CN218976548U - Frequency conversion all-in-one and frequency converter thereof - Google Patents

Abstract

The application belongs to the field of frequency conversion equipment, and more specifically relates to a frequency conversion all-in-one machine and a frequency converter thereof. The frequency converter comprises a bottom shell and a frequency conversion unit arranged on the bottom shell; the frequency conversion unit comprises a radiator, a power device arranged on the radiator and a circuit board arranged on one side of the power device away from the radiator, wherein the power device is electrically connected with the circuit board, and the circuit board is fixedly connected with the radiator; the radiator and the circuit board are respectively locked on the bottom shell. The frequency conversion unit is formed by the radiator, the power device and the circuit board, a user can directly install the frequency conversion unit on the bottom shell, and particularly, the radiator and the circuit board are respectively locked on the bottom shell, so that the assembly between the frequency conversion unit and the bottom shell can be realized. Therefore, the user does not need to install all parts of the frequency converter one by one, and the user can overhaul and maintain the frequency conversion integrated machine in the later period conveniently.

Description

Frequency conversion all-in-one and frequency converter thereof

Technical Field

The application belongs to the field of frequency conversion equipment, and more specifically relates to a frequency conversion all-in-one machine and a frequency converter thereof.

Background

The frequency conversion all-in-one combines the frequency converter and the motor into a whole, so that the motor and the frequency converter act together on the premise of greatly reducing the volume, and the electromagnetic interference and the power loss caused by a cable are reduced when the frequency converter and the permanent magnet motor are combined by using the cable. The frequency conversion all-in-one is formed with the wind channel between converter and motor, utilizes the fan on the motor to drive the air current to flow in the wind channel in order to satisfy the heat dissipation demand of converter and motor simultaneously.

Currently, a frequency converter in a frequency conversion integrated machine comprises a base, a radiator, a power device, a circuit board and the like. However, each part of the frequency converter in the frequency conversion integrated machine needs to be installed one by one, the process requirement for assembling each part is high, and users are difficult to assemble the frequency converter by one.

Disclosure of Invention

An aim of the embodiment of the application is to provide a frequency conversion all-in-one machine and a frequency converter thereof, so that the problems that in the related art, all parts of the frequency converter in the frequency conversion all-in-one machine need to be installed one by one, the process requirements for assembling all the parts are high, and users are difficult to assemble by one are solved.

In order to achieve the above purpose, the technical scheme adopted in the embodiment of the application is as follows:

in one aspect, a frequency converter is provided, including a bottom case and a frequency conversion unit mounted on the bottom case;

the frequency conversion unit comprises a radiator, a power device arranged on the radiator and a circuit board arranged on one side of the power device away from the radiator, wherein the power device is electrically connected with the circuit board, and the circuit board is fixedly connected with the radiator;

the radiator and the circuit board are respectively locked on the bottom shell.

In one embodiment, the circuit board comprises a driving plate arranged on one side of the power device, which is away from the radiator, and a control plate arranged on one side of the driving plate, which is away from the power device, wherein the driving plate is respectively and electrically connected with the power device and the control plate, the driving plate is fixedly connected with the radiator, and the control plate is fixedly connected with the driving plate.

In one embodiment, the frequency converter further comprises a plurality of first fasteners, a plurality of first studs are convexly arranged on one surface of the driving plate, facing the control plate, the end part of each first stud is propped against the control plate, and the plurality of first fasteners penetrate through the control plate and are locked on the corresponding first studs in a one-to-one correspondence manner.

In one embodiment, the frequency converter further comprises a plurality of second studs and a plurality of second fasteners, one end of each second stud is fixedly connected with the radiator, the other end of each second stud abuts against the driving plate, and the second fasteners penetrate through the driving plate and are locked at the other ends of the corresponding second studs in a one-to-one correspondence mode.

In one embodiment, the frequency converter further comprises a plurality of third fasteners, the edge of the driving plate exceeds the radiator, the bottom shell is convexly provided with a plurality of third studs, the end part of each third stud is propped against the part of the driving plate exceeding the radiator, and the third fasteners penetrate through the driving plate and are locked at the end parts of the corresponding third studs in a one-to-one correspondence mode.

