Frequency converter and air compressor

Abstract

The utility model 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 of the utility model, the capacitor module, the radiator module and the output part are distributed in a three-step manner, so that the gravity center of the whole machine is ensured to be positioned at a position behind the middle part and close to the capacitor module. When the frequency converter is hung at one side close to the capacitor module, the center of gravity can be concentrated at 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 ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of frequency converter, specifically relates to a frequency converter and air compressor. BACKGROUND

[0002] The frequency converter is the power control equipment of application frequency conversion technology and microelectronic technology, changes motor working frequency to control the electric power control device of alternating current motor. Frequency converter mainly comprises rectifier module, capacitor module, inverter module, brake unit, drive unit, detection unit and micro processing unit etc., wherein, rectifier module is used for converting input three-phase electricity into direct current, capacitor module is used for filtering the direct current of rectifier module output, inverter module is used for converting the direct current after capacitor module filtering into alternating current. Among them, the frequency converter can adopt the way of suspension installation, but due to the unreasonable position design of the internal components of the existing frequency converter, the stability of suspension is low, so it is necessary to improve this situation. UTILITY MODEL CONTENTS

[0003] Therefore, the utility model provides a kind of frequency converter and air compressor, can solve the technical problem of low stability of frequency converter in prior art when suspension installation.

[0004] To solve the above problems, the utility model provides a kind of frequency converter, it includes case, rectifier module, inverter module, capacitor module, radiator module and output module;The radiator module is used for the heat dissipation of the rectifier module and the inverter module, and the output module has an output part, and the output module outputs the signal of the inverter module through the output part;

[0005] The case has bottom shell;The capacitor module, the radiator module and the output part are arranged on the same side of the bottom shell, and the three are sequentially arranged along the length direction or the width direction of the bottom shell;Wherein, the height between the side of the capacitor module, the radiator module and the output part away from the bottom shell and the bottom shell decreases in turn.

[0006] In some embodiments, the case has a first end, and the first end is located on the side of the capacitor module away from the radiator module, wherein the frequency converter is a suspension type frequency converter, and the frequency converter is suspended through the first end.

[0007] In some embodiments, the output module includes three first conductive parts, one end of each of the three first conductive parts is electrically connected to one of the three phase output terminals of the inverter module, and the other end of each of the three first conductive parts has a first wiring part, and the three first wiring parts form the output part.

[0008] In some embodiments, the frequency converter further comprises three connecting pieces, the three connecting pieces form another output part of the output module, and the three connecting pieces are detachably connected with the three first conductive pieces one by one.

[0009] In some embodiments, the frequency converter further comprises 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 comprises three second conductive pieces, one end of each of the three second conductive pieces is electrically connected with the three-phase input end of the rectifier module one by one, and the other end of each of the three second conductive pieces has a second connecting part, each of the three second connecting parts is detachably connected with an adapter, and each of the adapters has two or more sub-connecting parts.

[0010] In the first state, the three adapters are detached from the corresponding second connecting parts, and the three second connecting parts form the input part; in the second state, the three adapters are connected to the corresponding second connecting parts, and each of the sub-connecting parts on the three adapters forms the input part.

[0011] In some embodiments, the frequency converter further comprises a control module, the control module is used for controlling the working state of each of the capacitor module, the rectifier module and the inverter module; the frequency converter further comprises a partition plate, the partition plate divides the inside of the frequency converter into a first chamber and a second chamber, and the first chamber is closer to the bottom shell than 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] In some embodiments, the control module comprises a plurality of components, and the plurality of components are arranged on the plurality of flip pieces one by one.

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

[0014] In some embodiments, each component of the control module is divided into N parts and arranged on the N flip pieces one by one.

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

[0016] In some embodiments, the frequency converter has a wind-cooled heat dissipation flow channel, and at least a part of the heat dissipation module (14) is located in the wind-cooled heat dissipation flow channel; wherein the heat dissipation module (14) is further provided with a liquid-cooled heat dissipation flow channel.

[0017] In some embodiments, the rectifier module, the inverter module, the capacitor module, the heat dissipation module and the output module are respectively detachably arranged on different supports of the cabinet.

