and the second heat transfer ring 52 are both heat dissipation fin structures, which are convenient for increasing the heat dissipation area of ​​the first heat transfer ring 51 and the second heat transfer ring 52, while not affecting the flow of air, so that the air heat dissipation in the inner cavity of the heat dissipation shell 25 is not affected. The insulating heat conductive adhesive 53 is attached to the end of the stator winding 22, and the first heat transfer ring 51 The first heat transfer ring 51 and the second heat transfer ring 52 are used for heat exchange of the stator winding 22 through the insulating heat conductive adhesive 53. The insulating heat conductive adhesive 53 allows the first heat transfer ring 51 and the second heat transfer ring 52 to be stably located at both ends of the stator winding 22, which is convenient for cooling the non-stator core area. The second heat conductive rod 54 is fixed to the outer wall of the first heat transfer ring 51. The second heat conductive rod 54 is inserted into the non-stator core area. The second heat conductive rod 54 and the first heat conductive rod 42 are both made of heat-conducting and insulating aluminum materials, so that they do not affect the stable rotation of the inner rotor 21 of the variable frequency motor 2, which is convenient for the heat on the first heat transfer ring 51 to be transferred to the second heat conductive rod 54. One end of the second heat conductive rod 54 is in contact with the outer wall of the second heat transfer ring 52 for heat conduction, which is convenient for smooth heat transfer. The connecting mechanism 55 is installed on the outer wall of the second heat transfer sleeve 52. The connecting mechanism 55 is used for connection and heat exchange between the first heat transfer rod 42, the second heat transfer rod 54 and the second heat transfer sleeve 52. The connecting mechanism 55 includes: a clamping seat 551, a first clamping member 552, a second clamping member 553, a spring 554 and a push assembly 555. The clamping seat 551 is fixed to the outer wall of the second heat transfer sleeve 52 by bolts. When the second heat transfer sleeve 52 is sleeved on the stator winding 22, the clamping seat 551 can be installed. The clamping seat 551 is made of aluminum material with good heat conduction. The first heat transfer rod 42 is provided with a plurality of heat transfer rods, and the second heat transfer rod 54 ... 2. The second heat-conducting rod 54 is respectively fitted and connected with both ends of the holder 551, so that the heat on the second heat-conducting rod 54 and the heat on the second heat transfer ring 51 can be transferred to the first heat-conducting rod 42 through the holder 551. The first clamping member 552 is inserted into the top of the holder 551 through the rotation of the pin. The opposite ends of the first heat-conducting rod 42 and the second heat-conducting rod 54 are provided with a groove body that matches the first clamping member 552 and the second clamping member 553. The first clamping member 552 is used for the insertion and clamping of the second heat-conducting rod 54. The second clamping member 553 is inserted into the top of the holder 551 through the rotation of the pin. At the bottom, the second clamping piece 553 is used for the insertion clamping of the first heat-conducting rod 42, and the second clamping piece 553 is elastic. The second clamping piece 553 can be elastically clamped with the first heat-conducting rod 42, that is, the first heat-conducting rod 42 can be pulled out of the second clamping piece 553 through the chamfer on the second clamping piece 553, which is convenient for the second clamping piece 553 to assist in positioning the first heat-conducting rod 42, and convenient for the disassembly and assembly of the first heat-conducting rod 42 and the second clamping piece 553. The spring piece 554 is attached to the outer wall of the second heat transfer ring 52, and the two ends of the spring piece 554 are respectively attached to the first clamping piece 552 and the second clamping piece 553. The outer wall of the clamping seat 551 is inserted and clamped with the middle part of the spring piece 554, so that when the clamping seat 551 is installed, the spring piece 554 can be clamped and limited to stabilize the position of the spring piece 554. The first clamping member 552 and the second clamping member 553 are convenient for clamping and fixing the first heat conducting rod 42 and the second heat conducting rod 54, so that the positions of the first heat conducting ring 51, the second heat conducting ring 52, and the first heat conducting rod 42 and the second heat conducting rod 54 can be kept stable. Even if the motor vibrates, the first heat conducting ring 51 and the second heat conducting ring 52 will not change position at will. Specifically, the push assembly 555 is installed in the middle of the card seat 551, and the push assembly 555 includes: a conical member 5551, a second compression spring 5552, a pressing block 5553 and an embedded groove 5554. The conical member 5551 is slidably connected with the middle of the card seat 551. The conical member 5551 is fixed by a conical head and a rod-shaped structure. The second compression spring 5552 is fixed to the middle of the card seat 551. The second compression spring 5552 is sleeved on The pressing block 5553 is fixed to the bottom of the conical member 5551, and the pressing block 5553 is fixedly connected to the bottom of the second compression spring 5552. The embedding groove 5554 is provided on the outer wall of the pressing block 5553, and one end of the spring 554 is inserted and connected with the inner cavity of the embedding groove 554. The first heat-conducting rod 42 can press and push one end of the pressing block 5553, and the first heat-conducting rod 42 is inserted into the shell 241 and then extended. One end of the card seat 551 is inserted into the card seat, so that the pressing block 5553 is pushed, and the second compression spring 5552 is compressed. The top of the conical member 5551 pushes the first card member 552, and the other end of the spring piece 554 is pressed, so that the first card member 552 can be inserted and clamped to the second heat-conducting rod 54. At the same time, the spring piece 554 embedded in the inner cavity of the groove 5554 is pressed, so that the second card member 553 attached to the spring piece 554 rotates to clamp and limit the first heat-conducting rod 42, so as to maintain the position stability between the first heat transfer ring 51 and the second heat transfer ring 52. After the first cooling unit 4 is disassembled, the second heat-conducting rod 54 passes through the inner cavity of the card seat 551, the second compression spring 5552 recovers its elasticity, and the spring piece 554 recovers its elasticity, so that the connecting mechanism 55 does not limit the position of the second heat-conducting rod 54 and the first heat-conducting rod 42, so as to facilitate the disassembly and assembly of the second cooling unit 5.

