Magnetic drive pump frequency conversion installation structure

Abstract

The utility model provides a frequency conversion mounting structure of a magnetic drive pump, and belongs to the technical field of magnetic drive pumps. The technical problem that an existing magnetic drive pump frequency conversion installation structure is poor in heat dissipation effect is solved. The frequency conversion installation structure of the magnetic drive pump comprises a pump shell, a stator assembly integrally formed through injection molding is fixedly installed in the pump shell, a rotor assembly integrally formed through injection molding rotates relative to the stator assembly, the rotor assembly is fixedly connected with an impeller, and a frequency conversion shell is fixedly installed on the side, away from the impeller, of the stator assembly and provided with a cylindrical containing cavity. The frequency conversion shell is provided with an integrally-formed heat dissipation plate and a plurality of heat dissipation teeth formed on the heat dissipation plate, the containing cavity and the heat dissipation teeth are located on the two sides of the heat dissipation plate, mounting holes are formed in the heat dissipation plate in the direction towards the heat dissipation teeth in a sunken mode, and a disc-shaped control plate is transversely and fixedly connected into the containing cavity. The side, away from the stator assembly, of the control panel is fixedly connected with a capacitor and a first module, the first module abuts against the heat dissipation plate, the capacitor is embedded into the mounting hole, a mounting groove is formed in the heat dissipation tooth, a heat dissipation fan is arranged in the mounting groove, and the axis of the heat dissipation fan is consistent with a tooth path of the heat dissipation tooth. The LED lamp has a good heat dissipation effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of magnetic pumps, in particular to a variable frequency installation structure for a magnetic pump. Background Art

[0002] The magnetic drive pump consists of a fully enclosed injection-molded stator, rotor, and impeller. When the rotor rotates relative to the stator, it drives the impeller to rotate synchronously. The impeller draws fluid from the pump inlet and transports it to the pump outlet. At this point, the fluid also flows through the outer surfaces of the integrally injection-molded rotor and stator, removing heat. Because the rotor and stator are completely enclosed by injection molding, harmful media leaking through the seals, affecting the service life of the rotor and stator, effectively ensuring the safety and service life of the magnetic drive pump. Because frequency conversion can change the power supply frequency and adjust the load, it can reduce power consumption, minimize losses, and extend the service life of the equipment. Generally, pumps are equipped with a frequency converter. However, the frequency converter is also a heat dissipation device, so its installation structure is also very important.

[0003] Currently, patent number 201510370837X discloses a variable-frequency motor for a water pump. The motor comprises a housing, a stator, a rotor, and a variable-frequency control circuit. The rotor includes a motor shaft, and the housing is provided with an end cap. The output end of the motor shaft is exposed outside the end cap, and a semi-enclosed cavity is formed on the end cap. The variable-frequency control circuit is located within the semi-enclosed cavity. The end cap is also provided with a heat sink, which forms a seal with the semi-enclosed cavity. The outer surface of the heat sink is also provided with a plurality of heat-dissipating teeth. A centrifugal fan is also provided at the output end of the motor shaft, and the centrifugal fan is located on one side of the heat sink. A groove is formed between the plurality of heat-dissipating teeth, and the centrifugal fan is located in the groove. The centrifugal fan is surrounded by the heat-dissipating teeth. However, the heat dissipation effect of the centrifugal fan driven by this structure is still relatively inefficient. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention aims to provide a variable frequency installation structure for a magnetic pump. The technical problem to be solved by the present invention is how to better install and dissipate heat for the variable frequency device of the magnetic pump.

[0005] The objectives of the utility model can be achieved through the following technical solutions: a magnetic pump variable frequency installation structure, including a pump casing, an injection-molded stator assembly fixedly installed in the pump casing, an injection-molded rotor assembly rotates relative to the stator assembly, the rotor assembly is fixedly connected to an impeller, and a variable frequency housing is fixedly installed on the side of the stator assembly away from the impeller, the variable frequency housing has a cylindrical accommodating cavity, the variable frequency housing has an integrally formed heat dissipation plate and a plurality of heat dissipation teeth formed on the heat dissipation plate, the accommodating cavity and the heat dissipation teeth are located on both sides of the heat dissipation plate, the heat dissipation plate is recessed with an installation hole in the direction of the heat dissipation teeth, a disc-shaped control board is fixedly connected laterally in the accommodating cavity, a capacitor and module 1 are fixedly connected to the side of the control board away from the stator assembly, module 1 rests on the heat dissipation plate, the capacitor is embedded in the installation hole, an installation groove is provided in the heat dissipation tooth, a heat dissipation fan is provided in the installation groove, and the axis of the heat dissipation fan is consistent with the tooth path of the heat dissipation tooth.

