CN215817894U - Novel frequency converter - Google Patents

Abstract

The utility model relates to the technical field of frequency converters, in particular to a novel frequency converter, which comprises: the fan comprises a shell, a fan body and a fan cover, wherein a first cavity and a second cavity are formed in the shell, a radiator and a fan are arranged in the first cavity, and an electronic component is arranged in the second cavity; the cavity wall of the second cavity is provided with a through hole for air circulation, and a heat-conducting plate is covered on the through hole. According to the utility model, the through hole for air circulation is formed in the cavity wall of the second cavity, and the heat conducting plate is covered on the through hole, so that heat exchange is realized.

Description

Novel frequency converter

Technical Field

The utility model relates to the technical field of frequency converters, in particular to a novel frequency converter.

Background

The frequency converter is an electric control device which applies frequency conversion technology and microelectronic technology and controls an alternating current motor by changing the frequency mode of a working power supply of the motor. The internal space of the frequency converter is divided into a two-layer cavity or a three-layer cavity structure, wherein a radiator and a fan are arranged in one cavity and mainly used for radiating heat of a capacitor of a circuit board and the back surface of the circuit board, a plurality of electronic components are arranged on the front surface of the circuit board and are arranged in the other cavity, and the cavity is usually closed. The inventor researches and discovers that in the using process of the frequency converter, some heat needs to be dissipated on the front face of the circuit board, and the existing closed cavity is difficult to dissipate heat.

For example, patent No. 2019100279135 entitled inverter is an invention patent for improving the waterproof performance, space utilization and reliability of an inverter, but it is known from the drawings attached to the specification of the patent that a circuit board unit is provided at the middle part and a heat dissipation structure is provided at the back side of the circuit board unit, and there is no heat dissipation structure for the front side of the circuit board unit.

Disclosure of Invention

The utility model aims to provide a novel frequency converter, which is characterized in that through holes for air circulation are formed in the cavity wall of a second cavity, and a heat conducting plate covers the through holes, so that electromagnetic interference is shielded while heat exchange is realized, and the problem of poor heat dissipation of the front side of the conventional circuit board is solved.

The purpose of the utility model is realized as follows:

a novel frequency converter, comprising:

the fan comprises a shell, a fan body and a fan cover, wherein a first cavity and a second cavity are formed in the shell, a radiator and a fan are arranged in the first cavity, and an electronic component is arranged in the second cavity;

the cavity wall of the second cavity is provided with a through hole for air circulation, and a heat-conducting plate is covered on the through hole.

Preferably, the housing comprises a main housing, a base and a connecting frame positioned between the main housing and the base, and an electronic component is arranged between the connecting frame and the main housing;

the first cavity is arranged between the bottom of the connecting frame and the base, the second cavity is arranged between the bottom of the main shell and the connecting frame, the through hole is arranged at the bottom of the main shell, the heat-conducting plate is arranged on the main shell, and the heat-conducting plate covers the through hole.

Preferably, the main housing is provided with a placing groove, the bottom of the placing groove is provided with the through hole, and the heat conducting plate is placed in the placing groove;

or/and the main shell is provided with a limiting column at one side of the through hole, the heat conducting plate is provided with a mounting hole, and the limiting column is positioned in the mounting hole;

or/and the main casing body is provided with a mounting groove, the heat conducting plate extends downwards to be provided with a mounting plate, and the mounting plate is placed in the mounting groove and is connected with the main casing body through a first fastening piece.

Preferably, the main shell and the heat conducting plate are respectively provided with a first connecting hole and a second connecting hole, and a second fastening piece penetrates through the first connecting hole and the second connecting hole so as to realize the connection between the main shell and the heat conducting plate.

Preferably, the main casing body side is seted up and is used for the opening of external connection to it has a plurality of binding post to embed, the main casing body is provided with the dust-proof box in binding post one side to thereby the dust-proof box covers at the opening part and is used for dustproof.

