A frequency converter

Abstract

The present invention relates to a technical solution for a frequency converter, and in particular to a frequency converter, comprising a main body, a circuit board being arranged in the main body, a cover shell being further arranged on the main body, the cover shell being detachably connected to the main body, the circuit board being arranged on the lower side of the cover shell, a control board being arranged on the cover shell corresponding to the circuit board, the control board being electrically connected to the circuit board and being used to control the circuit board; an expansion board is further arranged on the circuit board, the expansion board is arranged perpendicular to the circuit board, the expansion board is electrically connected to the circuit board, and the expansion board is fixedly connected to the circuit board. Setting the expansion board perpendicular to the circuit board can make the expansion board and the circuit board more stable, reduce the extrusion between the expansion board and the circuit board, thereby reducing the situation where the circuit board is affected by the expansion board when shaking, further improving product quality, and increasing service life, and the expansion board has a smaller extrusion range on the circuit board when tipping over, which can reduce damage to a certain extent.

Description

Technical Field

[0001] The invention relates to a frequency converter technical solution, in particular to a frequency converter. Background Art

[0002] The frequency converter is a power control device that uses frequency conversion technology and microelectronics technology to control AC motors by changing the frequency of the motor's working power supply. The frequency converter is mainly composed of rectification (AC to DC), filtering, inversion (DC to AC), braking unit, drive unit, detection unit, and microprocessor unit. The frequency converter adjusts the voltage and frequency of the output power supply by the internal IGBT's opening and closing, and provides the required power supply voltage according to the actual needs of the motor, thereby achieving the purpose of energy saving and speed regulation. In addition, the frequency converter has many protection functions, such as over-current, over-voltage, overload protection, etc. With the continuous improvement of industrial automation, frequency converters have also been widely used.

[0003] The inverter usually needs to be controlled by a circuit board, which is installed inside the inverter. Therefore, the inverter needs to be set according to the length and width of the circuit board. If the circuit board is too long, it will easily affect the stability of the inverter. Under the existing technology, the circuit boards are usually stacked for installation, but after stacking, the circuit boards are still prone to instability when shaking. Summary of the invention

[0004] To solve the problem that the inverter in the prior art usually needs to be controlled by a circuit board, the circuit board is installed in the inverter, so the inverter needs to be set according to the length and width of the circuit board. If the circuit board is too long, it will easily affect the stability of the inverter. The prior art usually adopts the method of overlapping the circuit boards for installation, but after overlapping, the circuit board is still prone to instability when shaking. The present application provides a inverter, and the specific solution is as follows.

[0005] A frequency converter comprises a body, a circuit board is arranged in the body, a cover is arranged on the body, the cover is detachably connected to the body, the circuit board is arranged on the lower side of the cover, a control board is arranged on the cover corresponding to the circuit board, the control board is electrically connected to the circuit board and is used to control the circuit board;

[0006] An expansion board is also arranged on the circuit board. The expansion board is arranged perpendicular to the circuit board, the expansion board is electrically connected to the circuit board, and the expansion board is fixedly connected to the circuit board.

[0007] By adopting the above technical solution and arranging the expansion board vertically to the circuit board, the expansion board and the circuit board can be made more stable and the extrusion between the expansion board and the circuit board can be reduced, thereby reducing the situation where the circuit board is affected by the expansion board when shaking, further improving product quality and service life. In addition, when tipping over, the extrusion range of the expansion board on the circuit board is also smaller, which can reduce damage to a certain extent.

[0008] Optionally, a socket is provided on the circuit board, and an insert block is provided on the expansion board corresponding to the socket. The insert blocks are arranged at equal intervals along the length direction of the expansion board. The insert blocks are used to be inserted into the socket. When the insert blocks are inserted into the socket, the expansion board abuts against the circuit board.

[0009] By adopting the above technical solution, setting the plug block and the plug hole, inserting and then fixing them by plugging, the stability of the expansion board can be further improved, the tilting of the expansion board can be further reduced, and the stability can be further improved.

[0010] Optionally, an arc segment is provided at one end of the plug block away from the expansion board, and the arc segment is used to pass through the plug hole.

[0011] By adopting the above technical solution and providing an arc segment, it is less likely to cause interference when the arc segment extends into the socket during installation, thereby improving the convenience of installation.

[0012] Optionally, a capacitor is fixedly arranged on one side of the circuit board away from the expansion board, a heat dissipation space is arranged on the main body corresponding to the capacitor, a radiator is also arranged in the heat dissipation space, and a plurality of heat dissipation holes are opened at positions corresponding to the capacitor on the main body.

