CN211908641U

CN211908641U - Frequency converter

Info

Publication number: CN211908641U
Application number: CN202020844603.0U
Authority: CN
Inventors: 畅磊; 乔东昌
Original assignee: Zhejiang Tengen Electric Co Ltd
Current assignee: Zhejiang Tengen Electric Co Ltd
Priority date: 2020-05-19
Filing date: 2020-05-19
Publication date: 2020-11-10
Anticipated expiration: 2030-05-19

Abstract

The utility model relates to a power electronic equipment technical field, concretely relates to converter. A frequency converter, comprising: the working space is arranged in a closed manner, and an electrical element is arranged in the working space; the heat dissipation space is divided from the working space through a partition plate, the heat dissipation space is provided with a fluid inlet and a fluid outlet, and a heat dissipation piece is installed at one end, close to the fluid inlet, in the heat dissipation space; the radiator is arranged in the radiating space and is connected with the partition plate; and the additional space is arranged at one end, far away from the radiating piece, in the radiating space, and a first power device is arranged in the additional space. The heat dissipation device is installed at the fluid inlet and blows air towards the heat dissipation space, air flow rate in the heat dissipation space is increased, dissipation of heat in the heat dissipation space is accelerated, the first power device is separated from other electrical components, the heat dissipation device is directly installed in the heat dissipation space through the additional space, and in the working process, the temperature of the power device is directly reduced through the heat dissipation space, so that the heat reduction efficiency of the frequency converter is greatly increased.

Description

Frequency converter

Technical Field

The utility model relates to a power electronic equipment technical field, concretely relates to converter.

Background

Frequency converters, also known as variable frequency drives or drive controllers. The frequency converter is one kind of speed adjustable driving system, and is used in frequency varying driving technology to change the frequency and amplitude of the work voltage of AC motor for smooth control of AC motor speed and torque.

The application environment of the frequency converter is generally severe, and the circuit board is easy to corrode or accumulate dust to cause short circuit and other problems in a humid and dust environment, so that the protection of the circuit board is an important index of the performance of the frequency converter. Chinese patent document CN207069874U discloses a frequency converter, which is characterized in that a partition board is disposed to divide a box of the frequency converter into a first placing space and a second placing space, a control board with an electrical component is installed in the first placing space, a radiator is installed in the second placing space, the electrical component is isolated from the radiator, and the radiator is used for dissipating heat while ensuring that the electrical component works in a separate closed space to prevent dust pollution. Because the heating power of each electrical element in the frequency converter is different, the structural design of installing the electrical elements in a closed space makes the radiating efficiency of the frequency converter lower, and the devices in the frequency converter can not be effectively radiated, resulting in the shortened service life of the frequency converter.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the poor defect of radiating efficiency of the converter among the prior art to a converter is provided.

In order to solve the technical problem, the utility model provides a frequency converter, include:

the working space is arranged in a closed manner, and an electrical element is arranged in the working space;

the heat dissipation space is divided from the working space through a partition plate, the heat dissipation space is provided with a fluid inlet and a fluid outlet, and a heat dissipation piece is installed at one end, close to the fluid inlet, in the heat dissipation space;

the radiator is arranged in the radiating space and is connected with the partition plate;

and the additional space is arranged at one end, far away from the radiating piece, in the radiating space, and a first power device is arranged in the additional space.

Preferably, a second power device is mounted on a side of the partition within the working space.

Preferably, the radiator includes first heat-conducting plate and the second heat-conducting plate that mutually perpendicular set up, still installs a plurality of supplementary heat-conducting plates at the interval on the first heat-conducting plate, and supplementary heat-conducting plate all sets up with the second heat-conducting plate is parallel, and the array direction of a plurality of supplementary heat-conducting plates is perpendicular with the line direction of fluid inlet and fluid outlet.

Preferably, the partition plate includes a first link plate and a second link plate perpendicular to each other, the first heat-conducting plate is connected to the first link plate, the second heat-conducting plate is connected to the second link plate, and the second power device is mounted on the second link plate.

Preferably, the second power device penetrates through the second connecting plate and corresponds to the second heat conducting plate in position.

Preferably, the first connection board has a third power device mounted on a side thereof located within the work space.

Preferably, the third power device penetrates through the first connecting plate and corresponds to the first heat conducting plate in position.

Preferably, a plurality of electrical components are provided, and the plurality of electrical components are respectively mounted on two circuit boards which are arranged perpendicularly to each other.