Preferably, the two sides of the dust-proof box are provided with connecting plates, the main shell is internally provided with connecting grooves, and the connecting plates are positioned in the connecting grooves;

or/and the bottom of the dustproof box is provided with an assembling plate, and a third fastener penetrates through the assembling plate and the side wall of the connecting frame so as to connect the dustproof box and the connecting frame;

and the connecting frame is provided with a mounting frame, one end of the mounting frame extends out and is exposed outside the connecting frame, and a fastening piece IV penetrates through the bottom of the dust-proof box and the mounting frame so as to connect the dust-proof box and the connecting frame.

Preferably, the two sides of the bottom of the connecting frame are provided with limiting rods, the two sides of the top of the base are provided with assembling holes, and the bottoms of the limiting rods are located in the assembling holes.

Preferably, link bottom integrated into one piece has the staple bolt, and electronic components includes the electric capacity board, the electric capacity board is provided with a plurality of electric capacity downwards, and the electric capacity bottom is located the staple bolt to be provided with the sealing washer between electric capacity and the staple bolt.

Preferably, the electronic component further comprises an IGBT board and a driving board, and the IGBT board is connected with the driving board and the driving board is connected with the capacitor board through pins.

Preferably, main casing body top is provided with flip, and flip one end both sides are provided with buckle two, and the flip other end symmetry is provided with the joint piece, the main casing body corresponds buckle two and joint piece and has seted up joint interface two and joint interface three respectively.

Compared with the prior art, the utility model has the outstanding and beneficial technical effects that:

1. according to the utility model, the through hole for air circulation is formed in the cavity wall of the second cavity, and the heat conducting plate covers the through hole, so that electromagnetic interference is shielded while heat exchange is realized.

2. The dustproof box is covered at the opening so as to prevent dust, and further, the occurrence rate of machine faults is reduced.

3. According to the utility model, the bottom of the limiting rod is positioned in the assembling hole, so that the positioning before screw connection is realized, the screw pre-locking process is omitted, and the production and assembly efficiency is greatly improved.

4. The utility model reduces the assembling steps through the integral design of the hoop and the connecting frame, thereby effectively fixing and protecting the capacitor. And through the setting of sealing washer to can effectually prevent inside entering cavity of flying dust, foreign matter etc. and then protect electronic components's region and promote the dustproof effect of converter.

5. The utility model beautifies the interior of the cavity and reduces the wiring fault rate by the mode of pin header connection.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of a structure related to the dust cover.

Fig. 3 is a schematic structural view of the dust cover.

Fig. 4 is a schematic diagram of a structure related to a flip cover.

Fig. 5 is an enlarged schematic view of a in fig. 4.

Fig. 6 is a schematic diagram of a structure related to a heat-conducting plate.

Fig. 7 is a schematic structural view of the lower part of the main housing.

Fig. 8 is a schematic structural diagram of the connector and the base.

Fig. 9 is a schematic view of the structure of the connector.

Fig. 10 is a schematic structural view of an electronic component.

Fig. 11 is a schematic diagram of a structure related to a capacitor plate.

Fig. 12 is a schematic view of the structure inside the base.

Reference numerals: 1-a main housing; 11-a through hole; 12-placing a groove; 13-a limiting column; 14-mounting grooves;

15-connecting the hole I; 16-opening; 17-a connecting trough; 171-ribs; 18-card interface one;

191-card interface two; 192-card interface three; 2-a base; 21-assembling holes; 22-a fan; 23-a heat sink;

24-an air guide; 3-a connecting frame; 31-a mounting frame; 32-a limiting rod; 33-anchor ear; 34-buckling one;

35-a baffle; 36-a groove; 4-electronic components; 41-capacitor plate; 411-capacitance; 42-IGBT board;

43-a drive plate; 44-an EMC board; 5-heat conducting plate; 51-mounting holes; 52-a mounting plate; 53-connecting hole two;

55-bending a plate; 6-a wiring terminal; 7-a dustproof box; 71-a connecting plate; 72-assembling the plate; 73-a wiring portion;

74-an auxiliary plate; 8-arranging needles; 9-a flip cover; 91-fastener II; 92-a clamping block.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 12, and particularly in fig. 6, a novel frequency converter includes: the casing, and the casing is inside to be seted up first cavity and second cavity, wherein radiator 23 and fan 22 are placed to the first cavity embeds and electronic components 4 is placed to the second cavity. And the cavity wall of the second cavity is provided with a through hole 11 for air circulation, and the through hole 11 is covered with a heat conducting plate 5.

