Frequency converter and air compressor

Abstract

The invention provides a frequency converter and an air compressor, and the frequency converter comprises a case, a rectification module, an inversion module, a capacitor module, a radiator module, and an output module. The output module is provided with an output part, and the output module outputs a signal of the inversion module through the output part; the case is provided with a bottom shell; the capacitor module, the radiator module and the output part are arranged on the same side of the bottom shell and are sequentially arranged in the length direction or the width direction of the bottom shell. The heights from the sides, away from the bottom shell, of the capacitor module, the radiator module and the output part to the bottom shell are sequentially reduced. According to the technical scheme, the capacitor module, the radiator module and the output part are distributed in a three-step mode, and it is guaranteed that the gravity center of the whole machine is located at the position behind the middle and close to the capacitor module. When the frequency converter is hung on one side close to the capacitor module, the center of gravity can be concentrated on the hanging end, so that the overall stress of the frequency converter can be more stable, and the system stability of the whole machine is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of frequency converters, and in particular relates to a frequency converter and an air compressor. Background Art

[0002] The frequency converter is a power control device that uses frequency conversion technology and microelectronics technology to control the AC motor by changing the motor's operating frequency. The frequency converter is mainly composed of a rectifier module, a capacitor module, an inverter module, a brake unit, a drive unit, a detection unit, and a microprocessor unit. The rectifier module is used to convert the input three-phase power into direct current, the capacitor module is used to filter the direct current output by the rectifier module, and the inverter module is used to convert the direct current filtered by the capacitor module into alternating current. The frequency converter can be installed in a suspended manner, but due to the unreasonable position design of the components inside the existing frequency converter, the stability during suspension is low, so improvements need to be made to address this situation. Summary of the invention

[0003] Therefore, the present invention provides a frequency converter and an air compressor, which can solve the technical problem of low stability of the frequency converter during suspension installation in the prior art.

[0004] In order to solve the above problems, the present invention provides a frequency converter, which includes a chassis, a rectifier module, an inverter module, a capacitor module, a radiator module and an output module; the radiator module is used to dissipate heat for the rectifier module and the inverter module, the output module has an output part, and the output module outputs the signal of the inverter module through the output part;

[0005] The chassis has a bottom shell; the capacitor module, the radiator module and the output unit are arranged on the same side of the bottom shell, and are arranged sequentially along the length direction or the width direction of the bottom shell; wherein the heights of the capacitor module, the radiator module and the output unit from the side facing away from the bottom shell and the bottom shell decrease sequentially.

[0006] In some embodiments, the chassis has a first end, the first end is located on a side of the capacitor module away from the heat sink module, wherein the inverter is a suspended inverter, and the inverter is suspended through the first end.

[0007] In some embodiments, the output module includes three first conductive members, one end of each of the three first conductive members is electrically connected to the three phase output ends of the inverter module in a one-to-one correspondence, and the other ends of the three first conductive members each have a first wiring portion, and the three first wiring portions form the output portion.

[0008] In some embodiments, the frequency converter further includes three wiring members, the three wiring members form another output portion of the output module, and the three wiring members are detachably connected to the three first conductive members in a one-to-one correspondence.

[0009] In some embodiments, the frequency converter further includes an input module, the input module has an input part, and the rectifier module receives three-phase alternating current through the input part; the input module includes three second conductive members, one end of each of the three second conductive members is electrically connected to the three phase input ends of the rectifier module in a one-to-one correspondence, and the other ends of the three second conductive members each have a second wiring part, and the three second wiring parts can be detachably connected to an adapter, and each of the adapters has more than two sub-wiring parts;

[0010] Among them, when the input module is in the first state, the three adapters are all removed from the corresponding second wiring parts, and the three second wiring parts form the input part; when the input module is in the second state, the three adapters are all connected to the corresponding second wiring parts, and the sub-wiring parts on the three adapters form the input part.