Preferably, the heat sink and the partition are connected by a snap.

Preferably, the working space and the heat dissipation space are both arranged in the shell, the shell is formed by assembling a plurality of mounting plates, and the heat radiator and one mounting plate are integrally formed.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a frequency converter, include: the working space is arranged in a closed manner, and an electrical element is arranged in the working space; the heat dissipation space is divided from the working space through a partition plate, the heat dissipation space is provided with a fluid inlet and a fluid outlet, and a heat dissipation piece is installed at one end, close to the fluid inlet, in the heat dissipation space; the radiator is arranged in the radiating space and is connected with the partition plate; and the additional space is arranged at one end, far away from the radiating piece, in the radiating space, and a first power device is arranged in the additional space.

The heat dissipation device comprises a fluid inlet, a heat dissipation space, a first power device, a second power device, an additional space and a heat dissipation space, wherein the heat dissipation space is internally provided with a heat dissipation part, the first power device is arranged at the fluid inlet, and blows air towards the heat dissipation space, the air flow rate in the heat dissipation space is increased, the heat dissipation in the heat dissipation space is accelerated, the first power device which releases more heat during working is separated from other electrical. In the working process, the first power device is directly cooled through the heat dissipation space, and the heat reduction efficiency of the frequency converter is greatly improved. The first power device is separated from other devices, so that the influence of high temperature released by the first power device on other devices is avoided, and the service life of the frequency converter is prolonged; meanwhile, the size of a working space is reduced, and the overall size of the frequency converter is further reduced.

2. The utility model provides a frequency converter, second power device is installed to one side that the baffle is in the working space. The second power device which releases more heat during working is installed in direct contact with the partition plate, the partition plate is utilized to enhance the cooling efficiency of the heat dissipation space on the second power device, the heat dissipation cooling efficiency of the frequency converter is further enhanced, and the service life of the frequency converter is prolonged.

3. The utility model provides a frequency converter, radiator include the first heat-conducting plate and the second heat-conducting plate that mutually perpendicular set up, go back the interval on the first heat-conducting plate and install a plurality of supplementary heat-conducting plates, supplementary heat-conducting plate all with second heat-conducting plate parallel arrangement, the line direction of a plurality of supplementary heat-conducting plates is perpendicular with fluid inlet and fluid outlet's line direction. The auxiliary heat conducting plate is utilized to conduct fluid in the heat dissipation space, the flowing speed of the fluid in the heat dissipation space is accelerated, heat transmitted to the heat dissipation space from the working space and the auxiliary space can be taken away quickly, and the cooling efficiency of the frequency converter is further improved.

4. The utility model provides a frequency converter, baffle include that mutually perpendicular's first even board and second are even the board, and first heat-conducting plate is connected with first link plate, and the second heat-conducting plate is even the board with the second and is connected, and the second power device is installed on the second is even the board. Through setting up vertically baffle and radiator cooperation installation, increase the area of contact of baffle and radiator, increased the quantity of the electrical components that can directly contact the installation with the baffle in the working space, strengthened the cooling effect of converter.

5. The utility model provides a frequency converter, electrical components are equipped with a plurality ofly, and a plurality of electrical components are installed respectively on the circuit board that two mutually perpendicular set up. The electric appliance elements are respectively arranged on different circuit boards, and the circuit boards are vertically arranged, so that the size of a working space is reduced, and the integral size of the frequency converter is further reduced.

6. The utility model provides a converter, radiator pass through the buckle with the baffle and are connected, utilize the buckle installation to replace original bolt installation, the user need not to look over the description when the installation, with the mounted position aim at the back direct mount can, simplified the mounting means of converter for the packaging efficiency of converter.

7. The utility model provides a converter, workspace and heat dissipation space all install in the shell, and the shell is formed by the equipment of polylith mounting panel, radiator and a mounting panel integrated into one piece. The dust in the air duct of the radiator can be cleaned after the mounting plate which is integrally formed with the radiator is dismounted from the shell, and the operation is convenient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a frequency converter provided in an embodiment of the present invention.

Fig. 2 is a schematic diagram of an installation position of an extended interface on a frequency converter according to an embodiment of the present invention.

Fig. 3 is a schematic view of a mounting position of a fluid outlet on a frequency converter according to an embodiment of the present invention.

Fig. 4 is a schematic view of an installation position of a fluid inlet on a frequency converter according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a heat dissipation space and a working space provided in an embodiment of the present invention.