Therefore, in the actual use process, the through hole 11 for air circulation is formed on the cavity wall of the second cavity, the heat conduction plate 5 is a shielding plate, and the heat conduction plate 5 covers the through hole 11, so that the heat exchange is realized and the electromagnetic interference is shielded at the same time.

The casing can be become by two parts or a plurality of parts simultaneously, and first cavity and second cavity can be about or from top to bottom, and the position is indefinite promptly, just all sets up the through-hole 11 that is used for the circulation of air to it has heat-conducting plate 5 to cover on through-hole 11, thereby realizes the heat dissipation.

For example, as shown in fig. 6, the housing includes a main housing 1, a base 2, and a connecting frame 3 located therebetween, and an electronic component 4 is disposed between the connecting frame 3 and the main housing 1. Wherein the first cavity is arranged between the bottom of the connecting frame 3 and the base 2, and the second cavity is arranged between the bottom of the main shell 1 and the connecting frame 3.

Meanwhile, the through hole 11 is formed in the bottom of the main shell 1, the heat conducting plate 5 is arranged on the main shell 1, and the heat conducting plate 5 covers the through hole 11. Therefore, in the actual use process, the through hole 11 for air circulation is opened on the main casing 1, the heat conducting plate 5 is a shielding plate, and the heat conducting plate 5 covers the through hole 11, thereby realizing heat exchange and shielding electromagnetic interference.

While the electronic component 4 comprises an EMC board 44, wherein EMC refers to the ability of a device or system to operate satisfactorily in its electromagnetic environment without generating intolerable electromagnetic interference to any device in its environment. And the heat conductive plate 5 is a shield plate, the heat conductive plate 5 is positioned above the EMC board 44, thereby improving EMC compatibility.

And the internal structure of the base 2 is: first, a radiator 23 is built in the base 2, a fan 22 and a grid plate are respectively provided on both sides of the radiator 23, and an air guide 24 is provided between the fan 22 and the radiator 23.

Therefore, in the actual use process, a hollow frame is further disposed outside the fan 22, the inside and outside air is circulated through the grating plate and the hollow frame, and the inside and outside air is circulated through the fan 22 and the air guide 24.

As shown in fig. 4 and 6, the heat-conducting plate 5 has various mounting structures, and a single connection manner or a combination of multiple connection manners can be adopted, so as to improve the connection stability.

The first method comprises the following steps: the main casing 1 is provided with a placement groove 12, the bottom of the placement groove 12 is provided with the through hole 11, and the heat conducting plate 5 is placed in the placement groove 12.

And the second method comprises the following steps: the main casing 1 is provided with a spacing column 13 at one side of the through hole 11, and the heat-conducting plate 5 is provided with a mounting hole 51, and the spacing column 13 is located in the mounting hole 51 so as to connect the heat-conducting plate 5 and the main casing 1.

And the third is that: the main casing 1 is opened with a mounting groove 14, and the heat conducting plate 5 extends downwards to be provided with a mounting plate 52, and the mounting plate 52 is placed in the mounting groove 14 and connected with the main casing 1 through a first fastening member. One of the fasteners is a screw or a bolt.

And fourthly: two combinations of the first three or the combination of the first three are adopted.

Meanwhile, in order to make the connection more stable, the main housing 1 and the heat conducting plate 5 are respectively provided with a first connecting hole 15 and a second connecting hole 53, and a second fastening piece passes through the first connecting hole 15 and the second connecting hole 53 to realize the connection between the main housing 1 and the heat conducting plate 5.