[0011] In some embodiments, the frequency converter further includes a control module, which is used to control the working states of the capacitor module, the rectifier module and the inverter module; the frequency converter further includes a partition plate, which separates the interior of the frequency converter into a first chamber and a second chamber, and the first chamber is closer to the bottom shell relative to the second chamber; wherein the capacitor module, the rectifier module and the inverter module are arranged in the first chamber, and the control module is arranged in the second chamber;

[0012] Wherein, a through hole is provided on the partition plate, and a flip piece is provided at the through hole, and the flip piece can be flipped to a first position and a second position, so as to open the through hole in the first position so that at least a part of the components in the first chamber are exposed from the through hole; and close the through hole in the second position; at least a part of the components of the control module are arranged on the flip piece.

[0013] In some embodiments, the number of the flip members is N, where N is a positive integer greater than or equal to 2; the number of the through holes is equal to the number of the flip members and corresponds one to one;

[0014] Wherein, the components of the control module are divided into N parts and are arranged on the N flip members in a one-to-one correspondence.

[0015] In some embodiments, the capacitor module includes a support frame and a capacitor, and the capacitor is disposed on the support frame; wherein the capacitor module is installed through the support frame.

[0016] In some embodiments, the inverter has an air-cooled heat dissipation channel, and at least a portion of the radiator module (14) is located in the air-cooled heat dissipation channel; wherein the radiator module (14) is also provided with a liquid-cooled heat dissipation channel.

[0017] In some embodiments, the rectifier module, the inverter module, the capacitor module, the heat sink module and the output module are respectively and detachably arranged on different supporting members on the chassis.

[0018] The present invention also provides an air compressor, which comprises any one of the frequency converters described above.

[0019] The frequency converter and air compressor provided by the present invention have the following beneficial effects:

[0020] 1. The capacitor module, heat sink module and output part of the present invention are distributed in three steps, ensuring that the center of gravity of the whole machine is located in the middle and rear position close to the capacitor module. When the inverter is suspended using the side close to the capacitor module, the center of gravity can be concentrated on the suspension end, so that the overall force of the inverter of the present invention can be more stable, ensuring the system stability of the whole machine.

[0021] 2. The stepped layout of the capacitor module, the heat sink module and the output unit of the present invention can also separate strong and weak electricity, thereby ensuring the electrical safety of the entire system.

[0022] 3. The present invention can select single-input single-output wiring or double-input double-output wiring according to actual needs to meet the needs of different occasions.

[0023] 4. By placing the components of the control module on the flip part, the flip part can drive the components to open to expose the components in the first chamber, thereby facilitating the disassembly, assembly and replacement of the components in the first chamber, and also facilitating the observation of the internal conditions of the inverter and the wiring of the control module.

[0024] 5. Each module can be disassembled, so that each module is arranged as an independent module, which can ensure electrical safety and facilitate disassembly and assembly.

[0025] 6. The liquid cooling heat dissipation channel and the air cooling heat dissipation channel are combined to form a hybrid heat dissipation design, which can improve the heat dissipation efficiency, enhance the heat dissipation effect, and improve the stability of the heat dissipation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0027] Figure 1 This is a partial structural diagram of the frequency converter of the present invention.

[0028] Figure 2 It is a partial structural schematic diagram of another perspective of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the chassis of the present invention;

[0030] Figure 4 It is a schematic diagram of the internal structure of the frequency converter of the present invention;

[0031] Figure 5 It is a schematic diagram of the internal structure of the chassis of the present invention;

[0032] Figure 6 is a partial structural schematic diagram of the frequency converter of the present invention from another perspective;

[0033] Figure 7 is a partial structural schematic diagram of the frequency converter of the present invention from another perspective;

[0034] Figure 8 is a schematic structural diagram of a capacitor module of the present invention;

[0035] Fig. 9 is a partial structural schematic diagram of the frequency converter of the present invention from another perspective;

[0036] Fig.10 It is a partial structural schematic diagram of the frequency converter of the present invention from another perspective.