Fig. 6 is a schematic view of an installation position of a heat sink according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of another view angle of the heat dissipation space and the working space provided in the embodiment of the present invention.

Fig. 8 is a schematic diagram of installation positions of the second power device and the third power device provided in the embodiment of the present invention.

Fig. 9 is a schematic structural diagram of a heat sink according to an embodiment of the present invention.

Description of reference numerals: 1. a heat dissipation space; 2. a workspace; 3. an expansion interface; 4. a housing; 5. a partition plate; 6. a fluid inlet; 7. a fluid outlet; 8. a protective net; 9. a heat sink; 10. an additional space; 11. A first heat-conducting plate; 12. a second heat-conducting plate; 13. an auxiliary heat-conducting plate; 14. a second power device; 15. a third power device.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Fig. 1 to 9 show a specific embodiment of the frequency converter provided by the present invention, which includes: the heat dissipation device comprises a heat dissipation space 1 and a working space 2 which is arranged in a closed mode, wherein a printed circuit board is installed in the working space 2, and electric elements for frequency conversion work are integrated on the printed circuit board. Two expansion interfaces 3 are integrated in the working space 2 for connecting expansion equipment. In order to guarantee the leakproofness of converter, heat dissipation space 1 and workspace 2 are all installed in the shell 4 that encloses through the buckle connection by the polylith mounting panel.

As shown in fig. 5 to 7, the heat dissipation space 1 is divided from the working space 2 by a partition 5, and the heat dissipation space 1 is provided with a fluid inlet 6 and a fluid outlet 7. In order to reduce the volume of the working space 2, the printed circuit board in the working space is assembled in a three-dimensional mode. The printed circuit board comprises a first circuit board and a second circuit board which are perpendicular to each other, a third circuit board is spliced on the first circuit board in parallel, a fourth circuit board is spliced on the second circuit board in perpendicular, the first circuit board and the partition board 5 are installed in parallel, electrical elements are installed on the independent circuit boards respectively, and the circuit boards are spliced in a three-dimensional mode, so that the size of the working space 2 is greatly reduced, the integral size of the frequency converter is reduced, and the space required for installing the frequency converter is reduced. As shown in fig. 5, in order to prevent dust and impurities from entering the frequency converter, protective nets 8 are installed at both the fluid inlet 6 and the fluid outlet 7, so as to reduce the influence of dust on electrical components. As shown in fig. 6, a fan serving as a heat dissipation member 9 is installed at one end of the heat dissipation space 1 near the fluid inlet 6, and is used for blowing air into the heat dissipation space 1, so as to accelerate the flow rate of air in the heat dissipation space 1, and thus the air can rapidly take out heat in the heat dissipation space 1.

A radiator is arranged in the radiating space 1, and the radiator is in direct contact connection with the partition plate 5 and is connected with the partition plate through a buckle. One end of the heat dissipation space 1 far away from the heat dissipation piece 9 is provided with two additional spaces 10, an electrolytic capacitor serving as a first power device is installed in the additional spaces 10, the electrolytic capacitor is directly installed in the heat dissipation space 1 due to the fact that more heat is released in the working process, the electrolytic capacitor is directly cooled through the heat dissipation space 1, and the heat reduction efficiency of the frequency converter is greatly improved. The electrolytic capacitor is separated from other devices, so that the influence of high temperature released by the electrolytic capacitor on other devices is avoided, and the service life of the frequency converter is prolonged; meanwhile, the size of the working space 2 is reduced, and the overall size of the frequency converter is further reduced.

Install the radiator on the mounting panel of shell 4, the radiator includes first heat-conducting plate 11 and the second heat-conducting plate 12 that mutually perpendicular set up, as shown in fig. 9, radiator and mounting panel integrated into one piece, in order to further accelerate the velocity of flow of air in heat dissipation space 1, still install a plurality of supplementary heat-conducting plates 13 at the interval on the first heat-conducting plate 11, supplementary heat-conducting plate 13 all with second heat-conducting plate 12 parallel arrangement, the line direction of a plurality of supplementary heat-conducting plates 13 is perpendicular with the line direction of fluid inlet 6 and fluid outlet 7. Utilize supplementary heat-conducting plate 13 to carry out the drainage to the fluid in heat dissipation space 1 for the speed of the fluidic flow in heat dissipation space 1 for the heat that transmits to in heat dissipation space 1 in working space 2 and the auxiliary space can be taken away comparatively fast, and then the cooling efficiency of reinforcing converter. The partition plate 5 includes a first connecting plate and a second connecting plate perpendicular to each other, the first heat-conducting plate 11 is connected to the first connecting plate, and the second heat-conducting plate 12 is connected to the second connecting plate. As shown in fig. 8, a fet as the second power device 14 in the work space 2 is disposed through the second connecting plate, and the mounting position of the second power device 14 corresponds to the position of the second heat conducting plate 12; an insulated gate bipolar transistor as a third power device 15 in the work space 2 is disposed through the first heat conduction plate, and the mounting position of the third power device 15 corresponds to the position of the first heat conduction plate 11. Because the first heat-conducting plate 11 is connected with the first connecting plate, the second heat-conducting plate 12 is connected with the second connecting plate, the through hole of the third power device 15 on the first connecting plate is sealed by the first heat-conducting plate 11, and the through hole of the second power device 14 on the second connecting plate is sealed by the second heat-conducting plate 12, the sealing performance of the working space 2 is ensured.