[0018] The utility model also provides a kind of air compressor, it includes the frequency converter of any one of the above.

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

[0020] 1, the capacitor module, heat dissipation module and output of the utility model are distributed in three levels, to ensure that the gravity center of the whole machine is located in the middle part, close to the position of capacitor module. When the frequency converter uses the side close to the capacitor module to be hung, the gravity center can be concentrated on the hanging end, so that the stress of the whole frequency converter can be more stable, and the system stability of the whole machine is guaranteed.

[0021] 2, the stepped layout of the capacitor module, heat dissipation module and output of the utility model can also separate strong and weak electricity, to guarantee the electrical safety of the whole machine system.

[0022] 3, the utility model can select single-in single-out wiring or double-in double-out wiring according to actual demand, to meet the needs of different occasions.

[0023] 4, by setting the components of control module on the turnover piece, the turnover piece can drive the components to open, to expose the components of the first chamber, facilitate the disassembly and replacement of components in the first chamber, and also facilitate the observation of internal conditions of the frequency converter and the wiring of control module.

[0024] 5, each module can be detached, so that each module is an independent module arrangement, so as to guarantee electrical safety and facilitate disassembly.

[0025] 6, liquid-cooled heat dissipation flow channel cooperates with wind-cooled heat dissipation flow channel to form a hybrid heat dissipation design, which can improve heat dissipation efficiency, enhance heat dissipation effect and improve heat dissipation system stability. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the accompanying drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced. The accompanying drawings in the following description are merely exemplary, and for those skilled in the art, other embodiments can be derived from the provided drawings without creative labor.

[0027] Figure 1 is a partial structure schematic diagram of the frequency converter of the present application

[0028] Figure 2 is a partial structure schematic diagram of the frequency converter of the present application from another perspective;

[0029] Figure 3 is a structure schematic diagram of the case of the present application;

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

[0031] Figure 5 is a internal structure schematic diagram of the case of the present application;

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

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

[0034] Figure 8 is a structure schematic diagram of the capacitor module of the present application;

[0035] Figure 9 is a partial structure schematic diagram of the frequency converter of the present application from another perspective;

[0036] Figure 10 is a partial structure schematic diagram of the frequency converter of the present application from another perspective.

[0037] The reference signs are:

[0038] 1, upper cover plate; 2, case; 3, lower cover plate; 4, access line side plate; 5, partition plate; 6, turnover piece; 8, guide rail; 11, access line module; 12, control module; 13, capacitor module; 14, radiator module; 21, terminal row support sheet metal; 22, contactor mounting plate metal; 23, main control board support plate metal; 24, radiator support sheet metal; 25, capacitor support plate metal; 26, sampling plate support plate metal; 27, fan dust cover; 28, copper sheet support sheet metal; 29, power supply support sheet metal; 31, terminal row; 32, relay; 33, power supply; 34, voltage sampling plate; 35, discharge resistance plate; 36, fan; 37, switching power supply plate; 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-plate; 201, bottom shell; 20a, first end; 441, output portion; 44a, first wiring portion; 43a, second wiring portion; 43b, adapter; 430, sub-wiring portion; 501, through hole. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0040] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and in the absence of the opposite description, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0041] For purposes of the description hereinafter, spatially relative terms, such as "above", "below", "up", "down", "between", "within", "left", "right", "rear", "front", "upper", "lower", "horizontal", "vertical", "above", "below", "top", "bottom", "under", and the like, can be used for ease of description to describe one element's or feature's spatial position or relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device in the figures is inverted, elements described as "above" or "up" other elements or features would then be oriented "below" or "down" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. The terms "first", "second", "third", etc. are used herein to describe various elements, components, regions and / or sections. These terms are used merely to distinguish one element, component, region and / or section from another element, component, region and / or section, and do not have any special meaning or function unless otherwise stated. Thus, these terms are not intended to limit the scope of the present disclosure.

[0042] In addition, it should be noted that the use of the terms "first", "second", etc. to describe various components is merely intended to differentiate one component from another, and does not have any special meaning or function unless otherwise stated. Thus, these terms should not be interpreted as limiting the scope of the present disclosure.