In one embodiment, the radiator comprises a radiating plate and a plurality of radiating fins arranged on the same surface of the radiating plate, the bottom shell is provided with holes for the plurality of radiating fins to pass through, and the bottom shell is positioned at the edge of the holes and locked with the radiating plate through a fourth fastener.

In one embodiment, a via is formed in a position of the circuit board corresponding to the fourth fastener.

In one embodiment, the frequency converter further comprises a sealing ring clamped between the position of the bottom shell at the edge of the hole site and the heat dissipation plate, and the bottom shell is provided with an annular groove into which the sealing ring extends.

In one embodiment, a thermally conductive layer is disposed between the heat spreader and the power device.

On the other hand, a frequency conversion all-in-one machine is provided, and the frequency converter provided by any one of the embodiments is included.

The frequency conversion all-in-one machine and the frequency converter thereof provided by any one of the embodiments have the following beneficial effects: the manufacturer installs the power device on the radiator, installs the circuit board in the side that the power device deviates from the radiator and is fixed with the radiator, forms the frequency conversion unit through radiator, power device and circuit board. The user can directly install the frequency conversion unit on the drain pan, specifically, locks radiator and circuit board respectively on the drain pan and can realize the assembly between frequency conversion unit and the drain pan. Therefore, the user does not need to install all parts of the frequency converter one by one, and the user can overhaul and maintain the frequency conversion integrated machine in the later period conveniently.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required for the description of the embodiments or exemplary techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

Fig. 1 is a front view of a frequency converter provided in an embodiment of the present application;

FIG. 2 is a cross-sectional view of the transducer of FIG. 1 at A-A;

fig. 3 is a schematic structural diagram of a frequency converter according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a frequency conversion unit according to an embodiment of the present application;

FIG. 5 is an exploded view of the variable frequency unit of FIG. 4;

fig. 6 is a side view of a frequency conversion unit provided in an embodiment of the present application;

fig. 7 is a side view of a connection between a driving board and a power device and a heat sink according to an embodiment of the present application;

fig. 8 is a schematic diagram of connection between a power device and a heat sink according to an embodiment of the present disclosure;

fig. 9 is a schematic diagram of connection between a driving board and a radiator according to an embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of a bottom case according to an embodiment of the present application.

Wherein, each reference numeral in the figure mainly marks:

1. a bottom case; 11. a third stud; 12. hole sites; 13. an annular groove;

2. a frequency conversion unit; 21. a heat sink; 211. a heat dissipation plate; 212. a heat radiation fin; 22. a power device; 23. a circuit board; 231. a driving plate; 2311. a first stud; 232. a control board; 233. a via hole;

3. a first fastener;

41. a second stud; 42. a second fastener;

5. a third fastener;

6. and a fourth fastener.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first," "second," "third," "fourth" and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", "a third" and a fourth "may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. The meaning of "a number" is one or more than one unless specifically defined otherwise.

In the description of the present application, it should be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships that are based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrase "in one embodiment" or "in some embodiments" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As described in the background art, in the prior art, all parts of a frequency converter in a frequency conversion integrated machine need to be installed one by one, the process requirement for assembling all the parts is high, and users are difficult to assemble the frequency converter by one.

In order to solve the above-mentioned problems, an embodiment of the present application provides a frequency converter, referring to fig. 1 to 4, which includes a bottom case 1 and a frequency conversion unit 2 mounted on the bottom case 1. The frequency conversion unit 2 comprises a radiator 21, a power device 22 mounted on the radiator 21 and a circuit board 23 mounted on a side of the power device 22 facing away from the radiator 21. The power device 22 is electrically connected with a circuit board 23, and the circuit board 23 is fixedly connected with the heat sink 21. Wherein the heat sink 21 and the circuit board 23 are locked to the bottom case 1, respectively.

In the embodiment of the application, the manufacturer installs the power device 22 on the radiator 21, installs the circuit board 23 on one side of the power device 22 away from the radiator 21 and is fixed with the radiator 21, and forms the frequency conversion unit 2 through the radiator 21, the power device 22 and the circuit board 23. The user can directly install the frequency conversion unit 2 on the bottom shell 1, specifically, the radiator 21 and the circuit board 23 are respectively locked on the bottom shell 1, so that the assembly between the frequency conversion unit 2 and the bottom shell 1 can be realized. Therefore, the user does not need to install all parts of the frequency converter one by one, and the user can overhaul and maintain the frequency conversion integrated machine in the later period conveniently.