The second fastening piece is a screw or a bolt, and the like, and also penetrates through the bent plate 55, so that the electric wire can pass through the second fastening piece conveniently, and the electric wire can be limited.

As shown in fig. 1 to 3, an opening 16 for external connection is opened at a side of the main housing 1, and a plurality of connection terminals 6 are built in the main housing 1, and a dust-proof box 7 is provided at one side of the connection terminals 6 of the main housing 1, and the dust-proof box 7 covers the opening 16 for dust prevention.

Therefore, in the actual use process, the dust-proof box 7 covers the opening for dust prevention, and the machine failure rate is reduced. Meanwhile, the dust-proof case 7 has a certain thickness, so that dust is accumulated in the dust-proof case 7 even if it enters, and does not directly reach the connection terminal 6.

Meanwhile, since only the dust box 7 is provided, there is a certain gap for the electric wire to enter when the electric wire is connected externally, and therefore the dust box 7 is provided with a wire connecting portion 73 for the electric wire to pass through. Wherein wiring portion 73 is the connector lug, thereby it is sealed that prior art and built-in have similar structure that seals up promptly and realize, therefore also can the external connection when realizing dustproof, improves sealed effect moreover.

As shown in fig. 1 to 9, the dust-proof box 7 has various mounting structures, and can be connected in a single manner or in combination of multiple manners, so as to improve the connection stability.

The first method comprises the following steps: both sides of the dustproof box 7 are provided with connecting plates 71, the connecting grooves 17 are formed in the main casing 1, and the connecting plates 71 are located in the connecting grooves 17 to realize connection between the dustproof box 7 and the main casing 1.

In order to make the connection more stable, the connecting slot 17 is designed to be U-shaped, and the two sides of the inner wall of the connecting slot 17 are formed with protruding strips 171 protruding inwards, and the protruding strips 171 at the two sides are located at the front and rear sides of the connecting plate 71.

And the second method comprises the following steps: the bottom of the dustproof box 7 is provided with an assembling plate 72, and a fastener III penetrates through the assembling plate 72 and the side wall of the connecting frame 3 so as to connect the dustproof box 7 and the connecting frame 3. And the third fastener is a screw or a bolt and the like.

And in order to make the connection more stable, a subsidiary plate 74 is placed before the assembling plate 72, and the fastening members three pass through the subsidiary plate 74, the assembling plate 72 and the side wall of the connecting frame 3 in this order, thereby connecting the dust box 7 and the connecting frame 3.

And the third is that: the connecting frame 3 is provided with a mounting frame 31, one end of the mounting frame 31 extends out and is exposed outside the connecting frame 3, and a fastening member four penetrates through the bottom of the dust-proof box 7 and the mounting frame 31 so as to connect the dust-proof box 7 and the connecting frame 3. The fourth fastener is a screw or a bolt.

Meanwhile, in the mounting structure for placing the mounting frame 31, firstly, the bottom of the connecting frame 3 is provided with the groove 36, the mounting frame 31 is placed in the groove 36 and connected with the connecting frame 3 through screws or bolts, and one end of the mounting frame 31 extends out and is exposed outside the connecting frame 3.

And fourthly: two combinations of the first three or the combination of the first three are adopted.

As shown in fig. 8-9, two sides of the bottom of the connecting frame 3 are provided with the limiting rods 32, two sides of the top of the base 2 are provided with the assembling holes 21, and the bottom of the limiting rods 32 is located in the assembling holes 21, so that the connecting and limiting between the connecting frame 3 and the base 2 are realized.

Therefore, in the actual use process, the screw pre-locking process is needed due to the adoption of the screw connection, but the positioning before the screw connection is realized through the arrangement of the limiting rod 32 and the assembling hole 21, so that the screw pre-locking process is omitted, and the production and assembly efficiency is greatly improved.

