CN210225245U

CN210225245U - LCL filter of three-phase grid-connected inverter

Info

Publication number: CN210225245U
Application number: CN201921450199.2U
Authority: CN
Inventors: Leiyang Zheng; 郑雷阳; Yuling Chen; 陈玉玲
Original assignee: Shenzhen Tuzhihong Electronic Technology Co ltd
Current assignee: Shenzhen Tuzhihong Electronic Technology Co ltd
Priority date: 2019-09-03
Filing date: 2019-09-03
Publication date: 2020-03-31
Anticipated expiration: 2029-09-03

Abstract

The utility model belongs to the technical field of filters, and discloses an LCL filter of a three-phase grid-connected inverter, which comprises a shell, wherein a cover plate is arranged at the top of the shell, binding posts are fixed on two side walls of the shell, clamping grooves are arranged at four corners at the top of the shell, clamping pins penetrate through four corners inside the cover plate, screw holes are arranged on the side walls of the clamping pins, screw buttons matched with the screw holes are arranged on the side walls of the shell, a spring is arranged at the bottom end inside the clamping grooves, a pressing plate is fixed at the top of the spring, and a heat dissipation seat is arranged at the bottom end of the shell. The operation is simple and convenient.

Description

LCL filter of three-phase grid-connected inverter

Technical Field

The utility model belongs to the technical field of the wave filter, concretely relates to three-phase grid-connected inverter's LCL wave filter.

Background

The filter is a filter circuit consisting of a capacitor, an inductor and a resistor, and can effectively filter a frequency point of a specific frequency in a power line or frequencies except the frequency point to obtain a power signal of the specific frequency or eliminate the power signal of the specific frequency.

In chinese patent with patent number CN201720986618.9, an LCL filter of three-phase grid-connected inverter is disclosed, this patent encapsulates internal element through upper cover and casing connection, but does not set up convenient to detach and fixed structure, because the filter is easy to produce the damage after long-time use internal element, and the dismantlement equipment of filter is loaded down with trivial details complicacy, thereby be difficult to in time change the maintenance, in addition, the device is through setting up the water cooler on the electric capacity and seting up the through-hole to the device and cool down the heat dissipation, nevertheless because the limitation of wave filter inner space, lead to the heat to be unable quick getting rid of, thereby unable effectual radiating effect that plays, outside air gets into easy inside of making from the through-hole simultaneously and wets, thereby damage electronic component.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a three-phase grid-connected inverter's LCL wave filter to what provide does not set up convenient to detach and fixed structure in solving above-mentioned background art, and can't effectually play the problem of radiating effect.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a three-phase grid-connected inverter's LCL wave filter, includes the casing, the apron is installed at the top of casing, and the both sides wall of casing all is fixed with the terminal, the draw-in groove has all been seted up to four corners in the top of casing, four corners in the inside of apron all run through there is the bayonet lock, the screw has been seted up to the lateral wall of bayonet lock, the lateral wall of casing install with screw assorted knob, the spring is installed to the inside bottom of draw-in groove, the top of spring is fixed with the clamp plate.

Preferably, the radiating seat is installed to the bottom of casing, and the bottom of casing has seted up the connecting hole, the internally mounted of radiating seat has the fan, the through-hole has all been seted up to the both sides of casing, the screen cloth is all installed at the inside both ends of through-hole, and the inside position department that is located between two screen cloths of through-hole has the rotor through pivot swing joint, the internally mounted of screen cloth has the sponge that absorbs water.

Preferably, the top of the cover plate is provided with a groove matched with the bayonet lock, and the diameter of the cross section of the bayonet lock is the same as that of the cross section of the groove.

Preferably, the side wall of the heat dissipation seat is provided with a heat dissipation groove, and the heat dissipation groove is located at a position below the binding post.

Preferably, a nameplate is installed at the top of the cover plate, and a mounting seat is fixed on one side of the shell.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses an in the bayonet lock inserted the draw-in groove, then made the knob and screw close the fastening each other soon to with apron and casing reciprocal anchorage, when needs are dismantled, separation knob and screw, bayonet lock can be popped out under the effect of spring, and then realize the quick dismantlement and the fixed of device, easy operation is convenient.

(2) The utility model discloses a fan work produces the air current and enters into the inside of casing from the connecting hole, and the air current drives the revolving fragment simultaneously and rotates to the circulation of air speed of through-hole department with higher speed, the inside and outside air exchange of being convenient for, and then play the effect of heat dissipation cooling, when the air when the screen cloth, absorb the dehumidification to the moisture in the air under the effect of sponge that absorbs water, thereby avoid the component to wet the damage.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is an enlarged view of portion B of FIG. 2;

in the figure: 1-a heat sink; 2-a heat dissipation seat; 3-a shell; 4-a knob; 5-cover plate; 6-bayonet lock; 7-a binding post; 8-connecting holes; 9-a fan; 10-a nameplate; 11-screw holes; 12-a card slot; 13-a platen; 14-a spring; 15-a screen mesh; 16-a via hole; 17-a rotating plate; 18-absorbent sponge.

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. 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.