[0043] With reference to Figures 1-10 As shown in the drawings, according to the embodiments of the present application, a frequency converter is provided, which comprises a cabinet 2, a rectifier module 47, an inverter module 48, a capacitor module 13, a radiator module 14 and an output module. The rectifier module 47 is used to convert input three-phase power into direct current. The capacitor module 13 is used to filter the direct current output by the rectifier module 47. The inverter module 48 is used to convert the direct current filtered by the capacitor module 13 into alternating current. The radiator 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 the signal of the inverter module 48 through the output portion 441.

[0044] The cabinet 2 has a bottom shell 201. The capacitor module 13, the radiator 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. The height from the side of the capacitor module 13, the radiator module 14 and the output portion 441 away from the bottom shell 201 to the bottom shell 201 decreases in sequence. Specifically, the height from the side of the capacitor module 13 away from the bottom shell 201 to the bottom shell 201 is H1, the height from the side of the radiator module 14 away from the bottom shell 201 to the bottom shell 201 is H2, and the height from the side of the output portion 441 away from the bottom shell 201 to the bottom shell 201 is H3, wherein H1 is greater than H2, and H2 is greater than H3.

[0045] In the above example, the capacitor module 13, the radiator module 14 and the output portion 441 are in a three-level stepped distribution, which ensures that the gravity center of the whole machine is located at the middle part close to the capacitor module 13. When the frequency converter is suspended by the side close to the capacitor module 13, the gravity center can be concentrated at the suspension end, so that the stress of the whole frequency converter of the utility model can be more stable, and the system stability of the whole machine is ensured.

[0046] In addition, the stepped layout of the capacitor module 13, the radiator module 14 and the output portion 441 can also separate strong and weak electricity, and ensure the electrical safety of the whole machine system.

[0047] In a specific application example, the aforementioned rectifier module 47 can be a diode module, the aforementioned inverter module 48 can be an IGBT module, and the aforementioned radiator module 14 can be a fin radiator and the like.

[0048] In some embodiments, as shown in Figure 5 The cabinet 2 has a first end 20a located on the side of the capacitor module 13 away from the radiator module 14. The frequency converter is a suspended frequency converter, and the frequency converter is suspended by the first end.

[0049] In the above example, through the above analysis, when the frequency converter is suspended by the first end 20a, the gravity center can be concentrated at the suspension end, so that the stress of the whole frequency converter of the utility model can be more stable, and the system stability of the whole machine is ensured.

[0050] In some embodiments, as shown in Figure 2 The aforementioned output module can include three first conductive parts 44, one end of each of the three first conductive parts 44 is electrically connected with the three phase output ends of the inverter module 48 one by one. The other end of the three first conductive parts 44 has a first wiring portion 44a, and the three first wiring portions 44a form the aforementioned output portion 441.

[0051] In the above example, by arranging the three first conductive parts 44, the alternating current processed by the inverter module 48 can be led out.

[0052] In some embodiments, as shown in Figure 2 and Figure 9 The aforementioned frequency converter further includes three wiring parts 54, which form another output portion of the output module. The three wiring parts 54 are detachably connected with the aforementioned three first conductive parts 44 one by one.

[0053] In the above example, when the three connecting pieces 54 are installed on the three first conductive pieces 44 one by one, the three connecting pieces 54 cooperate with the aforementioned three first connecting portions 44a to form double-out connecting, that is, two wires can be connected out of each first conductive piece 44. When the three connecting pieces 54 are removed from the three first conductive pieces 44, the output module can form single-out connecting through the first connecting portions 44a on the three first conductive pieces 44, that is, one wire can be connected out of each first conductive piece 44. Among them, whether to install the connecting piece 54 can be selected according to actual needs to realize single-out or double-out connecting mode to meet the needs of different occasions.