[0037] The accompanying drawings are marked as follows:

[0038] 1. Upper cover; 2. Chassis; 3. Lower cover; 4. Inlet and outlet side panels; 5. Partition plate; 6. Flip piece; 8. Guide rail; 11. Inlet and outlet module; 12. Control module; 13. Capacitor module; 14. Radiator module; 21. Terminal block support sheet metal; 22. Contactor mounting sheet metal; 23. Main control board support sheet metal; 24. Radiator support sheet metal; 25. Capacitor support sheet metal; 26. Sampling board support sheet metal; 27. Fan dust cover; 28. Copper sheet support sheet metal; 29. ​​Power supply support sheet metal; 31. Terminal block; 32. Relay; 33. Power supply; 34. Voltage sampling board; 35. Discharge resistor board; 36. Fan; 37. Switch Power board; 38, main control board; 39, indicator light; 41, contactor; 42, grounding copper sheet; 43, second conductive member; 44, first conductive member; 45, input current sensor; 46, output current sensor; 47, rectifier module; 48, inverter module; 49, busbar; 51, base; 52, support frame; 53, capacitor; 54, wiring member; 55, first chamber, 56, second chamber; 2a, support member; 5a, partition sub-board; 201, bottom shell; 20a, first end; 441, output part; 44a, first wiring part; 43a, second wiring part; 43b, adapter; 430, sub-wiring part; 501, through hole. DETAILED DESCRIPTION

[0039] 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, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. 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.

[0040] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0041] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0042] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0043] See also Figure 1-10 As shown, according to an embodiment of the present invention, a frequency converter is provided, which includes a chassis 2, a rectifier module 47, an inverter module 48, a capacitor module 13, a heat sink module 14 and an output module. Among them, the rectifier module 47 is used to convert the input three-phase power into direct current, the capacitor module 13 is used to filter the direct current output by the rectifier module 47, and the inverter module 48 is used to convert the direct current filtered by the capacitor module 13 into alternating current. The heat sink module 14 is used to dissipate heat from the rectifier module 47 and the inverter module 48. The output module has an output part 441, and the output module outputs the signal of the inverter module 48 through the output part 441.

[0044] The above-mentioned chassis 2 has a bottom shell 201, and the capacitor module 13, the heat sink module 14 and the output unit 441 are arranged on the same side of the bottom shell 201, and the three are arranged in sequence along the length direction or the width direction of the bottom shell 201. Among them, the height of the capacitor module 13, the heat sink module 14 and the output unit 441 away from the bottom shell 201 is reduced in sequence. Specifically, the height of the capacitor module 13 away from the bottom shell 201 is H1, the height of the heat sink module 14 away from the bottom shell 201 is H2, and the height of the output unit 441 away from the bottom shell 201 is H3, wherein H1 is greater than H2 and greater than H3.

[0045] In the above example, the capacitor module 13, the heat sink module 14 and the output part 441 are distributed in three steps, ensuring that the center of gravity of the whole machine is located in the middle and rear position close to the capacitor module 13. When the inverter is suspended using the side close to the capacitor module 13, the center of gravity can be concentrated on the suspension end, so that the overall force of the inverter of the present invention can be more stable, ensuring the system stability of the whole machine.

[0046] In addition, the stepped layout of the capacitor module 13, the heat sink module 14 and the output unit 441 can also separate strong and weak electricity, thereby ensuring the electrical safety of the entire system.

[0047] In a specific application example, the aforementioned rectifier module 47 may be a diode module, the aforementioned inverter module 48 may be an IGBT module, and the aforementioned heat sink module 14 may be a fin heat sink, etc.

[0048] In some embodiments, Figure 5 As shown, the chassis 2 has a first end 20a, and the first end 20a is located on a side of the capacitor module 13 away from the heat sink module 14. The frequency converter is a suspended frequency converter, and the frequency converter is suspended through the first end.

[0049] In the above example, it can be known from the above analysis that when the inverter is suspended through the first end 20a, the center of gravity can be concentrated on the suspension end, so that the overall force of the inverter of the present invention can be more stable, ensuring the system stability of the whole machine.

[0050] In some embodiments, Figure 2 As shown, the output module may include three first conductive members 44, each of which has one end electrically connected to the three phase output terminals of the inverter module 48. The other ends of the three first conductive members 44 each have a first wiring portion 44a, and the three first wiring portions 44a form the output portion 441.