In addition, in order to make the connection more stable and limit, the front and rear bottom portions of the connecting frame 3 are provided with baffles 35 extending downwards, and the baffles 35 abut against the front and rear top portions of the base 2.

As shown in fig. 7-12, in the structure of the connecting frame 3, firstly, the hoop 33 is integrally formed at the bottom of the connecting frame 3, and the electronic component 4 includes a capacitor plate 41, and the capacitor plate 41 is provided with a plurality of capacitors 411 downward, and the bottoms of the capacitors 411 are located in the hoop 33, and a sealing ring is provided between the capacitors 411 and the hoop 33.

Therefore, in the actual use process, the hoop 33 and the connecting frame 3 are integrally formed, so that the assembling steps are reduced, and the capacitor 411 can be effectively fixed and protected. And through the setting of sealing washer to can effectually prevent inside entering cavity of flying dust, foreign matter etc. and then protect electronic components 4's region and promote the dustproof effect of converter.

Meanwhile, the electronic component 4 further comprises an IGBT board 42 and a driving board 43, and the IGBT board 42 and the driving board 43 and the capacitance board 41 are connected by pins 8.

Therefore, in the actual use process, the inner part of the cavity is attractive and the wiring failure rate is reduced by the mode of pin header 8 connection. The pin header 8 is generally widely used for connecting a PCB board, and has the name of a universal connector.

Meanwhile, the IGBT is an insulated gate bipolar transistor, is a composite fully-controlled voltage-driven power semiconductor device consisting of a BJT (bipolar junction transistor) and an MOS (insulated gate field effect transistor), and has the advantages of both high input impedance of the MOSFET and low conduction voltage drop of the GTR. And the IGBT forms a channel by adding forward grid voltage, and provides base current for a PNP (originally NPN) transistor to enable the IGBT to be conducted.

And drive plate 43 mainly amplifies six way pulse usefulness that the CPU mainboard sent, generally realizes by the opto-coupler, for example PC923, and the opto-coupler output amplifies the isolation pulse and goes to trigger IGBT board 42, and then realizes the chopper to become the alternating current to direct current, still have detection circuitry such as switching power supply and excessive pressure overcurrent overheat on general drive plate 43 in addition.

As shown in fig. 4 to 12, the connection between the connection frame 3 and the main casing 1 is: first, the two sides of the top of the connecting frame 3 are provided with the first buckles 34, the two sides of the bottom of the main shell 1 are provided with the first clamping interfaces 18, and the first buckles 34 are clamped in the first clamping interfaces 18, so that the connecting frame 3 and the main shell 1 are connected.

As shown in fig. 1 to 4, the main housing 1 is provided with a flip cover 9 at the top, and the flip cover 9 serves to protect the internal components while also facilitating the maintenance and replacement of the internal components.

Meanwhile, the structure of the flip cover 9 is as follows: first, 9 one end both sides of flip are provided with buckle two 91, and the symmetry of flip 9 other end is provided with joint piece 92, and main casing body 1 corresponds buckle two 91 and joint piece 92 and has seted up joint interface two 191 and joint interface three 192 respectively simultaneously, through the cooperation of buckle two 91 and joint interface two 191, and joint piece 92 and the cooperation of joint interface three 192 to set up flip 9 on main casing body 1.

The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. While the present invention is not limited to the above-described embodiments, various changes and modifications may be made without departing from the spirit and scope of the utility model, and these changes and modifications are intended to be included within the scope of the utility model as claimed.

Claims (10)

1. A novel frequency converter is characterized by comprising:

the fan comprises a shell, a first cavity and a second cavity are formed in the shell, a radiator (23) and a fan (22) are arranged in the first cavity, and an electronic component (4) is arranged in the second cavity;

the cavity wall of the second cavity is provided with a through hole (11) for air circulation, and a heat conducting plate (5) is covered on the through hole (11).