[0054] In some embodiments, as shown in Figure 2 and Figure 9 The aforementioned frequency converter can also include an input module, and the input module has an input portion, and the rectifier module 47 receives three-phase alternating current through the input portion of the input module. The input module includes three second conductive pieces 43, one end of each of the three second conductive pieces 43 is electrically connected to the three-phase input end of the rectifier module 47 one by one. The other end of each of the three second conductive pieces 43 has a second connecting portion 43a, and each of the three second connecting portions 43a is detachably connected to an adapter 43b. Each adapter 43b has two or more sub-connecting portions 430.

[0055] Among them, as shown in Figure 2 When the input module is in the first state, the three adapters 43b are all detached from the corresponding second connecting portions 43a, and the three second connecting portions 43a form the aforementioned input portion. As shown in Figure 9 When the input module is in the second state, the three adapters 43b are all connected to the corresponding second connecting portions 43a, and each sub-connecting portion 430 on the three adapters 43b forms the aforementioned input portion.

[0056] In the above example, when the input module is in the first state, the three adapters 43b are all detached from the corresponding second connecting portions 43a, and at this time the three second connecting portions 43a form single-in connecting, that is, one wire can be connected into each second connecting portion 43a. When the input module is in the second state, the three adapters 43b are all connected to the corresponding second connecting portions 43a, and the sub-connecting portions 430 on each adapter 43b cooperate to form double-in connecting, that is, two wires can be connected into each adapter 43b. Among them, whether to install the adapter 43b can be selected according to actual needs to realize single-in or double-in connecting mode to meet the needs of different occasions.

[0057] In some embodiments, as shown in Figure 4As shown, the input module and the output module form the access line module 11. The input part of the input module and the output part 441 of the output module are wired from the same side of the frequency converter. The input part of the input module and the output part 441 of the output module can be distributed vertically. The 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 support sheet metal inside the cabinet 2 by using the terminal post. Each of the first conductive member 44 and the second conductive member 43 corresponds to the wire loop hole on the access line side plate 4.

[0058] In some embodiments, as shown, Figure 1 As shown, the frequency converter further comprises a control module 12, which is used to control the working state of each of the capacitor module 13, the rectifier module 47 and the inverter module 48. The frequency converter further comprises a partition plate 5. The partition plate 5 divides 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 than 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] Among them, the partition plate 5 is provided with a through hole 501, and the through hole 501 is provided with a turnover member 6. The turnover member 6 can be turned to a first position and a second position. The turnover member 6 is used to open the through hole 501 when turned to the first position, so that at least part of the components in the first chamber 55 are exposed from the through hole 501, to facilitate the opening of the wire. The turnover member 6 is used to close the through hole 501 when turned to the second position. At least part of the components of the control module 12 are arranged on the turnover member 6.

[0060] In the above example, by arranging the components of the control module 12 on the turnover member 6, the turnover member 6 can drive the components to open to expose the components of the first chamber 55, facilitating the disassembly and replacement of the components in the first chamber 55, and also facilitating the observation of the internal situation of the frequency converter and the wiring of the control module 12.

[0061] As shown, Figure 1 As shown, the first chamber 55 can be a bottom chamber, and the second chamber 56 is an upper chamber. Among them, by arranging the capacitor module 13, the rectifier module 47 and the inverter module 48 in the first chamber 55, 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 layered design can separate strong and weak current, reduce interference and ensure electrical safety.

[0062] In some embodiments, the number of the aforementioned turnover pieces 6 can be N, N being 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 turnover pieces 6. The number of the aforementioned through holes 501 is equal to the number of the turnover pieces 6 and is one-to-one corresponding.

[0063] In the aforementioned example, by arranging the components of the control module 12 on the turnover pieces 6, it is further beneficial to make wiring by turnover, and it is further convenient to disassemble and replace the components in the first chamber 55, and it is also convenient to observe the internal situation of the frequency converter and the wiring of the control module 12.

[0064] In a specific application example, the number of the aforementioned turnover pieces 6 can be three, and correspondingly, the components of the control module 12 are divided into three parts, which are arranged one-to-one on the corresponding turnover pieces 6. Each of the turnover pieces 6 can be designed as a flip type mounting sheet metal, and each of the turnover pieces 6 can realize the turnover function through a hinge. The connection lines between the parts of the control module 12 can be gathered through a wire slot, and the wire length is designed to avoid affecting the hinge work.