[0032] Working principle of the present invention: The first heat transfer ring 51 and the second heat transfer ring 52 are attached to the two ends of the stator winding 22 through the insulating heat conductive adhesive 53, the holder 551 is installed on the outer wall of the second heat transfer ring 52 through screws, and the first heat conductive rod 42 is inserted and connected with one end of the holder 551, and the first heat conductive rod 42 is inserted and connected with the rear cover 24, and the positioning ring 431 is rotated, the tension spring 44 can be stretched, and the protrusion 432 can extend into the inner cavity of the matching groove 242, and the positioning ring 431 is loosened. After the ring 431 is released, the tension spring 44 recovers its elasticity, the positioning ring 431 rotates in the opposite direction, the protrusion 432 slides into the inner cavity of the card slot 245, and the card rod 244 is engaged with the inner cavity of the through-slot 433, so that the position of the heat sink 41 in the inner cavity of the rear cover 24 is stabilized. When the heat sink 412 on the heat sink 41 needs to be disassembled, the outer cover on the rear cover 24 is removed, and the positioning ring 431 is rotated, so that the cleaning member 435 can remove the dirt in the inner cavity of the heat sink 412; The first heat-conducting rod 42 is inserted into the housing 241 and then extends into the other end of the clamping seat 551, so that the pressing block 5553 is pushed up, so that the second compression spring 5552 is compressed, and the top of the conical member 5551 pushes the first clamping member 552, and the other end of the spring sheet 554 is pressed, so that the first clamping member 552 can be inserted and clamped to the second heat-conducting rod 54, and at the same time, the spring sheet 554 embedded in the inner cavity of the groove 5554 is pressed, so that the second clamping member 553 attached to the spring sheet 554 rotates to clamp and limit the first heat-conducting rod 42, so as to facilitate the retention of the first heat transfer ring 51 and the second heat transfer ring The position stability between 52 is achieved by inserting the screws and the threads between the rear cover shell 24 and the heat dissipation shell 25, so that the position of the rear cover shell 24 and the heat dissipation shell 25 is fixed, and the position of the heat dissipation seat 41 is stable. When the frequency conversion motor 2 is in use, the cooling fan 3 rotates so that the air flow in the inner cavity of the heat dissipation shell 25 can circulate, and the heat on the stator winding 22 can be transferred to the heat dissipation seat 41 through the first heat transfer ring 51, the second heat conduction rod 52, the second heat transfer ring 52 and the first heat conduction rod 42 for heat evaporation, thereby improving the cooling efficiency of the frequency conversion motor 2 and improving the energy saving effect of the frequency conversion fan.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An industrial energy-saving variable frequency fan, comprising: A fan body (1) and a variable frequency motor (2), wherein the variable frequency motor (2) is mounted on the fan body (1); A cooling fan (3), wherein the cooling fan (3) is installed at the rear of the variable frequency motor (2); It is characterized by further comprising: A first cooling unit (4), the first cooling unit (4) being installed on the inner side of the cooling fan (3); A second cooling unit (5), the second cooling unit (5) is installed inside the variable frequency motor (2), the second cooling unit (5) is used for transferring heat on the variable frequency motor (2), and the first cooling unit (4) is used for exchanging heat on the second cooling unit (5).