[0013] By adopting the above technical solution, the capacitor with higher heat generation is arranged on the other side of the circuit board, which can effectively disperse the heat, thereby reducing the situation where the heat is too concentrated, further improving the stability during operation, and increasing the service life.

[0014] Optionally, a fan is also provided on the main body, and the fan corresponds to the position of the radiator and is used for exhausting air toward the outside.

[0015] By adopting the above technical solution and arranging a fan on the main body, it can dissipate heat inside the inverter, reduce internal overheating, and increase the service life of the product.

[0016] Optionally, a positioning frame is provided in the body corresponding to the capacitor, the positioning frame is provided with a through hole for the capacitor to pass through, the positioning frame is integrated with the body, and the positioning frame is also provided with a limit frame for limiting the radiator, and the limit frame abuts against the radiator.

[0017] By adopting the above technical solution, a positioning frame is set corresponding to the capacitor. Since the capacitor is large in size, setting the positioning frame can further position the capacitor, thereby reducing the situation where the capacitor is affected by shaking and further improving its service life.

[0018] Optionally, a support frame is provided on the cover shell corresponding to the control panel, and the support frame is integrated with the cover shell and is used to support the control panel. Control buttons and a digital display screen are also provided on the cover shell corresponding to the control panel, and the control buttons and the digital display screen are electrically connected to the control panel.

[0019] By adopting the above technical solution, a support frame is arranged on the cover shell, which can support the control board, reduce the contact between the control board and the circuit board, and further improve the stability.

[0020] Optionally, a support block is provided on the circuit board corresponding to the support frame, and the support block is used to abut against the support frame.

[0021] By adopting the above technical solution, a support block is arranged on the circuit board, and the support block can support the support frame, thereby further improving the stability.

[0022] Optionally, it also includes a heat sink for an external power supply, the heat sink is provided with a groove for the main body to be embedded, the main body is slidably connected in the groove, an elastic power spring is provided on the inner wall of the groove, a power slot is provided on the outer wall of the main body corresponding to the power spring, the power slot is for the power spring to extend into, the power spring is used to supply power to the main body, a cooling pipe is provided at the bottom of the heat sink, the cooling pipe is used to pass coolant, and the heat sink is also provided with a heat dissipation grille corresponding to the main body.

[0023] By adopting the above technical solution and setting a heat sink, the body can be cooled by a cooling pipe. At the same time, it is convenient to disassemble and assemble. The inverter can be powered on by embedding it as a whole, which can improve the heat dissipation effect of the body.

[0024] Optionally, one end of the cooling pipe is used to connect with a water inlet pipe, and the other end of the cooling pipe is used to connect with a water outlet pipe. A thermal expansion and contraction block is provided at one end of the cooling pipe close to the water outlet pipe, and the thermal expansion and contraction block is used to seal the cooling pipe. A spare pipe is also provided at the water outlet end of the cooling pipe of the heat sink. The spare pipe is provided on the upper side of the cooling pipe and connected with the cooling pipe. An insert block is provided on the heat sink corresponding to the spare pipe. The insert block is detachably connected to the top of the cooling pipe. A cooling block is used to be installed in the insert block, and the cooling block absorbs heat when it comes into contact with water.

[0025] By adopting the above technical solution, a spare pipe is set with a detachable connecting block in it. When the temperature on the water outlet side rises to a certain temperature, it can be judged that the cooling water temperature is difficult to achieve a cooling effect. At this time, the thermal expansion and contraction block can block the water outlet side, and the water flow will flow to the spare pipe and contact the cooling block. The cooling block absorbs a large amount of heat after meeting water and achieves the effect of timely heat dissipation and cooling, thereby reducing the situation where the inverter is damaged due to overheating.

[0026] In summary, this application has at least the following beneficial effects:

[0027] The present application solves the problem that the inverter in the prior art usually needs to be controlled by a circuit board, and the circuit board is installed in the inverter. Therefore, the inverter needs to be set according to the length and width of the circuit board. If the circuit board is too long, it will easily affect the stability of the inverter. The prior art usually adopts the method of overlapping the circuit boards for installation, but the circuit boards are still prone to instability when they shake after overlapping. The present application can reduce the situation where the expansion board squeezes the circuit board when it shakes by setting the expansion board vertically to the circuit board, thereby improving the stability of the inverter during use and increasing the service life of the product.

[0028] The present application also cools the main body by providing a heat sink, thereby reducing the possibility of damage caused by excessive internal temperature of the product, further improving the stability of use and increasing the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional diagram of the first embodiment.

[0030] Figure 2 It is a cross-sectional view of the first embodiment.

[0031] Figure 3 It is a cross-sectional view of the first embodiment.