[0065] As shown in Figures 1-2 The aforementioned partition plate 5 can be composed of two or more partition sub-plates 5a, wherein each partition sub-plate 5a is provided with the aforementioned through hole 501, and the number of the aforementioned turnover pieces 6 is equal to the number of the partition sub-plates 5a and is one-to-one corresponding.

[0066] In some embodiments, as shown in Figure 8 The aforementioned capacitor module 13 can 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 cabinet 2 through the support frame 52.

[0067] In the aforementioned example, by arranging the capacitor 53 on the support frame 52, an independent module is formed, which is beneficial to disassembly.

[0068] The aforementioned support frame 52 can be a frame composed of sheet metal parts, and the capacitor 53 is arranged on the support frame 52 and constitutes a whole with the support frame 52, which is more convenient and fast to disassemble.

[0069] In some embodiments, as shown in Figure 8As shown, the support frame 52 has a base 51. The base 51 has a wing-shaped bend, which is fixed to the bottom reinforcing rib of the cabinet 2 by bolts. The support frame 52 is formed by multiple bends of sheet metal parts, and is provided with a hanging hole for facilitating the overall lifting and installation of the capacitor module 13. The support frame 52 is provided with ventilation grooves on the front and rear surfaces, and the internal capacitors 53 can be cooled by air cooling heat dissipation channels. The capacitors 53 can be fixed to the support frame 52 by bolts.

[0070] In some embodiments, the aforementioned frequency converter has an air-cooled heat dissipation channel. At least a part of the heat sink module 14 is located in the air-cooled heat dissipation channel. The heat sink module 14 is further provided with a liquid-cooled heat dissipation channel. Preferably, the heat sink module 14 is entirely located in the air-cooled heat dissipation channel.

[0071] In the above example, the liquid-cooled heat dissipation channel cooperates with the air-cooled 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-cooled heat dissipation channel can use cooling water, and the air-cooled heat dissipation channel can use air suction to remove the heat of the heat sink. The liquid-cooled heat dissipation channel can be the main heat dissipation, and the air-cooled heat dissipation channel can be the auxiliary heat dissipation.

[0072] In some embodiments, the outer layer of the aforementioned heat sink module 14 can be wrapped with a sponge, which has a protective effect.

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

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

[0075] In the above example, since each module is detachable, each module is arranged as an independent module, which can ensure electrical safety.

[0076] In some embodiments, the aforementioned control module 12 has a terminal strip module. The aforementioned partition includes a first partition, the aforementioned turnover piece 6 includes a first turnover piece arranged on the first partition, and the terminal strip module is arranged on the first turnover piece 6. The aforementioned support piece 2a includes a terminal strip support panel 21 which is divided into left and right two pieces to provide support for the first partition. The terminal strip support panel 21 is large in shape and has a long hole in the middle to avoid the installation of the grounding copper sheet 42. The terminal strip module can include a terminal strip 31 and a relay 32. The terminal strip 31 is used to connect the wire and serves as a relay. The relay 32 is used to control the on-off of the circuit. The first turnover piece can be provided with a guide rail 8 which can be connected with the first turnover piece by self-tapping screws, and the terminal strip 31 and the relay 32 can be installed on the guide rail 8.