[0051] In the above example, by providing three first conductive members 44 , it is helpful to export the alternating current processed by the inverter module 48 .

[0052] In some embodiments, Figure 2 and Fig. 9 As shown, the frequency converter further comprises three wiring members 54, which form another output part of the output module. The three wiring members 54 are detachably connected to the three first conductive members 44 in a one-to-one correspondence.

[0053] In the above example, when the three wiring members 54 are installed on the three first conductive members 44 in a one-to-one correspondence, the three wiring members 54 cooperate with the three first wiring parts 44a to form a double-outlet wiring, that is, two wires can be connected to each first conductive member 44. When the three wiring members 54 are removed from the three first conductive members 44, the output module can form a single-outlet wiring through the first wiring parts 44a on the three first conductive members 44, that is, one wire can be connected to each first conductive member 44. Among them, whether to install the wiring member 54 can be selected according to actual needs to achieve a single-outlet or double-outlet wiring method to meet the needs of different occasions.

[0054] In some embodiments, Figure 2 and Fig. 9 As shown, the aforementioned frequency converter may further include an input module, the input module having an input portion, and the rectifier module 47 receives three-phase AC power through the input portion of the input module. The input module includes three second conductive members 43, and one end of each of the three second conductive members 43 is electrically connected to the three phase input ends of the rectifier module 47 in a one-to-one correspondence. The other ends of the three second conductive members 43 each have a second wiring portion 43a, and the three second wiring portions 43a are all detachably connected to an adapter 43b. Each adapter 43b has more than two sub-wiring portions 430.

[0055] Among them, Figure 2 As shown, when the input module is in the first state, the three adapters 43b are all removed from the corresponding second wiring parts 43a, and the three second wiring parts 43a form the aforementioned input part. Fig. 9 As shown, when the input module is in the second state, the three adapters 43b are all connected to the corresponding second wiring parts 43a, and each sub-wiring part 430 on the three adapters 43b forms the aforementioned input part.

[0056] In the above example, when the input module is in the first state, the three adapters 43b are all removed from the corresponding second wiring parts 43a. At this time, the three second wiring parts 43a form a single-entry wiring, that is, each second wiring part 43a can be connected to a wire. When the input module is in the second state, the three adapters 43b are all connected to the corresponding second wiring parts 43a, and the sub-wiring parts 430 on each adapter 43b can cooperate to form a double-entry wiring, that is, each adapter 43b can be connected to two wires. Among them, whether to install the adapter 43b can be selected according to actual needs to achieve a single-entry or double-entry wiring method to meet the needs of different occasions.

[0057] In some embodiments, Figure 4As shown, the aforementioned input module and output module form an inlet and outlet line module 11. The input part of the aforementioned input module and the output part 441 of the output module are connected from the same side of the inverter. The input part of the aforementioned input module and the output part 441 of the output module can be distributed up and down. The aforementioned first conductive member 44 and the second conductive member 43 can both be copper sheets. The first conductive member 44 and the second conductive member 43 can be fixed to the supporting sheet metal inside the chassis 2 using a terminal. Each of the first conductive member 44 and the second conductive member 43 corresponds one by one to the coil hole position on the inlet and outlet line side plate 4.

[0058] In some embodiments, Figure 1 As shown, the aforementioned frequency converter further includes a control module 12, which is used to control the working states of the capacitor module 13, the rectifier module 47 and the inverter module 48. The frequency converter further includes a partition plate 5. The partition plate 5 separates the interior of the frequency converter into a first chamber 55 and a second chamber 56, and the first chamber 55 is closer to the bottom shell 201 relative to the second chamber 56. Among them, the capacitor module 13, the rectifier module 47 and the inverter module 48 are arranged in the first chamber 55. The control module 12 is arranged in the second chamber 56.

[0059] The partition plate 5 is provided with a through hole 501, and a flip member 6 is provided at the through hole 501. The flip member 6 can be flipped to a first position and a second position. The flip member 6 is used to open the through hole 501 when flipped to the first position, so that at least a part of the components in the first chamber 55 is exposed from the through hole 501, so as to facilitate the opening of the wiring. The flip member 6 is used to close the through hole 501 when flipped to the second position. At least a part of the components of the control module 12 are arranged on the flip member 6.