[0032] Figure 4 It is a cross-sectional view of the second embodiment.

[0033] Figure 5 It is a cross-sectional view of the second embodiment.

[0034] Figure 6 It is a cross-sectional view of the third embodiment.

[0035] Description of reference numerals:

[0036] 1. Main body; 11. Circuit board; 111. Jack; 112. Capacitor; 12. Expansion board; 121. Plug block; 122. Arc segment; 13. Radiator; 14. Heat dissipation hole; 15. Fan; 16. Positioning frame; 17. Limiting frame; 18. Support block; 19. Power slot;

[0037] 2. Cover; 21. Control panel; 22. Support frame; 23. Control button; 24. Digital display screen;

[0038] 3. Heat sink; 31. Power spring; 32. Cooling pipe; 33. Thermal expansion and contraction block; 34. Spare pipe; 35. Mounting block; 36. Airway; 361. Gas sensor; 37. Electromagnet; 371. Spring; 372. Push plate. DETAILED DESCRIPTION

[0039] The present application is further described in detail below through specific embodiments in conjunction with the accompanying drawings. Embodiment 1

[0040] A frequency converter, such as Figure 1 and Figure 2 As shown, it includes a body 1, a circuit board 11 is arranged in the body 1, a cover 2 is also arranged on the body 1, the cover 2 is detachably connected to the body 1, the circuit board 11 is arranged on the lower side of the cover 2, and a control board 21 is arranged on the cover 2 corresponding to the circuit board 11, the control board 21 is electrically connected to the circuit board 11 and is used to control the circuit board 11. An expansion board 12 is also arranged on the circuit board 11, the expansion board 12 is arranged vertically on the circuit board 11, the expansion board 12 is electrically connected to the circuit board 11, and the expansion board 12 is fixedly connected to the circuit board 11. In a specific implementation, the expansion board 12 and the components on the expansion board 12 do not interfere with the components on the circuit board 11.

[0041] like Figure 2 and Figure 3 As shown, a socket 111 is provided on the circuit board 11, and a plug block 121 is provided on the expansion board 12 corresponding to the socket 111, and the plug blocks 121 are arranged at equal intervals along the length direction of the expansion board 12. The plug block 121 is used to be inserted into the socket 111. When the plug block 121 is inserted into the socket 111, the expansion board 12 abuts against the circuit board 11, which plays a limiting role. An arc segment is provided at one end of the plug block 121 away from the expansion board 12, and the arc segment 122 is used to pass through the socket 111. In specific implementation, after the plug block 121 is inserted into the socket 111, the expansion board 12 is fixed to the circuit board 11 by gluing, so as to further improve the stability of the expansion board 12.

[0042] like Figure 2 and Figure 3 As shown, a capacitor 112 is fixedly arranged on one side of the circuit board 11 away from the expansion board 12, a heat dissipation space is arranged in the body 1 corresponding to the capacitor 112, a heat sink 13 is also arranged in the heat dissipation space, and a plurality of heat dissipation holes 14 are opened at positions corresponding to the capacitor 112 on the body 1. In specific implementation, the heat sink 13 is made of ceramic sheets, which are arranged at intervals and have gaps, and air can dissipate heat through the gaps, thereby achieving a cooling and heat dissipation effect.

[0043] like Figure 1 and Figure 3 As shown, the body 1 is also provided with a fan 15, which corresponds to the position of the radiator 13 and is used to exhaust air toward the outside. In specific implementation, the fan 15 can draw hot air out of the body 1, and the heat is dissipated through the radiator 13 during the extraction, further improving the heat dissipation and cooling effect.

[0044] like Figure 2As shown, a positioning frame 16 is further provided in the body 1 corresponding to the capacitor 112, and a through hole is provided on the positioning frame 16 for the capacitor 112 to pass through. The positioning frame 16 is integrally provided with the body 1, and a limiting frame 17 for limiting the radiator 13 is further provided on the positioning frame 16, and the limiting frame 17 abuts against the radiator 13. In a specific implementation, the limiting frame 17 is fixedly connected to the body 1, and the limiting frame 17 is provided between the circuit board 11 and the radiator 13.

[0045] like Figure 2 and Figure 3 As shown, the cover 2 is further provided with a support frame 22 corresponding to the control board 21, and the support frame 22 is integrally provided with the cover 2, and the support frame 22 is used to support the control board 21. The cover 2 is further provided with a control button 23 and a digital display screen 24 corresponding to the control board 21, and the control button 23 and the digital display screen 24 are both electrically connected to the control board 21. A support block 18 is provided on the circuit board 11 corresponding to the support frame 22, and the support block 18 is used to abut against the support frame 22. In specific implementation, the cover 2 is further provided with a terminal, and the terminal is used to be electrically connected to the circuit to be controlled, and the inverter can be controlled through the control button 23 and the digital display screen 24, and then the circuit is processed through the terminal.