[0077] The aforementioned inner wall of the case 2 is provided with a contactor mounting panel 22 which is used to provide support for the contactor 41. The contactor 41 is fixed on the contactor mounting panel 22 by bolts. The contactor mounting panel 22 is a box-shaped reverse buckle which is fixed by fasteners on the outside of the case 2. The control module 12 has a main control board 38. The aforementioned partition includes a second partition, the aforementioned turnover piece 6 includes a second turnover piece arranged on the second partition, and the main control board 38 can be arranged on the second turnover piece by bolts. The main control board 38 support panel is different in shape from others, and has a bend on it for fixing the second turnover piece. The aforementioned support piece 2a includes a radiator support panel 24 and a capacitor support panel 25. The radiator support panel 24 is used to provide support for the radiator module 14, and the capacitor support panel 25 is used to provide support for the capacitor module 13. The aforementioned control module 12 includes a voltage sampling board 34 which is used to collect voltage information and return to the main control board 38. The aforementioned support piece 2a includes a sampling board support panel 26 which is used to provide support for the voltage sampling board 34. The shapes of the radiator support panel 24, the capacitor support panel 25 and the sampling board support panel 26 are basically the same, and they are all "L" type bent panels which are fixed on the inner wall of the case 2 by welding. The control module 12 also includes a discharge resistance board 35 and a switching power supply board 37. The discharge resistance board 35 is used to quickly release the main circuit voltage when the machine is shut down, and plays a safety protection role. The switching power supply board 37 supplies power to the main control board 38, and the main control board 38 collects various feedback signals to adjust the overall operation and control the variable frequency power and output power.

[0078] The cabinet 2 is further provided with a fan dust cover 27, which is a boss type bent sheet metal and is fixedly connected with the cabinet 2 by bolts. The cabinet 2 is further provided with a copper sheet support sheet metal 28, which is provided with a terminal post. The copper sheet support sheet metal 28 is fixedly connected with the grounding copper sheet 42, the input copper sheet (i.e. the second conductive member 43) and the output copper sheet (i.e. the first conductive member 44) through the terminal post. The output copper sheet is in a "Z" shape, and the output copper sheet is electrically connected with the diode module (i.e. the rectifier module 47) and the IGBT module (i.e. the inverter module 48) across the diode module and the IGBT module, and the output copper sheet is connected with the IGBT module by bolts.

[0079] The input current sensor 45 is fixedly connected with the input copper sheet by screws, and the output current sensor 46 is fixedly connected with the output copper sheet by screws. The input copper sheet and the output copper sheet are provided with internal threads for screw installation at corresponding hole positions. The diode module (i.e. the rectifier module 47) and the IGBT module (i.e. the inverter module 48) are installed on the heat sink module 14 by bolt assemblies. The busbar 49 is specially shaped, and one end of the busbar 49 is connected with the IGBT module by a pin. The busbar 49 is designed with a convex mold, and is connected with the capacitor module 13 by a bolt assembly.

[0080] The cabinet 2 is further 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 cabinet 2. The power supply 33 can be connected with the power supply support sheet metal 29 by self-tapping nails, and the power supply 33 is located above the aforementioned guide rail 8. The voltage sampling board 34, the discharge resistance board 35 and the switching power supply board 37 are fixedly connected with the press-in nuts on the corresponding installation sheet metal by bolts. The fan 36 is three in total, which are arranged in a horizontal array, and are connected with the corresponding installation sheet metal by bolts. The indicator light 39 is installed on the support sheet metal reserved hole position and is fixedly screwed by the fixing ring of the indicator light 39.

[0081] In some embodiments, as shown in FIG. 1, Figures 3-4 The cabinet 2 can be an integrated sheet metal structure. The cabinet 2 has a shell, an upper cover plate 1, a lower cover plate 3 and an access line side plate 4. The upper cover plate 1 is provided with a silk screen at the upper left corner. The lower cover plate 3 is provided with a shaped hole on the right side of the surface for light transmission of the indicator light 39, and is provided with different silk screens. The access line side plate 4 is provided with a hole for conveniently installing a wire loop. The upper cover plate 1, the lower cover plate 3 and the access line side plate 4 are fixedly connected with the shell by bolts. Among them, the shell surface rarely uses threaded fasteners, which ensures the overall installation convenience and beauty.

[0082] The utility model also provides a kind of air compressor, it can include the frequency converter of any one of above-mentioned. Among them, since air compressor adopts the frequency converter described above, capacitor module 13, radiator module 14 and output 441 three are three-step ladder distribution, ensure that the gravity center of complete machine is located in the position of middle part rear close to capacitor module 13. When frequency converter uses the side close to capacitor module 13 to carry out suspension, can make gravity center be able to concentrate in suspension end, to make the stress of the utility model frequency converter whole can be more stable, guarantee the system stability of complete machine.