2. An industrial energy-saving variable frequency fan according to claim 1, characterized in that: The variable frequency motor (2) comprises: A rotor (21), wherein the rotor (21) is installed between the fan body (1) and the cooling fan (3); A stator winding (22), wherein the stator winding (22) is installed outside the rotor (21); A front end cover (23), the front end cover (23) being mounted on one end of the stator winding (22); A rear cover (24), the rear cover (24) being mounted on the other end of the stator winding (22), and the rotor (21) being rotatably inserted into the middle of the rear cover (24) via a bearing; A heat dissipation shell (25) is installed between the rear cover shell (24) and the front cover (23) by means of screws.

3. An industrial energy-saving variable frequency fan according to claim 2, characterized in that: The first cooling unit (4) comprises: A heat sink (41), the heat sink (41) being arranged in the inner cavity of the rear cover (24); A first heat-conducting rod (42), the first heat-conducting rod (42) being mounted on the back of the heat sink (41), and the first heat-conducting rod (42) being interlaced and connected with one end of the rear cover (24); A positioning component (43), the positioning component (43) being arranged in the middle of the heat sink (41), the positioning component (43) being used for stabilizing the position of the heat sink (41) and cleaning the heat sink (41); A tension spring (44) and an arc rod (45), wherein the tension spring (44) is sleeved on the outside of the arc rod (45), and the tension spring (44) and the arc rod (45) are installed on the positioning assembly (43).

4. The industrial energy-saving variable frequency fan according to claim 3, characterized in that: The heat sink (41) comprises: A heat sink (411), the heat sink (411) being arranged on the back side of the cooling fan (3), and the first heat conducting rod (42) being fixed on the outside of the heat sink (411); A heat dissipation groove (412), wherein the heat dissipation groove (412) is provided on the surface of the heat dissipation plate (411); A ventilation hole (413), wherein the ventilation hole (413) is opened in the inner cavity of the heat dissipation groove (412).

5. The industrial energy-saving variable frequency fan according to claim 4, characterized in that: The positioning component (43) comprises: A positioning ring (431), wherein the positioning ring (431) rotates at the middle of the heat sink (41); A raised portion (432), the raised portion (432) being fixed to the top of the positioning ring (431), the raised portion (432) being interpenetratingly connected to the middle portion of the rear cover shell (24); A through slot (433), wherein the through slot (433) is provided on one side of the positioning ring (431); A connecting block (434), the connecting block (434) being fixed to the outer wall of the positioning ring (431), the connecting block (434) being rotatably interlaced and connected to the middle of the heat dissipation plate (411); A cleaning piece (435), the cleaning piece (435) being fixed to the outer wall of the positioning ring (431), and the cleaning piece (435) being used to push away dust and dirt from the inner cavity of the heat dissipation groove (412).