[0006] This solution securely connects the inverter housing to an injection-molded stator assembly, which is then secured to the pump housing via the stator assembly. A disc-shaped control board is placed in a housing near one end of the inverter housing, with the horizontally positioned control board providing more space for mounting components. The inverter housing also includes a heat sink and several heat dissipation teeth formed thereon. The housing and the heat dissipation teeth are located on either side of the heat sink, and mounting holes are recessed in the heat sink toward the heat dissipation teeth. Module 1 rests against the heat sink, positioned between the heat sink and the control board, with the capacitor positioned within the mounting holes. This arrangement increases the heat dissipation area of ​​Module 1, which is an IGBT module and the primary heat-generating element in the inverter. Therefore, in addition to the heat sink and heat dissipation teeth, a fan is added, with the fan's axis aligned with the tooth path of the heat dissipation teeth to accelerate airflow along the tooth path and cool Module 1. Placing the capacitor and Module 1 on the same side and within the mounting holes reduces the overall structure, reducing the axial dimensions of the entire unit and making it more compact.

[0007] Furthermore, the stator assembly includes a shielding sleeve and a fixed magnet. The shielding sleeve divides the pump housing into two mutually exclusive upper and lower chambers. The upper chamber has an inlet and an outlet, the impeller is disposed in the upper chamber, and the frequency converter housing is disposed in the lower chamber. A certain gap is provided between the control board and the bottom of the shielding sleeve, and the accommodating chamber is sealed with glue. The shielding sleeve divides the pump housing into two mutually exclusive upper and lower chambers. The upper chamber contains fluid for self-cooling. A gap is provided between the control board and the bottom of the shielding sleeve. After installing some components on the control board, the accommodating chamber can be sealed with glue, thereby maintaining the integrity of the frequency converter. The certain gap also isolates the temperature of the frequency converter from that of the stator assembly.

[0008] Furthermore, the tooth paths between the two heat dissipation teeth are in the same direction, which can better dissipate heat.

[0009] Furthermore, the pump housing is provided with heat dissipation holes opposite to the tooth paths, which can better dissipate heat.

[0010] Furthermore, the shielding sleeve is provided with a wire outlet hole, the heat sink is formed with a closed wire passageway toward the heat sink teeth, and a junction box is provided on the end of the heat sink teeth away from the heat sink to cover the wire passageway. The junction box is positioned opposite the cooling fan. The wire outlet hole, wire passageway, and junction box are aligned in the longitudinal direction, facilitating wiring installation and saving overall space.

[0011] Furthermore, the heat sink has two interconnected square slots, one first and two second, recessed toward the heat dissipation teeth. The outer walls of these slots are surrounded by several heat dissipation teeth. Modules two and three are fixedly connected to the side of the control board facing away from the stator assembly. Module two is embedded in square slot one and rests against its bottom wall, while module three is embedded in square slot two and rests against its bottom wall. Modules two and three also generate relatively high amounts of heat, and the presence of heat dissipation teeth surrounding these slots accelerates heat dissipation from these modules.

[0012] Furthermore, three side surfaces of the module are fixedly connected with heat dissipation blocks, which are located in the second square groove and abut against the bottom wall of the second square groove.

[0013] Furthermore, the bottom of the mounting slot is recessed with a first fixing slot toward the heat sink, the upper end of the cooling fan being embedded in the first fixing slot, and the outer ends of the cooling teeth are provided with a second fixing slot opposite the mounting slot. A nameplate is embedded in the fixing slot and fixed to the cooling teeth via a fixing member, with the inner surface of the nameplate resting against the cooling fan, thereby reinforcing the cooling fan and accelerating the airflow through the tooth path.