In addition, in the prior art, if the user has the bottom case 1, the user needs to send the bottom case 1 to the manufacturer, and the manufacturer completes the assembly between the bottom case 1 and the rest of the components of the frequency converter, so that the process flow is complex and the transportation cost is high. In this embodiment, the manufacturer can customize the size and shape of the frequency conversion unit 2 according to the bottom shell 1 of the user, and send the frequency conversion unit to the user directly, so that the process flow is simplified, and the transportation cost is saved.

The power device 22 may be a PIM integrated module (power integrated module), an IGBT (Insulated Gate Bipolar Transistor ) integrated module, a MOS single tube (Metal-Oxide-Semiconductor Field-Effect Transistor, metal-Oxide semiconductor field effect transistor) or the like, which may be used for rectification or inversion, and is not limited herein. Illustratively, the power device 22 may be fastened to the heat sink 21 by a screw, and the heat sink 21 cools the power device 22 to ensure reliable operation of the power device 22. The circuit board 23 may be used to control the power device 22, including but not limited to a drive board 231, a control board 232, a control panel, and the like, and is not limited thereto.

Illustratively, a plurality of pins are disposed on a side of the power device 22 facing the circuit board 23, and each pin is soldered to the circuit board 23, so that electrical connection between the power device 22 and the circuit board 23 can be achieved. The circuit board 23 is fixedly connected with the radiator 21, so that the radiator 21, the power device 22 and the circuit board 23 cannot mutually displace in transportation, the stress of pins of the frequency conversion unit 2 in the transportation process is reduced, and the stability of the frequency conversion unit 2 is improved.

The radiator 21 and the circuit board 23 may be fastened to the bottom case 1 by fasteners, for example, threaded holes may be formed in the bottom case 1 at positions corresponding to the radiator 21 and the circuit board 23, and through holes aligned with the corresponding threaded holes may be formed in the radiator 21 and the circuit board 23. The user can pass through the through holes of the heat sink 21 and the circuit board 23 using fasteners such as screws and lock into the corresponding screw holes to lock the heat sink 21 and the circuit board 23 to the bottom chassis 1.

In one embodiment, referring to fig. 2-6, as a specific implementation of the frequency converter provided in the embodiment of the present application, the circuit board 23 includes a driving board 231 installed on a side of the power device 22 facing away from the heat sink 21, and a control board 232 installed on a side of the driving board 231 facing away from the power device 22. The driving board 231 is electrically connected with the power device 22 and the control board 232, respectively, the driving board 231 is fixedly connected with the radiator 21, and the control board 232 is fixedly connected with the driving board 231.

Wherein, each pin of the power device 22 is welded on the driving board 231, so that the driving board 231 can control the power device 22 to work. The driving board 231 and the control board 232 may be electrically connected to each other through terminals, so that the control board 232 may transmit a control signal to the driving board 231.

With this structure, the driving plate 231 and the control plate 232 are stacked on the side of the power device 22 facing away from the heat sink 21, which is beneficial to reducing the cross-sectional area of the frequency converter, thereby reducing the volume of the frequency converter.

In a specific embodiment, referring to fig. 2 and fig. 4 to fig. 6, as a specific implementation of the frequency converter provided in the embodiment of the present application, the frequency converter further includes a plurality of first fasteners 3, and a surface of the driving plate 231 facing the control plate 232 is convexly provided with a plurality of first studs 2311. The end of each first stud 2311 abuts against the control board 232, and a plurality of first fasteners 3 penetrate through the control board 232 and are locked on the corresponding first stud 2311 in a one-to-one correspondence manner.

For example, the driving plate 231 and the plurality of first studs 2311 may be integrally formed. Wherein, one end of each first stud 2311 far away from the driving plate 231 is provided with a threaded hole, and each first fastener 3 passes through the control plate 232 and is in threaded connection with the threaded hole of the corresponding first stud 2311 so as to lock the control plate 232 on the plurality of first studs 2311. It should be noted that the number of the first studs 2311 and the first fasteners 3 in the present embodiment is not limited, and those skilled in the art can set the number of the first studs 2311 as the number of the first fasteners 3 according to actual needs.