The utility model provides a heat dissipation piece 9 is installed in 6 departments of fluid import to the converter for blow in the heat dissipation space 1, increased the air flow rate in the heat dissipation space 1, accelerated the thermal scattering and disappearing in the heat dissipation space 1. The first power device, which radiates more heat during operation, is separated from other electrical components and is directly installed in the heat dissipation space 1 through the additional space 10. In the working process, the first power device is directly cooled through the heat dissipation space 1, and the heat reduction efficiency of the frequency converter is greatly improved. The first power device is separated from other devices, so that the influence of high temperature released by the first power device on other devices is avoided, and the service life of the frequency converter is prolonged; meanwhile, the size of the working space 2 is reduced, and the overall size of the frequency converter is further reduced.

As an alternative embodiment, the second power device may also be in a semiconductor triode or an insulated gate bipolar transistor.

As an alternative embodiment, the heat sink is mounted on the mounting plate by means of a snap fit.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A frequency converter, comprising:

the working space (2) is arranged in a closed mode, and electrical components are installed in the working space (2);

the heat dissipation device comprises a heat dissipation space (1) and a working space (2), wherein the heat dissipation space (1) is divided by a partition plate (5), the heat dissipation space (1) is provided with a fluid inlet (6) and a fluid outlet (7), and a heat dissipation piece (9) is installed at one end, close to the fluid inlet (6), in the heat dissipation space (1);

the radiator is arranged in the radiating space (1) and is connected with the partition plate (5);

the additional space (10) is installed at one end, far away from the heat dissipation piece (9), in the heat dissipation space (1), and a first power device is installed in the additional space (10).

2. Frequency converter according to claim 1, characterized in that the side of the partition (5) in the working space (2) is fitted with a second power component (14).

3. The frequency converter according to claim 2, characterized in that the heat sink comprises a first heat conducting plate (11) and a second heat conducting plate (12) which are arranged perpendicularly to each other, a plurality of auxiliary heat conducting plates (13) are further mounted on the first heat conducting plate (11) at intervals, the auxiliary heat conducting plates (13) are all arranged in parallel with the second heat conducting plate (12), and the arrangement direction of the plurality of auxiliary heat conducting plates (13) is perpendicular to the connecting line direction of the fluid inlet (6) and the fluid outlet (7).

4. Frequency converter according to claim 3, characterized in that the partition (5) comprises a first and a second link plate perpendicular to each other, the first heat-conducting plate (11) being connected to the first link plate, the second heat-conducting plate (12) being connected to the second link plate, the second power device (14) being mounted on the second link plate.

5. Frequency converter according to claim 4, characterized in that said second power device (14) penetrates said second connecting plate and corresponds in position to said second heat-conducting plate (12).

6. Frequency converter according to claim 4 or 5, characterized in that the first connection board is fitted with a third power device (15) on the side located inside the working space (2).

7. The frequency converter according to claim 6, characterized in that the third power device (15) penetrates the first connecting plate and corresponds to the first heat-conducting plate (11).

8. The frequency converter according to any one of claims 1 to 5, wherein a plurality of said electrical components are provided, and a plurality of said electrical components are respectively mounted on two circuit boards arranged perpendicularly to each other.

9. Frequency converter according to any of claims 1 to 5, characterized in that the heat sink is snap-fitted to the partition (5).

10. Frequency converter according to any of claims 1 to 5, characterized in that the working space (2) and the heat dissipation space (1) are both mounted in a housing (4), the housing (4) being assembled from a plurality of mounting plates, the heat sink being integrated with one of the mounting plates.