CN211530530U

CN211530530U - Anti-interference active filter

Info

Publication number: CN211530530U
Application number: CN201922482492.3U
Authority: CN
Inventors: 封其伟
Original assignee: Sttelec Changzhou Co ltd
Current assignee: Sttelec Changzhou Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-09-18
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses an anti-interference active filter belongs to active filter technical field, and its technical scheme main points are as follows, including casing, active filter main part and cooling system, the casing is airtight structure, and active filter main part and cooling system fixed connection are inside the casing. The utility model discloses seal active filter main part and cooling system in a cavity, form the inner loop of air, the dust of smuggleing secretly in the air of avoiding the cooling system of extrinsic cycle in order to cause the interference to active filter's operating condition, avoid the acid gas in the air to cause the corruption to active filter components and parts simultaneously, prolonged active filter's life when having guaranteed active filter normal work, had industrial value.

Description

Anti-interference active filter

Technical Field

The utility model discloses active filter field, in particular to anti-interference active filter.

Background

The active filter is a novel power electronic device for dynamically inhibiting harmonic waves and compensating reactive power, most of the existing active filters are designed in an integral mode, in the actual use process, most of the active filters are used independently to form a single filter circuit, along with the development of the science and technology, multiple elements of electronic equipment are generated, the traditional single filter circuit is difficult to meet the existing complex circuit, and at the moment, a plurality of filters are needed to be combined for use, so that the original single filter circuit is expanded to a modularized mode, the filter circuits of multiple circuits and the modularized design are adopted, the normal work of other modules cannot be influenced by any module fault, the reliability of the whole equipment is greatly improved, because the combination needs an additional mounting bracket, the practicability of the device is greatly reduced, and when the active filters are combined for use, the temperature of the contact area is too high, and the integral practicability and efficiency are influenced, greatly reducing the practicability. The existing cooling system adopts an external circulation system, dust and acid gas in the outside air easily interfere the work of the active filter, and the working efficiency of the active filter for dynamically inhibiting harmonic waves and compensating reactive power is reduced.

In view of the above problems, the present inventors have conducted extensive practical experience and professional knowledge for many years in engineering applications of such products, and have conducted active research and innovation in cooperation with the application of theory to create an anti-interference active filter, which is more practical.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an anti-interference active filter has sealed air inner loop cooling system, effectively prevents the dust and the acid gas in the outside air to active filter's interference, has industrial value.

The above technical purpose of the present invention can be achieved by the following technical solutions:

an anti-interference active filter comprises a shell, an active filter main body and a cooling system, wherein the shell is of a closed structure, and the active filter main body and the cooling system are fixedly connected inside the shell.

Furthermore, the cooling system comprises a cavity, a cooling pipe and a fan, wherein the cooling pipe is arranged in the cavity and fixedly connected with the shell; the fan is inlayed on the cavity, and the cavity is provided with a plurality of ventilation holes, and fan and ventilation hole are used for accomplishing the circulation of the inside air of casing.

Furthermore, the cooling pipe and the fan are respectively arranged at the two farthest ends in the cavity.

Furthermore, the heat dissipation device is arranged outside the shell and fixedly connected with the shell.

Furthermore, the heat dissipation device is solid cooling fins fixed on the outer wall of the shell, and the number of the solid cooling fins is a plurality of solid cooling fins and is arranged at one end far away from the cooling system.

Further, an anti-interference active filter is characterized in that a shell is arranged outside the shell, and the shell is completely covered inside the shell; the shell includes fan and a plurality of louvre, and the setting is inlayed on the shell to the fan for accomplish the circulation of the inside air of shell and outside air jointly with the louvre.

Further, the position of the fan and the position of the heat dissipation hole are symmetrical with respect to the long axis of the shell.

Furthermore, the shell of the anti-interference active filter is fixedly connected with the other end of the heat dissipation device.

To sum up, the utility model discloses following beneficial effect has:

the utility model discloses seal active filter main part and cooling system in a cavity, form the inner loop of air, the dust of smuggleing secretly in the air of avoiding the cooling system of extrinsic cycle in order to cause the interference to active filter's operating condition, avoid the acid gas in the air to cause the corruption to active filter components and parts simultaneously, prolonged active filter's life when having guaranteed active filter normal work.