[0046] Working principle: Setting the expansion board 12 perpendicular to the circuit board 11 can improve the stability of the expansion board 12 on the circuit board 11, and at the same time can reduce the situation where the expansion board 12 loosens and other influences on the circuit board 11, thereby improving product quality and product life. Embodiment 2

[0047] like Figure 4 and Figure 5 As shown, the main difference between the second embodiment and the first embodiment is that the second embodiment further includes a heat sink 3 for an external power supply. The heat sink 3 is provided with an embedding groove for the body 1 to be embedded, and the body 1 is slidably connected in the embedding groove. An elastic power spring 31 is provided on the inner wall of the embedding groove, and a power slot 19 is provided on the outer wall of the body 1 corresponding to the power spring 31. The power slot 19 is for the power spring 31 to extend into, and the power spring 31 is used to supply power to the body 1. A cooling pipe 32 is provided at the bottom of the heat sink 3, and a coolant is passed into the cooling pipe 32. The heat sink 3 is also provided with a heat dissipation grille corresponding to the body 1. In specific implementation, when the body 1 is embedded in the heat sink 3, the power spring 31 can contact the power slot 19 to conduct electricity.

[0048] like Figure 4 and Figure 5As shown, one end of the cooling pipe 32 is used to communicate with the water inlet pipe, and the other end of the cooling pipe 32 is used to communicate with the water outlet pipe. The end of the cooling pipe 32 near the water outlet pipe is provided with a heat expansion and contraction block 33, and the heat expansion and contraction block 33 is used to block the cooling pipe 32. The end of the cooling pipe 32 of the heat sink 3 where water is discharged is also provided with a spare pipe 34, and the spare pipe 34 is arranged on the upper side of the cooling pipe 32, and the spare pipe 34 is connected with the cooling pipe 32. The heat sink 3 is provided with a mounting block 35 corresponding to the spare pipe 34, and the mounting block 35 is detachably connected to the top of the cooling pipe 32. The mounting block 35 is used to install the cooling block, and the cooling block absorbs heat after contacting with water. In specific implementation, the cooling block in this embodiment uses ammonium chloride, which can absorb a large amount of heat after contacting with water, and can have a rapid cooling effect on the body 1. In other embodiments, the cooling block can also use ammonium nitrate, which has a low cost, does not react with water but can be dissolved in water, and can also absorb heat.

[0049] Working principle: The basic principle of the second embodiment is the same as that of the first embodiment, but the second embodiment is provided with a heat sink 3 that can pass cooling water, and the main body 1 is embedded therein for cooling and power supply, which can further improve the cooling and heat dissipation effects and reduce the overheating of the main body 1. Embodiment 3

[0050] like Figure 6 As shown, the main difference between the third embodiment and the second embodiment is that the upper side of the mounting block 35 of the second embodiment is also provided with an airway 36, and a gas sensor 361 is fixedly connected in the airway 36, and the gas sensor 361 can detect the generated gas. The bottom of the heat sink 3 is also provided with an electromagnet 37, and a spring 371 is fixedly connected to the electromagnet 37. The end of the spring 371 away from the electromagnet 37 is fixedly connected to a push plate 372, and the push plate 372 has a tendency to push the body 1 away from the heat sink 3. In specific implementation, the electromagnet 37 can adsorb the push plate 372, so as not to affect the embedding of the body 1. The gas sensor 361 is electrically connected to the electromagnet 37. After the ammonium chloride is heated, the ammonium chloride can decompose to produce a small amount of ammonia. The gas sensor 361 can control the electromagnet 37 to release the push plate 372 to push the body 1 out of the heat sink 3, thereby disconnecting the power supply, so that the body 1 stops working. At the same time, when the ammonium chloride contacts water, some ammonia can also be produced, and the body 1 can also be powered off in time.

[0051] Working principle: The basic principle of embodiment 3 is the same as that of embodiment 2, but on the basis of embodiment 2, a device capable of detecting gas and exiting the main body 1 is added. When overheating occurs, it can be judged in two ways, thereby cutting off the power to cool the main body 1 and further reducing the overheating of the main body 1.