[0014] Compared with the existing technology, the technical effect of the utility model is: by fixing the frequency conversion housing on the rotor assembly to form an integrated structure and then fixing them together on the pump housing, the frequency conversion housing can be installed conveniently and stably, wherein the heat dissipation plate, heat dissipation teeth, mounting holes and mounting grooves of the frequency conversion housing can make the frequency conversion device better installed on the frequency conversion housing and achieve better heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the utility model.

[0016] Figure 2 The utility model is a three-dimensional Figure 1 .

[0017] Figure 3 The utility model is a three-dimensional Figure 2 .

[0018] Figure 4 It is a three-dimensional diagram of the present utility model.

[0019] Figure 5 It is a three-dimensional diagram of the frequency conversion device of the present utility model.

[0020] Figure 6 It is a partial exploded view of the utility model.

[0021] Figure number marking: 1. Pump housing; 101. Upper cavity; 102. Lower cavity; 103. Heat dissipation hole; 2. Stator assembly; 201. Shielding sleeve; 202. Fixed magnet; 203. Wire outlet hole; 3. Rotor assembly; 4. Impeller; 5. Frequency conversion housing; 501. Accommodating cavity; 6. Heat dissipation plate; 61. Heat dissipation tooth; 601. Mounting hole; 602. Mounting slot; 603. Wire passage; 604. Square slot 1; 605. Square slot 2; 606. Fixed slot 1; 607. Fixed slot 2; 608. Tooth channel; 7. Control board; 8. Capacitor; 9. Module 1; 10. Cooling fan; 11. Junction box; 12. Module 2; 13. Module 3; 14. Heat dissipation block; 15. Nameplate. DETAILED DESCRIPTION

[0022] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0023] It should be noted that the descriptions of the present invention regarding directions such as "up", "down", "left", "right", "top", and "bottom" are all defined based on the relationship between the orientations or positions shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0024] according to Figures 1 to 6 As shown, a variable frequency installation structure of a magnetic pump includes a pump housing 1, a stator assembly 2, a rotor assembly 3, an impeller 4 and a frequency conversion device, wherein the stator assembly 2 includes a fixed magnet 202 and a shielding sleeve 201 that is injection-molded to integrally wrap the fixed magnet 202, and the rotor assembly 3 is also a rotating magnet that is integrally molded by injection molding. The stator assembly 2 is fixedly mounted in the pump housing 1 by fixing bolts. The shielding sleeve 201 separates the pump housing 1 into two mutually unconnected upper chambers 101 and lower chambers 102. The upper chamber 101 has an inlet and an outlet. The impeller 4 is arranged in the upper chamber 101, and the frequency conversion housing 5 is arranged in the lower chamber 102. The rotor assembly 3 rotates relative to the stator assembly 2, and the rotor assembly 3 is fixedly connected to the impeller 4.

[0025] The frequency conversion device includes a frequency conversion housing 5 and a control board 7, a capacitor 8, a module 1 9, a module 2 12, a module 3 13, etc. installed in the frequency conversion housing 5. The frequency conversion housing 5 is fixedly installed on the side of the stator assembly 2 away from the impeller 4, and the frequency conversion housing 5 has a cylindrical accommodating cavity 501. A disc-shaped control board 7 is fixedly connected horizontally in the accommodating cavity 501. A heat sink 6 integrally formed with the frequency conversion housing 5 is also connected to one side of the frequency conversion housing 5. The heat sink 6 is also formed with a plurality of heat dissipation teeth 61 on the side away from the frequency conversion housing 5. The accommodating cavity 501 and the heat dissipation teeth 61 are located on both sides of the heat sink 6. The heat sink 6 is also recessed with a mounting hole 601 in the direction of the heat dissipation teeth 61. The control board 7 is fixedly connected to the capacitor 8 and module 1 9 on the side away from the stator assembly 2. Module 1 9 rests on the heat sink 6, and the capacitor 8 is embedded in the mounting hole 601. The heat dissipation teeth 61 are provided with mounting slots 602, cut into the multiple heat dissipation plates 6. A cooling fan 10 is positioned within these slots, its axis aligned with the tooth path 608 of the heat dissipation teeth 61. The inverter housing 5 is fixedly connected to the integrally injection-molded stator assembly 2, which in turn is secured to the pump housing 1 via the stator assembly 2. The disc-shaped control board 7 is housed in the housing 5, located near one end of the stator assembly 2. The horizontal placement of the control board 7 provides more space for mounting components. The inverter housing 5 also includes a heat sink 6 and several heat dissipation teeth 61 formed thereon. The accommodating cavity 501 and the heat dissipation teeth 61 are located on either side of the heat sink 6. Mounting holes 601 are recessed in the heat sink 6 toward the heat dissipation teeth 61. Module 1-9 rests against the heat sink 6, located between the heat sink 6 and the control board 7. Capacitor 8 is located within the mounting holes 601. This arrangement increases the heat dissipation area of ​​module 1-9. Module 1-9 is an IGBT module, the primary heat-generating component in the inverter. Therefore, in addition to the heat sink 6 and heat dissipation teeth 61, a fan is added. The fan's axis aligns with the tooth path 608 of the heat dissipation teeth 61, accelerating airflow along the tooth path 608 and cooling module 1-9. Placing capacitor 8 and module 1-9 on the same side and within the mounting holes 601 reduces the overall structure, reducing the axial dimensions of the entire device and making it more compact. The tooth paths 608 between the two heat dissipation teeth 61 are aligned. The pump housing 1 is provided with a heat dissipation hole 103 opposite to the tooth path 608 .