Drawings

Fig. 1 is a schematic diagram of an anti-interference active filter being implemented;

fig. 2 is a top view of an anti-interference active filter of the present invention;

fig. 3 is a schematic view of the fan of the present invention;

FIG. 4 is a schematic view of the heat dissipation holes of the present invention;

fig. 5 is a schematic view of the heat dissipation device of the present invention fixedly connected to the housing;

in the figure: 1. the filter comprises a shell, 11 heat dissipation devices, 2 active filter bodies, 3 cooling systems, 31 cavities, 311 air vents, 32 cooling pipes, 33 fans, 4 shells, 41 fans and 42 heat dissipation holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are the directions or positional relationships indicated on the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element indicated must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

An anti-interference active filter is shown in fig. 1 and comprises a shell 1, an active filter main body 2 and a cooling system 3, wherein the shell 1 is of a closed structure, and the active filter main body 2 and the cooling system 3 are fixedly connected inside the shell 1.

In this embodiment, set up casing 1 to airtight structure, make cooling system 3's cooling cycle form the inner loop of air, do not contact with the outside air, avoid the dust in the outside air to active filter's interference and the corruption of acid alkaline gas to components and parts, when guaranteeing active filter normal work, prolonged active filter's life.

In this embodiment, as shown in fig. 2, the cooling system 3 includes a cavity 31, a cooling pipe 32 and a fan 33, wherein the cooling pipe 32 is disposed inside the cavity 31 and fixedly connected to the housing 1; the fan 33 is embedded on the cavity 31, the cavity 31 is provided with a plurality of vent holes 311, and the fan 33 and the vent holes 311 are used for completing the circulation of air inside the shell 1; the fan 33 rotates to suck air in the housing 1 into the cavity 31, the air contacts the cooling pipe 32, the temperature of the air is reduced to form cold air, the cold air is diffused to the outside of the cavity 31 through the vent holes 311, the active filter body 2 is cooled, and the working temperature of the active filter is guaranteed.

In this embodiment, as shown in fig. 2, the cooling pipe 32 and the fan 33 are respectively disposed at the farthest ends in the cavity 3. Preferably, the cavity 3 is rectangular, the cooling pipe 32 and the fan 33 are disposed at the two farthest ends of the cavity 3, that is, the cooling pipe 32 and the fan 33 are disposed at two opposite sides of the rectangular cavity 3, and the other two opposite sides are provided with a plurality of ventilation holes 311, such an arrangement can increase the flowing distance of air inside the cavity 3 and increase the heat exchange speed, and the ventilation holes 311 are disposed oppositely, so that convection can be formed, the heat exchange rate is improved, and the cooling rate is increased. Wherein the cooling liquid in the cooling pipe can be cold water, and can also be other fluids that can play the cooling effect, and this is not in the limit of the utility model.

In this embodiment, as shown in fig. 2, a heat sink 11 is disposed outside the housing 1, and the heat sink 11 is fixedly connected to the housing 1. Active filter operating time overlength, when causing the inside temperature of casing 1 to rise rapidly, for rapid cooling, at 1 outside heat abstractor 11 that sets up of casing, cool down the air of casing inside, effectively solve the inside rapid heating up of casing 1, the untimely problem of cooling, the seal of casing 1 has also been guaranteed simultaneously, prevent the dust to the interference of active filter main part 2 and the corruption of acid alkaline gas to components and parts, when guaranteeing active filter normal work, active filter's life has been prolonged. In this embodiment, the heat dissipation device 11 is a plurality of solid heat dissipation fins fixed on the outer wall of the housing 1, and is disposed at an end far from the cooling system 3. The heat dissipation rate of the solid radiating fin is faster than that of air, and the solid radiating fin is arranged at one end far away from the cooling system because the air temperature at one end far away from the cooling system is higher, and the solid radiating fin is difficult to be rapidly cooled because of being far away from the cooling system, so that the solid radiating fin is adopted to assist in cooling. The heat dissipation device 11 can be arranged on each outer wall of the shell 1, air inside the shell 1 and the shell is cooled in an all-around mode, air cooling and heat convection inside the shell 1 is reduced, damage to precise electronic components caused by force generated by air flowing is reduced, and interference caused by the air flowing to the working state of the active filter is reduced.

In this embodiment, as shown in fig. 2 to 4, a shell 4 is disposed outside a casing 1, and the casing 1 is completely covered inside the shell 4; the shell 4 comprises a fan 41 and a plurality of heat dissipation holes 42, wherein the fan 41 is embedded in the shell 4 and used for completing the circulation of air inside the shell (4) and outside air together with the heat dissipation holes (42).

If the heat obtained by the heat exchange of the heat dissipation device 11 is not dissipated in time, the heat dissipation effect of the heat dissipation device 11 can be affected, so that the shell 4 is arranged to dissipate the heat of the heat dissipation device 11, the heat dissipation efficiency of the anti-interference active filter is further improved, the working temperature of the active filter is ensured, the working efficiency of the active filter is improved, and the service life of the active filter is prolonged.