[0060] In the above example, by setting the components of the control module 12 on the flip member 6, the flip member 6 can drive the components to open to expose the components in the first chamber 55, thereby facilitating the disassembly, assembly and replacement of the components in the first chamber 55, and also facilitating the observation of the internal conditions of the inverter and the wiring of the control module 12.

[0061] like Figure 1 As shown, the first chamber 55 can be a bottom chamber, and the second chamber 56 can be an upper chamber. The capacitor module 13, the rectifier module 47 and the inverter module 48 are arranged in the first chamber 55, so that the first chamber 55 is a strong current area, and the control module 12 is arranged in the second chamber 56, so that the second chamber 56 is a weak current area. Such a layered design can separate strong and weak electricity, reduce interference, and ensure electrical safety.

[0062] In some embodiments, the number of the flip members 6 may be N, where N is a positive integer greater than or equal to 2. The components of the control module 12 are divided into N parts and are arranged one-to-one on the N flip members 6. The number of the through holes 501 is equal to the number of the flip members 6 and corresponds one-to-one.

[0063] In the above example, by setting all components of the control module 12 on the flip piece 6, it is further facilitated to connect the components by flipping, and it is further convenient to disassemble, install and replace the components in the first chamber 55, and it is also convenient to observe the internal conditions of the inverter and the wiring of the control module 12.

[0064] In a specific application example, the number of the aforementioned flip members 6 can be three, and accordingly, the components of the control module 12 are divided into three parts, and the three parts are arranged on the corresponding flip members 6 in a one-to-one correspondence. Among them, each flip member 6 can adopt a flip-type installation sheet metal design, and each flip member 6 can realize the flip function through a loose-leaf. Among them, the connection lines between the various parts of the control module 12 can be gathered through the wire groove, and the length of the wiring line is designed to avoid affecting the loose-leaf work.

[0065] like Figure 1-2 As shown, the aforementioned partition plate 5 can be composed of more than two partition sub-plates 5a, wherein each partition sub-plate 5a is provided with the aforementioned through hole 501, and the number of the aforementioned flip members 6 is equal to the number of the partition sub-plates 5a and corresponds one to one.

[0066] In some embodiments, Figure 8 As shown, the aforementioned capacitor module 13 may include a support frame 52 and a capacitor 53, and the capacitor 53 is arranged on the support frame 52. The capacitor module 13 is installed through the support frame 52. In a specific application example, the capacitor module 13 is detachably installed in the chassis 2 through the support frame 52.

[0067] In the above example, the capacitor 53 is disposed on the support frame 52 to form an independent module, which is convenient for assembly and disassembly.

[0068] The support frame 52 may be a frame formed by welding sheet metal parts. The capacitor 53 is arranged on the support frame 52 and is integrated with the support frame 52. The capacitor 53 can be disassembled as a whole during assembly and disassembly, which is more convenient and quick.

[0069] In some embodiments, Figure 8As shown, the support frame 52 has a base 51. The base 51 has an airfoil bend and is fixed to the bottom reinforcement rib of the chassis 2 by bolts. The support frame 52 is formed by bending the sheet metal multiple times, and a hanging hole is provided on it, so that the capacitor module 13 can be hung up and installed as a whole. Ventilation slots are opened on the front and back of the support frame 52, and the internal capacitor 53 can be cooled by air cooling channels. The capacitor 53 can be fixed to the support frame 52 by bolts.

[0070] In some embodiments, the inverter has an air-cooled heat dissipation channel. At least a portion of the radiator module 14 is located in the air-cooled heat dissipation channel. The radiator module 14 is also provided with a liquid-cooled heat dissipation channel. Preferably, the radiator module 14 is entirely located in the air-cooled heat dissipation channel.

[0071] In the above example, the liquid cooling heat dissipation channel cooperates with the air cooling heat dissipation channel to form a hybrid heat dissipation design, which can improve the heat dissipation efficiency, enhance the heat dissipation effect, and improve the stability of the heat dissipation system. In a specific application example, the liquid cooling heat dissipation channel can use cooling water, and the air cooling heat dissipation channel can use exhaust to remove the heat from the radiator. Among them, the liquid cooling heat dissipation channel can be used for the main heat dissipation, and the air cooling heat dissipation channel can be used for auxiliary heat dissipation.