[0026] The shielding sleeve 201 separates the pump housing 1 into two mutually unconnected upper chambers 101 and lower chambers 102. The upper chamber 101 has fluid for self-cooling. A gap is left between the control board 7 and the bottom of the shielding sleeve 201. After some components are installed on the control board 7, the accommodating chamber 501 can be sealed with glue to make the frequency converter have integrity. A certain gap can also isolate the temperature of the frequency converter and the temperature of the stator assembly 2.

[0027] The shielding sleeve 201 is provided with a wire outlet 203. The heat sink 6 is formed with a closed wire passage 603 toward the heat dissipation teeth 61. A terminal box 11 is provided at the end of the heat dissipation teeth 61 away from the heat sink 6, which covers the wire passage 603. The terminal box 11 is arranged opposite the cooling fan 10. The wire outlet 203, the wire passage 603, and the terminal box 11 are aligned longitudinally, facilitating wiring installation and saving overall space. The heat sink 6 has a recessed, interconnected square groove 1 604 and square groove 2 605 toward the heat dissipation teeth 61. The outer walls of square groove 1 604 and square groove 2 605 are surrounded by a plurality of heat dissipation teeth 61. Module 2 12 and module 3 13 are fixedly connected to the side of the control board 7 away from the stator assembly 2. Module 2 12 is embedded in square groove 1 604 and abuts against the bottom wall of square groove 1 604. Module 3 13 is embedded in square groove 2 605 and abuts against the bottom wall of square groove 2 605. Module 2 12 and module 3 13 also generate relatively high heat. Square slots 1 604 and 2 605 are surrounded by heat dissipation teeth 61, which accelerate heat dissipation from modules 2 12 and 3 13. A heat sink 14 is fixedly attached to the side of module 3 13. Heat sink 14 is located within square slot 2 605 and abuts against its bottom wall.

[0028] The bottom of the mounting slot 602 is recessed with a fixing slot 1 606, facing the heat sink 6. The upper end of the cooling fan 10 is inserted into fixing slot 1 606. The outer ends of the heat dissipation teeth 61 are provided with fixing slots 2 607, facing the mounting slot 602. A nameplate 15 is embedded in the fixing slots. The nameplate 15 is secured to the heat dissipation teeth 61 via fixings, and the inner surface of the nameplate 15 rests against the cooling fan 10. This reinforces the cooling fan 10 and accelerates the airflow through the gear path 608.

[0029] By fixing the frequency conversion housing 5 on the rotor assembly 3 to form an integrated structure and then fixing them together on the pump housing 1, the frequency conversion housing 5 can be easily and stably installed. The heat dissipation plate 6, heat dissipation teeth 61, mounting holes 601 and mounting grooves 602 of the frequency conversion housing 5 can make the frequency conversion device better installed on the frequency conversion housing 5 and achieve better heat dissipation effect.

[0030] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection defined by the claims of the present invention.