In this structure, the control plate 232 can be locked on the driving plate 231 by the plurality of first studs 2311 and the plurality of first fasteners 3, so as to prevent the control plate 232 from moving relative to the driving plate 231.

In a specific embodiment, referring to fig. 2 and fig. 5-9, as a specific implementation of the frequency converter provided in the embodiments of the present application, the frequency converter further includes a plurality of second studs 41 and a plurality of second fasteners 42. One end of each second stud 41 is fixedly connected with the radiator 21, the other end of each second stud 41 abuts against the driving plate 231, and a plurality of second fasteners 42 penetrate through the driving plate 231 and are locked at the other ends of the corresponding second studs 41 in a one-to-one correspondence manner.

For example, a hexagonal stud may be used as the second stud 41, one end of the second stud 41 being provided with a threaded section and the other end being provided with a threaded hole. Each second stud 41 may be threadedly coupled to the heat sink 21 by a threaded section, and each second fastener 42 may pass through the driving plate 231 and be locked into a threaded hole of the corresponding second stud 41.

In this structure, the driving plate 231 can be locked on the radiator 21 by the second stud 41 and the second fastener 42, and in addition, a certain distance is provided between the driving plate 231 and the radiator 21, so as to avoid interference between the driving plate 231 and the power device 22 on the radiator 21.

In a specific embodiment, referring to fig. 2, 3 and 10, as a specific implementation of the frequency converter provided in the embodiments of the present application, the frequency converter further includes a plurality of third fasteners 5. The edge of the driving plate 231 exceeds the radiator 21, the bottom shell 1 is convexly provided with a plurality of third studs 11, the end part of each third stud 11 is propped against the part of the driving plate 231 exceeding the radiator 21, and a plurality of third fasteners 5 penetrate through the driving plate 231 and are locked at the end parts of the corresponding third studs 11 in a one-to-one correspondence manner.

Illustratively, both ends of the driving plate 231 in the width direction thereof extend beyond the radiator 21, and a plurality of third studs 11 are provided on the bottom wall of the bottom case 1 and are integrally formed with the bottom case 1. The number of third studs 11 is four and is located at four corners of the driving plate 231, respectively, for example.

The driving plate 231 can be locked on the bottom shell 1 through the third stud 11 and the third fastening piece 5, so that the reliability of connection between the frequency conversion unit 2 and the bottom shell 1 is ensured.

In an embodiment, referring to fig. 2, fig. 4 and fig. 10, as a specific implementation manner of the frequency converter provided in the embodiment of the present application, the radiator 21 includes a heat dissipation plate 211 and a plurality of heat dissipation fins 212 disposed on the same surface of the heat dissipation plate 211, a hole site 12 through which the plurality of heat dissipation fins 212 pass is formed on the bottom shell 1, and the bottom shell 1 is located at the edge of the hole site 12 and locked with the heat dissipation plate 211 by a fourth fastener 6.

It can be understood that the radiator 21 provided in this embodiment is an air-cooled radiator 21, and when airflow flows in the air duct of the frequency conversion integrated machine, the power device 22 on the radiator 21 can be cooled. Specifically, after the frequency converter is assembled, each radiating fin 212 of the radiator 21 extends into the air duct of the frequency conversion integrated machine from the hole site 12 of the bottom shell 1, and heat generated by the power device 22 can be transferred to each radiating fin 212 and taken away by air flow in the air duct.

In a specific embodiment, referring to fig. 3, 5 and 9, as a specific implementation manner of the frequency converter provided in the embodiment of the present application, a via 233 is provided at a position of the circuit board 23 corresponding to the fourth fastener 6.

Specifically, when only the driving plate 231 covers the mounting position of the fourth fastener 6, the through hole 233 may be opened only at the corresponding position of the driving plate 231; when the driving plate 231 and the control plate 232 cover the mounting positions of the fourth fastener 6 at the same time, it is necessary to provide the through holes 233 at the corresponding positions of the driving plate 231 and the control plate 232. It should be noted that the size of the through hole 233 needs to be enough for the fourth fastening member 6 to pass through, so that the fourth fastening member 6 can lock the heat dissipating plate 211 and the bottom chassis 1.

By providing the through holes 233 on the circuit board 23, it is convenient for a user to fix the radiator 21 on the bottom case 1 using the fourth fastener 6.

In other embodiments, the user can lock the first fastening member 3 from the side of the bottom case 1 facing away from the heat dissipation plate 211, which is not limited only herein.