[0083] Those skilled in the art will readily understand that the advantageous technical features of the above-mentioned modes can be freely combined and superimposed without conflict.

[0084] The above is only the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model. The above is only the preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled person in the art, without departing from the technical principle of the utility model, a number of improvements and modifications can be made, and these improvements and modifications should be regarded as the protection scope of the utility model.

Claims

1. A frequency converter, characterized by: The frequency converter comprises a cabinet (2), a rectifier module (47), an inverter module (48), a capacitor module (13), a radiator module (14) and an output module; the radiator module (14) is used for radiating the rectifier module (47) and the inverter module (48), and the output module has an output part (441) through which the signal of the inverter module (48) is outputted; The cabinet (2) has a bottom shell (201); the capacitor module (13), the radiator module (14) and the output part (441) are arranged on the same side of the bottom shell (201) and are sequentially arranged along the length direction or the width direction of the bottom shell (201); wherein the height of the capacitor module (13), the radiator module (14) and the output part (441) from the side, away from the bottom shell (201), of the three modules sequentially decreases.

2. The frequency converter according to claim 1, characterized in that: The cabinet (2) has a first end (20a) located on the side, away from the radiator module (14), of the capacitor module (13); wherein the frequency converter is a suspension type frequency converter, and the frequency converter is suspended through 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) is electrically connected to one of the three phase output terminals of the inverter module (48) in a one-to-one correspondence, and the other end of each of the three first conductive members (44) has a first wiring part (44a), and the three first wiring parts (44a) form the output part (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) form another output part 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 of any of claims 1-4, wherein: The frequency converter further comprises an input module having an input part through which the rectifier module (47) receives three-phase alternating current; the input module comprises three second conductive members (43), one end of each of the three second conductive members (43) is electrically connected to one of the three phase input terminals of the rectifier module (47) in a one-to-one correspondence, and the other end of each of the three second conductive members (43) has a second wiring part (43a), and each of the three second wiring parts (43a) is detachably connected to an adapter (43b), and each of the adapter (43b) has two or more sub-wiring parts (430). Wherein, the input module in the first state, three said adapter (43b) are all from the corresponding second wiring part (43a) is removed, three said second wiring part (43a) forms the input part; the input module in the second state, three said adapter (43b) are all connected to the corresponding second wiring part (43a), three said adapter (43b) on each sub-wiring part (430) forms the input part.

6. The frequency converter of any of claims 1-4, wherein: Further comprising a control module (12), the control module (12) is used for controlling the working state of each of the capacitor module (13), the rectifier module (47) and the inverter module (48); the frequency converter further comprises a partition plate (5), the partition plate (5) divides the frequency converter into a first chamber (55) and a second chamber (56), the first chamber (55) is close 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); Wherein, the partition plate (5) is provided with a through hole (501), and the through hole (501) is provided with a turnover piece (6), the turnover piece (6) can be turned to a first position and a second position, so that the through hole (501) is opened when the first position is opened, and at least part of the components in the first chamber is exposed from the through hole (501); and the through hole (501) is closed when the second position is closed; at least part of the components of the control module (12) is arranged on the turnover piece (6).

7. The frequency converter of claim 6, wherein: The number of said turnover pieces (6) is N, N is a positive integer greater than or equal to 2; the number of said through holes (501) is equal to the number of said turnover pieces (6) and one-to-one correspondence; Wherein, the components of the control module (12) are divided into N parts and are arranged one-to-one on N said turnover pieces (6).

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

9. The frequency converter of any one of claims 1-4, 7, wherein: The frequency converter has a wind-cooled heat dissipation flow channel, and at least part of the heat sink module (14) is located in the wind-cooled heat dissipation flow channel; wherein, the heat sink module (14) is further provided with a liquid-cooled heat dissipation flow channel.

10. The frequency converter of any one of claims 1-4, 7, wherein: The rectifier module (47), the inverter module (48), the capacitor module (13), the heat sink module (14) and the output module are respectively arranged on different support pieces (2a) on the cabinet (2) in a detachable manner.

11. An air compressor, characterized by: The frequency converter of any one of claims 1-10.

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