Claims

1. A variable frequency installation structure for a magnetic pump, comprising a pump housing (1), an injection-molded stator assembly (2) fixedly mounted in the pump housing (1), an injection-molded rotor assembly (3) rotating relative to the stator assembly (2), and an impeller (4) fixedly connected to the rotor assembly (3), characterized in that: A frequency conversion housing (5) is fixedly mounted on one side of the stator assembly (2) away from the impeller (4). The frequency conversion housing (5) has a cylindrical accommodating cavity (501). The frequency conversion housing (5) has an integrally formed heat dissipation plate (6) and a plurality of heat dissipation teeth (61) formed on the heat dissipation plate (6). The accommodating cavity (501) and the heat dissipation teeth (61) are located on both sides of the heat dissipation plate (6). The heat dissipation plate (6) has a mounting hole (601) recessed in the direction of the heat dissipation teeth (61). The accommodating cavity (501) is provided with a plurality of heat dissipation teeth (61). ) is laterally fixedly connected to a disc-shaped control board (7), a capacitor (8) and module one (9) are fixedly connected to the side of the control board (7) away from the stator assembly (2), module one (9) is against the heat dissipation plate (6), the capacitor (8) is embedded in the mounting hole (601), a mounting groove (602) is provided in the heat dissipation tooth (61), a heat dissipation fan (10) is provided in the mounting groove (602), and the axis of the heat dissipation fan (10) is consistent with the tooth path (608) of the heat dissipation tooth (61).

2. A magnetic pump variable frequency installation structure according to claim 1, characterized in that: The stator assembly (2) comprises a shielding sleeve (201) and a fixed magnet (202); the shielding sleeve (201) separates the pump housing (1) into two mutually incommunicative upper chambers (101) and lower chambers (102); the upper chamber (101) has an inlet and an outlet; the impeller (4) is disposed in the upper chamber (101); the frequency conversion housing (5) is disposed in the lower chamber (102); a certain gap is formed between the control panel (7) and the bottom of the shielding sleeve (201); and the accommodating chamber (501) is sealed with glue.

3. The variable frequency installation structure of a magnetic pump according to claim 2, characterized in that: The tooth paths (608) between the two heat dissipation teeth (61) are in the same direction.

4. A variable frequency installation structure for a magnetic pump according to claim 3, characterized in that: The pump housing (1) is provided with a heat dissipation hole (103) opposite to the tooth path (608).

5. A variable frequency installation structure for a magnetic pump according to claim 2, 3 or 4, characterized in that: The shielding sleeve (201) is provided with a wire outlet hole (203), the heat dissipation plate (6) is formed with a closed wire passage (603) toward the heat dissipation tooth (61), and a junction box (11) capable of covering the wire passage (603) is provided at one end of the heat dissipation tooth (61) away from the heat dissipation plate (6), and the junction box (11) is arranged opposite to the heat dissipation fan (10).

6. The variable frequency installation structure of a magnetic pump according to claim 1, characterized in that: The heat dissipation plate (6) is recessed with a square groove 1 (604) and a square groove 2 (605) that are interconnected in the direction of the heat dissipation teeth (61). The outer walls of the square groove 1 (604) and the square groove 2 (605) are surrounded by a plurality of heat dissipation teeth (61). The control board (7) is fixedly connected with a module 2 (12) and a module 3 (13) on a side away from the stator assembly (2). The module 2 (12) is embedded in the square groove 1 (604) and abuts against the bottom wall of the square groove 1 (604). The module 3 (13) is embedded in the square groove 2 (605) and abuts against the bottom wall of the square groove 2 (605).

7. The variable frequency installation structure of a magnetic pump according to claim 6, characterized in that: A heat dissipation block (14) is fixedly connected to the side of the module three (13), and the heat dissipation block (14) is located in the square groove two (605) and abuts against the bottom wall of the square groove two (605).

8. The variable frequency installation structure of a magnetic pump according to claim 1, characterized in that: The bottom of the installation groove (602) is recessed with a fixing groove (606) toward the heat dissipation plate (6), the upper end of the heat dissipation fan (10) is embedded in the fixing groove (606), the outer end of the heat dissipation tooth (61) is provided with a fixing groove (607) relative to the installation groove (602), a nameplate (15) is embedded in the fixing groove, the nameplate (15) is fixed to the heat dissipation tooth (61) by a fixing piece, and the inner side surface of the nameplate (15) is against the heat dissipation fan (10).

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