6. An industrial energy-saving variable frequency fan according to claim 5, characterized in that: The arc rod (45) is connected through the middle of the connection block (434), and the tension spring (44) is fixed between the adjacent connection block (434) and the heat dissipation plate (411).

7. The industrial energy-saving variable frequency fan according to claim 2, characterized in that: The rear cover (24) comprises: A shell (241), wherein the shell (241) is fixed to one end of the heat dissipation shell (25); A matching groove (242), wherein the matching groove (242) is provided in the middle of the housing (241); A first compression spring (243), the first compression spring (243) being fixed to one side of the inner wall of the matching groove (242); A clamping rod (244), the clamping rod (244) being fixed to one end of the first compression spring (243), the clamping rod (244) being slidably interlaced with one side of the matching groove (242); A clamping groove (245), wherein the clamping groove (245) is opened on the other side of the inner wall of the matching groove (242).

8. The industrial energy-saving variable frequency fan according to claim 2, characterized in that: The second cooling unit (5) comprises: A first heat transfer ring (51), wherein the first heat transfer ring (51) is sleeved on one end of the stator winding (22); A second heat transfer ring (52), wherein the second heat transfer ring (52) is sleeved on the other end of the stator winding (22); Insulating heat-conducting adhesive (53), the insulating heat-conducting adhesive (53) being attached to the end of the stator winding (22), and the first heat-conducting collar (51) and the second heat-conducting collar (52) being used for heat exchange of the stator winding (22) through the insulating heat-conducting adhesive (53); A second heat-conducting rod (54), the second heat-conducting rod (54) being fixed to the outer wall of the first heat-conducting sleeve (51); A connecting mechanism (55) is installed on the outer wall of the second heat transfer sleeve (52), and is used for connection and heat exchange between the first heat transfer rod (42), the second heat transfer rod (54) and the second heat transfer sleeve (52).

9. An industrial energy-saving variable frequency fan according to claim 8, characterized in that: The connecting mechanism (55) comprises: A holder (551), the holder (551) being fixed to the outer wall of the second heat transfer sleeve (52) by means of bolts, the first heat conducting rod (42) and the second heat conducting rod (54) being respectively fitted and interlaced with two ends of the holder (551); A first clamping member (552), the first clamping member (552) being inserted into the top of the clamping seat (551) by rotating through a pin shaft, and the first clamping member (552) being used for inserting and clamping the second heat conducting rod (54); A second clamping member (553), the second clamping member (553) being inserted into the bottom of the clamping seat (551) by rotating through a pin shaft, and the second clamping member (553) being used for inserting and clamping the first heat-conducting rod (42); A spring sheet (554), the spring sheet (554) being attached to the outer wall of the second heat transfer sleeve (52), the two ends of the spring sheet (554) being attached to the outer walls of the first clamping member (552) and the second clamping member (553) respectively, and the clamping seat (551) being inserted and clamped with the middle part of the spring sheet (554); A push-up assembly (555), wherein the push-up assembly (555) is installed in the middle of the clamping seat (551).

10. An industrial energy-saving variable frequency fan according to claim 9, characterized in that: The jacking assembly (555) comprises: A conical member (5551), wherein the conical member (5551) is slidably interlaced with the middle portion of the holder (551); a second compression spring (5552), the second compression spring (5552) being fixed to the middle portion of the clamping seat (551), and the second compression spring (5552) being sleeved on the outside of the conical member (5551); A pressing block (5553), wherein the pressing block (5553) is fixed to the bottom of the conical block (5551), and the pressing block (5553) is fixedly connected to the bottom of the second compression spring (5552); An embedding groove (5554) is provided on the outer wall of the pressing block (5553), and one end of the spring sheet (554) is interlaced and connected with the inner cavity of the embedding groove (554).

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