In a specific embodiment, referring to fig. 2, fig. 4 and fig. 10, as a specific implementation manner of the frequency converter provided in the embodiment of the present application, the frequency converter further includes a sealing ring (not shown) clamped between a position of the bottom shell 1 at an edge of the hole site 12 and the heat dissipation plate 211, and an annular groove 13 into which the sealing ring extends is formed in the bottom shell 1.

The annular groove 13 is arranged around the hole site 12, the sealing ring is embedded into the annular groove 13, and the sealing ring is limited through the annular groove 13.

Through setting up the sealing washer can be with the clearance seal between radiator 21 and the drain pan 1, avoid the dust in the wind channel of frequency conversion all-in-one to get into the converter from the clearance between radiator 21 and the drain pan 1, improved the dustproof performance of converter.

In one embodiment, as a specific implementation manner of the frequency converter provided in the embodiment of the present application, a heat conducting layer is disposed between the heat spreader 21 and the power device 22.

For example, before the power device 22 is assembled with the heat sink 21, a thermal paste may be applied as a thermal conductive layer between the power device 22 and the heat sink 21 so that heat of the power device 22 can be stably transferred to the heat sink 21.

The embodiment of the application also provides a frequency conversion all-in-one machine, which comprises the frequency converter provided by any one of the embodiments. According to the structure, the frequency conversion integrated machine of the frequency converter is adopted, all parts of the frequency converter do not need to be disassembled and assembled one by one in the process of overhauling and maintaining, and a user is convenient to overhaul and maintain.

The foregoing is merely an alternative embodiment of the present application and is not intended to limit the present application, and any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the scope of the present application.

Claims (10)

1. The frequency converter is characterized by comprising a bottom shell and a frequency conversion unit arranged on the bottom shell;

the frequency conversion unit comprises a radiator, a power device arranged on the radiator and a circuit board arranged on one side, away from the radiator, of the power device, wherein the power device is electrically connected with the circuit board, and the circuit board is fixedly connected with the radiator;

the radiator and the circuit board are respectively locked on the bottom shell.

2. The transducer of claim 1, wherein the circuit board comprises a drive board mounted to a side of the power device facing away from the heat sink and a control board mounted to a side of the drive board facing away from the power device, the drive board being electrically connected to the power device and the control board, respectively, the drive board being fixedly connected to the heat sink, the control board being fixedly connected to the drive board.

3. The frequency converter according to claim 2, further comprising a plurality of first fasteners, wherein a face of the driving plate facing the control plate is convexly provided with a plurality of first studs, an end of each first stud abuts against the control plate, and the plurality of first fasteners penetrate through the control plate and are locked on the corresponding first studs one by one.

4. The transducer of claim 2, further comprising a plurality of second studs and a plurality of second fasteners, one end of each second stud being fixedly connected to the heat sink, the other end of each second stud being in abutment with the drive plate, the plurality of second fasteners passing through the drive plate and being in one-to-one correspondence with the other end of the corresponding second stud.

5. The transducer of claim 2, further comprising a plurality of third fasteners, wherein edges of the drive plate extend beyond the heat sink, wherein a plurality of third studs are provided protruding from the bottom shell, wherein an end of each third stud abuts against a portion of the drive plate extending beyond the heat sink, and wherein the plurality of third fasteners penetrate the drive plate and are locked to the end of the corresponding third stud in a one-to-one correspondence.

6. The transducer of claim 1, wherein the heat sink comprises a heat sink plate and a plurality of heat sink fins disposed on the same surface of the heat sink plate, the bottom shell is provided with holes for the plurality of heat sink fins to pass through, and the bottom shell is located at the edge of the holes and locked with the heat sink plate by a fourth fastener.

7. The transducer of claim 6, wherein the circuit board has vias formed therein at locations corresponding to the fourth fasteners.

8. The transducer of claim 6, further comprising a seal ring clamped between the bottom shell and the heat sink plate at a location at the edge of the hole, wherein the bottom shell is provided with an annular groove into which the seal ring extends.

9. A transducer according to any of claims 1-8, wherein a heat conducting layer is arranged between the heat sink and the power device.

10. A frequency conversion all-in-one machine, characterized by comprising a frequency converter according to any one of claims 1-9.

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