[0072] In some embodiments, the outer layer of the aforementioned radiator module 14 may be wrapped with a sponge for protection.

[0073] In some embodiments, Figure 5 As shown, the aforementioned rectifier module 47, inverter module 48, capacitor module 13, radiator module 14 and output module are respectively detachably arranged on different support members 2a on the chassis 2 to facilitate disassembly and assembly. Preferably, the rectifier module 47, inverter module 48, capacitor module 13, radiator module 14 and output module are all detachably connected to the corresponding support members 2a by bolts to reduce the difficulty of disassembly and assembly.

[0074] In the above example, since each module is detachable, each module is arranged as an independent module, thus ensuring electrical safety.

[0075] Among them, each of the above-mentioned support members 2a can be a sheet metal part, and each support member 2a can be specially designed according to the corresponding supported module to facilitate adaptation and installation. Each support member 2a can be fixed to the inner wall of the chassis 2 by welding, reducing the components connected by fasteners on the outside of the chassis 2, making the overall structure of the box more beautiful. The position of each support member 2a is reasonably arranged to avoid interference during installation and disassembly.

[0076] In some embodiments, the aforementioned control module 12 has a terminal row module. The aforementioned partition includes a first partition, the aforementioned flip member 6 includes a first flip member arranged on the first partition, and the terminal row module is arranged on the first flip member 6. The aforementioned support member 2a includes a terminal row support sheet metal 21, and the terminal row support sheet metal 21 is divided into two left and right pieces to provide support for the first partition. The shape of the terminal row support sheet metal 21 is relatively large, and a long hole is opened in the middle to avoid the installation of the grounding copper sheet 42. Among them, the terminal row module may include a terminal row 31 and a relay 32. The terminal row 31 is used to connect the wires and play a switching role. The relay 32 is used to control the on and off of the circuit. A guide rail 8 may be provided on the first flip member, and the guide rail 8 can be connected to the first flip member by self-tapping screws, and the terminal row 31 and the relay 32 can both be installed on the guide rail 8.

[0077] A contactor mounting sheet metal 22 is provided on the inner wall of the aforementioned chassis 2, and the contactor mounting sheet metal 22 is used to provide support for the contactor 41. The contactor 41 is fixed to the contactor mounting sheet metal 22 by bolts. Among them, the contactor mounting sheet metal 22 is an inverted box shape, which is fixed by fasteners on the outside of the chassis 2. The control module 12 has a main control board 38. The aforementioned partition includes a second partition, and the aforementioned flip member 6 includes a second flip member arranged on the second partition, and the main control board 38 can be arranged on the second flip member by bolts. The shape of the support sheet metal of the main control board 38 is different from others, and it has a bend on it for fixing the second flip member. The aforementioned support member 2a includes a radiator support sheet metal 24 and a capacitor support sheet metal 25. The radiator support sheet metal 24 is used to provide support for the radiator module 14, and the capacitor support sheet metal 25 is used to provide support for the capacitor module 13. The aforementioned control module 12 includes a voltage sampling board 34, and the voltage sampling board 34 is used to collect voltage information and return it to the main control board 38. The aforementioned support member 2a includes a sampling plate support sheet metal 26 for providing support for the voltage sampling plate 34. Among them, the shapes of the radiator support sheet metal 24, the capacitor support sheet metal 25 and the sampling plate support sheet metal 26 are basically the same, and all are "L"-shaped bent sheet metals, and are fixed to the inner wall of the chassis 2 by welding. The control module 12 also includes a discharge resistor board 35 and a switch power supply board 37. The discharge resistor board 35 is used to release the main circuit voltage quickly when shutting down, which plays a safety protection role. The switch power supply board 37 supplies power to the main control board 38, and the main control board 38 collects various feedback signals, adjusts the overall operation, and controls the variable frequency power and output power.