In this embodiment, the position of the fan 41 and the position of the heat dissipation hole 42 are symmetrical about the long axis of the housing 4, the housing 4 can be set to be rectangular, the fan 41 and the heat dissipation hole 42 are respectively arranged on two opposite sides of the housing 4, the flowing distance of the hot and cold air in the housing 4 can be prolonged, the exchange area of the hot and cold air is also increased, and the cooling rate is increased.

In this embodiment, as shown in fig. 5, the housing 4 is fixedly connected to the other end of the heat sink 11. Through this kind of setting, link together shell 4 and casing 1 through heat abstractor 11, make the air in casing 1 and the casing 1 pass through heat abstractor 11 with heat conduction on shell 4, improve the cooling rate of shell 4 to the air in casing 1 and the casing 1, simultaneously, casing 1 can form a whole with the shell, has improved the stability of casing 1 and shell 4. In order to facilitate disassembly, the heat dissipation device 11 and the housing 1 and the heat dissipation device 11 and the housing 4 are connected by using the slots in this embodiment, and different numbers of heat dissipation devices 11 can be selected according to different heat dissipation requirements.

The working principle of the anti-interference active filter provided by the embodiment is as follows:

when the active filter body 2 starts to operate, the fan 33 starts to operate synchronously, air inside the housing 1 and outside the cavity 31 is sucked into the cavity 31 of the cooling system 3 through rotation of the fan and contacts with the cooling pipe 32, and the air is discharged from the vent holes 311 to the outside of the cavity 31 after being cooled and contacts with the active filter body 2, so that heat is dissipated from the active filter body 2.

In order to further improve the heat dissipation rate, in this embodiment, the heat dissipation device 11 fixedly connected to the housing 1 is disposed outside the housing 1, the housing 1 and the heat dissipation device 11 can conduct heat to cool the housing 1, and the air in the housing 1 exchanges heat with the housing 1, so as to cool the air in the housing 1.

In this embodiment, the housing 4 is further disposed outside the casing 1, and is configured to dissipate heat in time from the heat dissipating device 11, that is, the fan 41 of the housing 4 rotates to perform overheat exchange with the heat dissipating device 11, and the air with a raised temperature is discharged from the housing 4, in order to ensure that the air pressure inside the housing 4 is constant, the air outside the housing 4 enters the housing 4 through the heat dissipating holes 42, so as to exchange cold and hot air in the housing 4, and achieve the purpose of cooling the heat dissipating device 11.

Furthermore, in the present embodiment, the heat sink 11 is fixedly connected to the housing 4, so that the housing 1 and the housing 4 can conduct heat in a solid state, thereby increasing the heat dissipation rate of the housing 1.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The anti-interference active filter is characterized by comprising a shell (1), an active filter main body (2) and a cooling system (3), wherein the shell (1) is of a closed structure, and the active filter main body (2) and the cooling system (3) are fixedly connected inside the shell (1).

2. An antijam active filter according to claim 1, characterized in that the cooling system (3) comprises a cavity (31), a cooling pipe (32) and a fan (33), the cooling pipe (32) being arranged inside the cavity (31) and being fixedly connected to the housing (1); fan (33) are inlayed on cavity (31), just cavity (31) are provided with a plurality of ventilation holes (311), fan (33) with ventilation hole (311) are used for accomplishing the circulation of casing (1) inside air.

3. An antijam active filter according to claim 2, characterized in that the cooling duct (32) and the fan (33) are arranged at the ends furthest inside the cavity (31).

4. An antijam active filter according to claim 1, characterized in that a heat sink (11) is provided outside the housing (1), the heat sink (11) being fixedly connected to the housing (1).

5. An antijam active filter according to claim 4, characterized in that the heat dissipating means (11) are solid fins fixed to the outer wall of the housing (1), the number of solid fins being several and being arranged at the end remote from the cooling system (3).

6. An antijam active filter according to claim 4, characterized in that an outer casing (4) is provided outside the housing (1), the housing (1) being completely enclosed inside the outer casing (4); the shell (4) comprises a fan (41) and a plurality of heat dissipation holes (42), wherein the fan (41) is embedded in the shell (4) and used for completing the circulation of air inside the shell (4) and outside air together with the heat dissipation holes (42).

7. An antijam active filter according to claim 6, characterized in that the position of the fan (41) and the position of the heat dissipation aperture (42) are symmetrical with respect to the long axis of the housing (4).

8. An antijam active filter according to claim 6, characterized in that the housing (4) is fixedly connected to the other end of the heat sink (11).