2. The novel frequency converter according to claim 1, characterized in that: the shell comprises a main shell (1), a base (2) and a connecting frame (3) positioned between the main shell and the base, and an electronic component (4) is arranged between the connecting frame (3) and the main shell (1);

seted up between link (3) bottom and base (2) first cavity, and seted up between main casing body (1) bottom and link (3) the second cavity, main casing body (1) bottom has been seted up through-hole (11) to be provided with on main casing body (1) heat-conducting plate (5) to heat-conducting plate (5) cover is on through-hole (11).

3. The novel frequency converter according to claim 2, characterized in that: the main shell (1) is provided with a placing groove (12), the bottom of the placing groove (12) is provided with the through hole (11), and the heat conducting plate (5) is placed in the placing groove (12);

or/and a limiting column (13) is arranged on one side of the through hole (11) of the main shell (1), the heat conducting plate (5) is provided with a mounting hole (51), and the limiting column (13) is positioned in the mounting hole (51);

or/and the main shell body (1) is provided with a mounting groove (14), the heat conducting plate (5) extends downwards to be provided with a mounting plate (52), and the mounting plate (52) is placed in the mounting groove (14) and is connected with the main shell body (1) through a first fastening piece.

4. The novel frequency converter according to claim 3, characterized in that: the main shell (1) and the heat conducting plate (5) are respectively provided with a first connecting hole (15) and a second connecting hole (53), and a second fastening piece penetrates through the first connecting hole (15) and the second connecting hole (53) so as to realize the connection between the main shell (1) and the heat conducting plate (5).

5. The novel frequency converter according to any one of claims 2-4, characterized in that: the utility model discloses a dustproof wireless switch, including main casing body (1), main casing body (1) side is seted up opening (16) that are used for the external connection to it has a plurality of binding post (6) to embed, main casing body (1) is provided with dust-proof box (7) in binding post (6) one side to thereby dust-proof box (7) cover is located opening (16) and is used for dustproof.

6. The novel frequency converter according to claim 5, characterized in that: connecting plates (71) are arranged on two sides of the dustproof box (7), a connecting groove (17) is formed in the main shell (1), and the connecting plates (71) are located in the connecting groove (17);

or/and an assembly plate (72) is arranged at the bottom of the dustproof box (7), and a third fastener penetrates through the assembly plate (72) and the side wall of the connecting frame (3) so as to connect the dustproof box (7) and the connecting frame (3);

or/and the connecting frame (3) is provided with a mounting frame (31), one end of the mounting frame (31) extends out and is exposed outside the connecting frame (3), and a fastening piece IV penetrates through the bottom of the dustproof box (7) and the mounting frame (31), so that the dustproof box (7) and the connecting frame (3) are connected.

7. The novel frequency converter according to any one of claims 2-4, characterized in that: limiting rods (32) are arranged on two sides of the bottom of the connecting frame (3), assembling holes (21) are formed in two sides of the top of the base (2), and the bottoms of the limiting rods (32) are located in the assembling holes (21).

8. The novel frequency converter according to claim 2, characterized in that: link (3) bottom integrated into one piece has staple bolt (33), and electronic components (4) include capacitor plate (41), capacitor plate (41) are provided with a plurality of electric capacity (411) downwards, and electric capacity (411) bottom is located staple bolt (33) to be provided with the sealing washer between electric capacity (411) and staple bolt (33).

9. The novel frequency converter according to claim 8, characterized in that: the electronic component (4) further comprises an IGBT board (42) and a driving board (43), and the IGBT board (42) is connected with the driving board (43) and the driving board (43) is connected with the capacitance board (41) through a pin header (8).

10. The novel frequency converter according to any one of claims 2-4, characterized in that: main casing body (1) top is provided with flip (9), and flip (9) one end both sides are provided with buckle two (91), and flip (9) other end symmetry is provided with joint piece (92), joint interface two (191) and joint interface three (192) have been seted up respectively to main casing body (1) corresponding buckle two (91) and joint piece (92).

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