[0078] The chassis 2 is also provided with a fan dust cover 27, which is a boss-shaped bent sheet metal and is fixedly connected to the chassis 2 by bolts. The chassis 2 is also provided with a copper sheet support sheet metal 28, on which a terminal is installed, and the copper sheet support sheet metal 28 is connected and fixed to the grounding copper sheet 42, the input copper sheet (i.e., the aforementioned second conductive member 43) and the output copper sheet (i.e., the aforementioned first conductive member 44) through the terminal. The output copper sheet is "Z"-shaped, and the output copper sheet crosses the diode module (i.e., the aforementioned rectifier module 47) and is electrically connected to the IGBT module (i.e., the aforementioned inverter module 48), wherein the output copper sheet is connected to the IGBT module by bolts.

[0079] The input current sensor 45 is connected and fixed to the input copper sheet by screws, and the output current sensor 46 is connected and fixed to the output copper sheet by screws. The corresponding holes on the input copper sheet and the output copper sheet are provided with internal threads for screw installation. The diode module (i.e. the aforementioned rectifier module 47) and the IGBT module (i.e. the aforementioned inverter module 48) are installed on the radiator module 14 by bolt assemblies. The busbar 49 is designed in a special shape, and one end thereof is connected to the IGBT module by a pin. The surface of the busbar 49 is designed with a convex mold, and is connected to the capacitor module 13 by a bolt assembly.

[0080] The chassis 2 is also provided with a power supply support sheet metal 29, which is a box-shaped bent sheet metal, and the side wall is welded to the inner wall of the chassis 2. The power supply 33 can be connected to the power supply support sheet metal 29 by self-tapping screws, and the power supply 33 is located above the aforementioned guide rail 8. The voltage sampling board 34, the discharge resistor board 35 and the switch power supply board 37 are all connected and fixed with the rivet nuts on the corresponding mounting sheet metal by bolts. There are three fans 36 in total, which are arranged in a horizontal array in sequence, and are all connected to the corresponding mounting sheet metal by bolts. The indicator light 39 is installed on the reserved hole of the support sheet metal and is tightened and fixed by the fixing ring provided by the indicator light 39.

[0081] In some embodiments, Figure 3-4 As shown, the aforementioned chassis 2 can be rectangular as a whole, with a volume size of approximately 1000mm×650mm×400mm. The chassis 2 can be an integrated sheet metal structure. The chassis 2 has a shell, an upper cover plate 1, a lower cover plate 3 and an inlet and outlet line side plate 4. The upper left corner of the upper cover plate 1 is processed with a silk screen. A molding hole is opened on the right side of the surface of the lower cover plate 3 for the indicator light 39 to pass through, and is provided with different silk screens. The inlet and outlet line side plate 4 has a hole for convenient installation of the coil. The upper cover plate 1, the lower cover plate 3 and the inlet and outlet line side plate 4 are all fixedly connected to the shell by bolts. Among them, threaded fasteners are rarely used on the surface of the shell, which ensures the overall installation convenience and beauty.

[0082] The present invention also provides an air compressor, which may include any of the above-mentioned inverters. Among them, because the air compressor adopts the above-mentioned inverter, the capacitor module 13, the heat sink module 14 and the output part 441 are distributed in three steps, ensuring that the center of gravity of the whole machine is located in the middle and rear position close to the capacitor module 13. When the inverter is suspended using the side close to the capacitor module 13, the center of gravity can be concentrated on the suspension end, so that the overall force of the inverter of the present invention can be more stable, ensuring the system stability of the whole machine.

[0083] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A frequency converter, characterized in that: The invention comprises a chassis (2), a rectifier module (47), an inverter module (48), a capacitor module (13), a heat sink module (14) and an output module; the heat sink module (14) is used to dissipate heat from the rectifier module (47) and the inverter module (48); the output module has an output portion (441); and the output module outputs a signal of the inverter module (48) through the output portion (441); The chassis (2) comprises a bottom shell (201); the capacitor module (13), the heat sink module (14) and the output portion (441) are arranged on the same side of the bottom shell (201), and are arranged in sequence along the length direction or the width direction of the bottom shell (201); wherein the height of the capacitor module (13), the heat sink module (14) and the output portion (441) from the bottom shell (201) decreases in sequence on the side facing away from the bottom shell (201).