Referring to fig. 1-4, the present invention provides the following technical solutions: an LCL filter of a three-phase grid-connected inverter comprises a shell 3, a cover plate 5 is installed at the top of the shell 3, binding posts 7 are fixed on two side walls of the shell 3, clamping grooves 12 are formed in four corners of the top of the shell 3, clamping pins 6 penetrate through four corners inside the cover plate 5, screw holes 11 are formed in side walls of the clamping pins 6, screw buttons 4 matched with the screw holes 11 are installed on the side walls of the shell 3, springs 14 are installed at the bottom ends inside the clamping grooves 12, pressing plates 13 are fixed at the tops of the springs 14 and are inserted into the clamping grooves 12 through the clamping pins 6, then the screw buttons 4 are inserted into the screw holes 11, the screw buttons 4 and the screw holes 11 are fastened in a mutually screwed mode, the cover plate 5 and the shell 3 are fixed mutually, the clamping pins 6 push pressing plates 13 to enable the springs 14 to contract, when the device needs to be disassembled, the screw buttons 4 and the screw holes 11 are separated, then the clamping pins, the operation is simple and convenient.

Further, the heat dissipation seat 2 is installed at the bottom end of the shell 3, the bottom of the shell 3 is provided with a connecting hole 8, a fan 9 is installed inside the heat dissipation seat 2, through holes 16 are respectively formed in two sides of the shell 3, screens 15 are respectively installed at two ends inside the through holes 16, the screens 15 have a dustproof effect, a rotating piece 17 is movably connected to a position, located between the two screens 15, inside the through holes 16 through a rotating shaft, a water absorption sponge 18 is installed inside the screens 15, air flow is generated through the work of the fan 9, then the air flow enters the inside of the shell 3 through the connecting hole 8, and then the air flow is exchanged with outside air through the through holes 16, so that the hot air and the outside cold air are convected, meanwhile, the air flow drives the rotating piece 17 to rotate, so as to further accelerate the air circulation rate at the through holes 16, further to play a role in heat dissipation, the water in the air is absorbed and dehumidified by the water absorption sponge 18, so that the element is prevented from being damaged by moisture.

Further, the top of apron 5 is seted up with bayonet lock 6 assorted recess, can play the protection fastening effect to bayonet lock 6's top through the recess, and the cross section diameter of bayonet lock 6 is the same with the cross section diameter of recess.

Specifically, the side wall of the heat sink 2 is provided with a heat sink 1, the heat sink 1 plays a role of ventilation and heat dissipation, and the heat sink 1 is located at a position below the terminal 7.

Specifically, the top of the cover plate 5 is provided with a nameplate 10, the nameplate 10 plays a role in warning description, and one side of the shell 3 is fixed with a mounting seat through which the device is convenient to fix.

The utility model discloses a theory of operation and use flow: when the utility model is used, firstly, the device is fixed in a circuit through a mounting seat on one side of a shell 3, then an electric wire is connected through a binding post 7, when a filter is used, a fan 9 is electrified to work to generate air flow, then the air flow enters the shell 3 through a connecting hole 8, then the air flow is exchanged with the outside air through a through hole 16, thereby hot air and the outside cold air are in convection, meanwhile, the air flow drives a rotating piece 17 to rotate, thereby further accelerating the air circulation rate at the through hole 16, further playing the role of heat dissipation and cooling, when the air passes through a screen 15, the moisture in the air is absorbed and dehumidified under the action of a water absorption sponge 18, thereby avoiding the element from being affected with damp and damaged, when the dismounting device is required to be repaired, the dismounting screw button 4 and the screw hole 11 are separated, then the bayonet 6 is popped out under the action of the spring 14, then the cover plate 5 can be dismounted, and then realize quick dismantlement and fixed of device, easy operation is convenient.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The LCL filter of the three-phase grid-connected inverter is characterized in that: including casing (3), apron (5) are installed at the top of casing (3), and the both sides wall of casing (3) all is fixed with terminal (7), draw-in groove (12) have all been seted up to four corners in the top of casing (3), four corners in the inside of apron (5) have all run through bayonet lock (6), screw (11) have been seted up to the lateral wall of bayonet lock (6), the lateral wall of casing (3) install with screw (11) assorted turn-button (4), spring (14) are installed to the inside bottom of draw-in groove (12), the top of spring (14) is fixed with clamp plate (13).

2. The LCL filter of a three-phase grid-connected inverter according to claim 1, wherein: radiating seat (2) are installed to the bottom of casing (3), and connecting hole (8) have been seted up to the bottom of casing (3), the internally mounted of radiating seat (2) has fan (9), through-hole (16) have all been seted up to the both sides of casing (3), screen cloth (15) are all installed at the inside both ends of through-hole (16), and the inside position department that is located between two screen cloth (15) of through-hole (16) has revolving fragment (17) through pivot swing joint, the internally mounted of screen cloth (15) has sponge (18) that absorb water.

3. The LCL filter of a three-phase grid-connected inverter according to claim 1, wherein: the top of the cover plate (5) is provided with a groove matched with the bayonet lock (6), and the diameter of the cross section of the bayonet lock (6) is the same as that of the cross section of the groove.

4. The LCL filter of the three-phase grid-connected inverter according to claim 2, wherein: the side wall of the heat dissipation seat (2) is provided with a heat dissipation groove (1), and the heat dissipation groove (1) is located at the position below the binding post (7).

5. The LCL filter of a three-phase grid-connected inverter according to claim 1, wherein: a nameplate (10) is installed at the top of the cover plate (5), and a mounting seat is fixed on one side of the shell (3).