[0052] The above are preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A frequency converter, comprising a body (1), wherein a circuit board (11) is arranged in the body (1), characterized in that: The body (1) is further provided with a cover shell (2), the cover shell (2) being detachably connected to the body (1), the circuit board (11) being provided on the lower side of the cover shell (2), the cover shell (2) being provided with a control board (21) corresponding to the circuit board (11), the control board (21) being electrically connected to the circuit board (11) and used to control the circuit board (11); An expansion board (12) is also arranged on the circuit board (11); the expansion board (12) is arranged perpendicular to the circuit board (11); the expansion board (12) is electrically connected to the circuit board (11); and the expansion board (12) is fixedly connected to the circuit board (11); It also includes a heat sink (3) for an external power supply, the heat sink (3) is provided with an embedding groove for the body (1) to be embedded, the body (1) is slidably connected in the embedding groove, an elastic power spring (31) is provided on the inner wall of the embedding groove, a power groove (19) is provided on the outer wall of the body (1) corresponding to the power spring (31), the power groove (19) is for the power spring (31) to extend into, the power spring (31) is used to supply power to the body (1), a cooling pipe (32) is provided at the bottom of the heat sink (3), a cooling liquid is passed into the cooling pipe (32), and a heat sink (3) is also provided corresponding to the body (1) with a heat dissipation grille; One end of the cooling pipe (32) is used to communicate with the water inlet pipe, and the other end of the cooling pipe (32) is used to communicate with the water outlet pipe. A heat expansion and contraction block (33) is provided at one end of the cooling pipe (32) close to the water outlet pipe. The heat expansion and contraction block (33) is used to block the cooling pipe (32). A spare pipe (34) is also provided at the water outlet end of the cooling pipe (32) of the heat sink (3). The spare pipe (34) is provided on the upper side of the cooling pipe (32). The spare pipe (34) is communicated with the cooling pipe (32). A mounting block (35) is provided on the heat sink (3) corresponding to the spare pipe (34). The mounting block (35) is detachably connected to the top of the cooling pipe (32). A cooling block is installed in the mounting block (35). The cooling block adopts ammonium chloride. The cooling block absorbs heat after contacting water. An air passage (36) is also provided on the upper side of the mounting block (35), and a gas sensor (361) is fixedly connected inside the air passage (36), and the gas sensor (361) is capable of detecting the generated gas; An electromagnet (37) is also provided at the bottom of the heat sink (3), a spring (371) is fixedly connected to the electromagnet (37), and a push plate (372) is fixedly connected to one end of the spring (371) away from the electromagnet (37), and the push plate (372) has a tendency to push the body (1) to move away from the heat sink (3).

2. A frequency converter according to claim 1, characterized in that: The circuit board (11) is provided with a plug hole (111), and the expansion board (12) is provided with an insert block (121) corresponding to the plug hole (111). The insert blocks (121) are arranged at equal intervals along the length direction of the expansion board (12), and the insert blocks (121) are used to be inserted into the plug hole (111). When the insert block (121) is inserted into the plug hole (111), the expansion board (12) and the circuit board (11) are in contact.

3. A frequency converter according to claim 2, characterized in that: An arc segment (122) is provided at one end of the plug block (121) away from the expansion board (12), and the arc segment (122) is used to pass through the plug hole (111).

4. A frequency converter according to claim 2, characterized in that: A capacitor (112) is fixedly arranged on one side of the circuit board (11) away from the expansion board (12); a heat dissipation space is arranged on the body (1) corresponding to the capacitor (112); a heat sink (13) is also arranged in the heat dissipation space; and a plurality of heat dissipation holes (14) are provided at positions on the body (1) corresponding to the capacitor (112).

5. A frequency converter according to claim 4, characterized in that: The main body (1) is also provided with a fan (15), which corresponds to the position of the radiator (13) and is used to exhaust air toward the outside.

6. A frequency converter according to claim 4, characterized in that: A positioning frame (16) is also provided in the body (1) corresponding to the capacitor (112); a through hole is provided on the positioning frame (16) for the capacitor (112) to pass through; the positioning frame (16) is integrally provided with the body (1); a limiting frame (17) for limiting the radiator (13) is also provided on the positioning frame (16); the limiting frame (17) is in contact with the radiator (13).

7. A frequency converter according to claim 1, characterized in that: The cover shell (2) is further provided with a support frame (22) corresponding to the control panel (21); the support frame (22) is integrally provided with the cover shell (2); the support frame (22) is used to support the control panel (21); the cover shell (2) is further provided with a control button (23) and a digital display screen (24) corresponding to the control panel (21); the control button (23) and the digital display screen (24) are both electrically connected to the control panel (21).

8. A frequency converter according to claim 7, characterized in that: A support block (18) is provided on the circuit board (11) corresponding to the support frame (22), and the support block (18) is used to abut against the support frame (22).

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