2. The frequency converter according to claim 1, characterized in that: The chassis (2) has a first end (20a), the first end (20a) being located on a side of the capacitor module (13) facing away from the radiator module (14), wherein the inverter is a suspended inverter, and the inverter is suspended via the first end (20a).

3. The frequency converter according to claim 1, characterized in that: The output module comprises three first conductive members (44), one end of each of the three first conductive members (44) being electrically connected to three phase output ends of the inverter module (48) in a one-to-one correspondence, the other end of each of the three first conductive members (44) having a first wiring portion (44a), and the three first wiring portions (44a) forming the output portion (441).

4. The frequency converter according to claim 3, characterized in that: The frequency converter further comprises three wiring members (54), the three wiring members (54) forming another output portion of the output module, and the three wiring members (54) are detachably connected to the three first conductive members (44) in a one-to-one correspondence.

5. The frequency converter according to any one of claims 1 to 4, characterized in that: It also includes an input module, the input module having an input portion, the rectifier module (47) receiving three-phase alternating current through the input portion; the input module includes three second conductive members (43), one end of each of the three second conductive members (43) being electrically connected to the three phase input ends of the rectifier module (47) in a one-to-one correspondence, the other end of each of the three second conductive members (43) having a second wiring portion (43a), each of the three second wiring portions (43a) being detachably connected to an adapter (43b), each of the adapters (43b) having more than two sub-wiring portions (430); Wherein, when the input module is in the first state, the three adapters (43b) are all detached from the corresponding second wiring parts (43a), and the three second wiring parts (43a) form the input part; when the input module is in the second state, the three adapters (43b) are all connected to the corresponding second wiring parts (43a), and the sub-wiring parts (430) on the three adapters (43b) form the input part.

6. The frequency converter according to any one of claims 1 to 4, characterized in that: The inverter further comprises a control module (12), the control module (12) being used to control the working states of the capacitor module (13), the rectifier module (47) and the inverter module (48); the inverter further comprises a partition plate (5), the partition plate (5) separating the interior of the inverter into a first chamber (55) and a second chamber (56), the first chamber (55) being closer to the bottom shell (201) relative to the second chamber (56); wherein the capacitor module (13), the rectifier module (47) and the inverter module (48) are arranged in the first chamber (55), and the control module (12) is arranged in the second chamber (56); The partition plate (5) is provided with a through hole (501), and a flip member (6) is provided at the through hole (501). The flip member (6) can be flipped to a first position and a second position, so as to open the through hole (501) in the first position so that at least a part of the components in the first chamber are exposed from the through hole (501); and close the through hole (501) in the second position; at least a part of the components of the control module (12) are arranged on the flip member (6).

7. The frequency converter according to claim 6, characterized in that: The number of the flip members (6) is N, where N is a positive integer greater than or equal to 2; the number of the through holes (501) is equal to the number of the flip members (6), and they correspond one to one; Wherein, each component of the control module (12) is divided into N parts and is arranged on the N flip members (6) in a one-to-one correspondence.

8. The frequency converter according to any one of claims 1 to 4 and 7, characterized in that: The capacitor module (13) comprises a support frame (52) and a capacitor (53), wherein the capacitor (53) is arranged on the support frame (52); wherein the capacitor module (13) is installed via the support frame (52).

9. The frequency converter according to any one of claims 1 to 4 and 7, characterized in that: The frequency converter has an air-cooling heat dissipation flow channel, and at least a portion of the radiator module (14) is located in the air-cooling heat dissipation flow channel; wherein the radiator module (14) is also provided with a liquid-cooling heat dissipation flow channel.

10. The frequency converter according to any one of claims 1 to 4 and 7, characterized in that: The rectifier module (47), the inverter module (48), the capacitor module (13), the heat sink module (14) and the output module are respectively detachably arranged on different support members (2a) on the chassis (2).

11. An air compressor, characterized in that: The invention comprises the frequency converter according to any one of claims 1 to 10.

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