CN111509951A

CN111509951A - Frequency converter

Info

Publication number: CN111509951A
Application number: CN202010175060.2A
Authority: CN
Inventors: 向国庆; 刘忠; 陈武奇
Original assignee: Zhejiang Chengdian Electric Co ltd
Current assignee: ANDELI GROUP CO LTD
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2020-08-07
Anticipated expiration: 2040-03-13
Also published as: CN111509951B

Abstract

The invention discloses a frequency converter, which comprises a frequency converter body, wherein a heat dissipation notch is formed in the outer side of the frequency converter body, and an air inlet groove is formed in the bottom of the frequency converter body.

Description

Frequency converter

Technical Field

The invention relates to the technical field of industrial control, in particular to a frequency converter.

Background

A Variable-frequency Drive (VFD) is a power control device that applies frequency conversion technology and microelectronic technology to control an ac motor by changing the frequency of a working power supply of the motor.

The frequency converter mainly comprises a rectifying unit (alternating current to direct current), a filtering unit, an inverting unit (direct current to alternating current), a braking unit, a driving unit, a detecting unit, a micro-processing unit, a radiating unit and the like. The frequency converter adjusts the voltage and frequency of an output power supply by switching on and off an internal IGBT, provides the required power supply voltage according to the actual requirement of the motor, and further achieves the purposes of energy saving and speed regulation. With the continuous improvement of the industrial automation degree, the frequency converter is also widely applied.

Present converter mostly all adopts the branch cold to dispel the heat, and be equipped with air intake and thermovent, the air that externally ends gets into from the air intake, and discharge from the thermovent, current air intake adopts the structure of similar shutter mostly, can block partly great mosquito and large-scale foreign particles entering, add dustproof mesh enclosure in the partial shutter in addition, make the tiny particle dust also can't get into, but like this the dust adhesion is on dustproof mesh enclosure when can be, not handle the dust in time, can make the air let-in volume reduce for a long time, in addition in some areas that the rainwater is more, like regions such as quiet ripples, long-term rainfall back moisture is great, vapor content is more in the air, vapor mixes and can pass through the air intake entering in the air, make inside components and parts exist the condition emergence of the corruption of weing, for this, we propose the converter.

Disclosure of Invention

The present invention is directed to a frequency converter for preventing dust and moisture in the gas from entering the inside to cause corrosion damage, so as to solve the problems mentioned in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: the frequency converter comprises a frequency converter body, wherein a heat dissipation notch is formed in the outer side of the frequency converter body, an air inlet groove is formed in the bottom of the frequency converter body, and an air inlet filtering assembly used for preventing dust vapor from entering the interior is installed in the air inlet groove.

Preferably, the air inlet filter assembly includes the U shell, the baffle is all installed to U shell top and bottom, and installs the air inlet spare in the U shell, U shell port department is fixed with the mounting panel, and U shell tail end is through-hole plate structure, two the baffle inboard all is fixed with the baffling board, and the U shell inner wall is fixed with the guide plate.

Preferably, the air inlet piece includes driving motor and axis of rotation, the driving motor installation is fixed on U type shell lateral wall, and the driving motor output passes through shaft coupling and rotation axis connection, driving motor one end is kept away from in the axis of rotation and is passed through the bearing and is connected with U type shell inner wall rotation, and angular distribution such as the axis of rotation outside is fixed with a plurality of spiral pages.

Preferably, moisture absorption plates are attached to the outer sides of the baffle plates.

Preferably, the air inlet duct both sides are all opened there is the joint chamber, and the joint intracavity installs joint spare, joint spare is including fixed interior pole, fixed interior pole is fixed on joint intracavity wall, and the slip of fixed interior pole outer end has cup jointed flexible outer pole, the card hole has all been opened at the mounting panel both ends, the slip of flexible outer pole outer end runs through U type shell to with card hole joint, converter body low side corresponds joint chamber position and opens there is the adjustment tank, and adjustment tank and joint chamber intercommunication, flexible outer pole outside cover has the fixed plate, and fixed plate and joint intracavity wall sliding connection, fixed interior pole outside cover has the spring, and the spring both ends contact with fixed plate and joint intracavity wall respectively.

Preferably, an L shaped plate is fixed on the outer side of the fixing plate, and a L shaped plate is connected with the inner wall of the adjusting groove in a sliding manner.

Preferably, the mounting plate is fixed at the port of the U-shaped shell and is matched with the two baffles to divide the top and the bottom of the port of the U-shaped shell into an air inlet and an air outlet.

Preferably, a connecting plate is fixed to the back of the frequency converter body.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the air inlet filtering component is arranged at the bottom of the frequency converter body, so that a part of impurity particles can be prevented from entering the frequency converter body through the air inlet groove, meanwhile, through the matching of the two baffle plates and the guide plate in the air inlet filtering component, some impurity dust can be discharged from the air outlet, and the moisture absorption plate can be used for adsorbing water vapor contained in gas, so that the gas is prevented from being mixed with the water vapor, and the parts in the frequency converter are prevented from being corroded.

Drawings

FIG. 1 is a schematic view of the overall appearance structure of the present invention;

FIG. 2 is a partial cross-sectional structural schematic of the present invention;

FIG. 3 is a schematic view of a partially cut-away internal structure of the intake air filter assembly of the present invention;

FIG. 4 is a side cross-sectional structural schematic view of an intake air filter assembly of the present invention;

FIG. 5 is a schematic view of the connection between the clip member and the clip hole of the present invention;

FIG. 6 is an enlarged view taken at A in FIG. 2;

FIG. 7 illustrates the internal air intake path of the intake air filter assembly of the present invention.

In the figure, 1-a frequency converter body, 2-a heat dissipation notch, 3-an air inlet groove, 4-an air inlet filtering component, 5-a U-shaped shell, 6-a baffle, 7-an air inlet piece, 8-a mounting plate, 9-a baffle plate, 10-a guide plate, 11-a driving motor, 12-a rotating shaft, 13-a spiral leaf, 14-a moisture absorption plate, 15-a clamping cavity, 16-a clamping piece, 17-a fixed inner rod, 18-a telescopic outer rod, 19-a clamping hole, 20-an adjusting groove, 21-a fixing plate, 22-a spring, 23-an L-shaped plate, 24-an air inlet, 25-an air outlet and 26-a connecting plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, the frequency converter shown in the figure comprises a frequency converter body 1, a heat dissipation notch 2 is formed in the outer side of the frequency converter body 1, an internal hot air flow is discharged from the existing frequency converter body 1 through the heat dissipation notch 2, an air inlet tank 3 is formed in the bottom of the frequency converter body 1, the air inlet tank 3 mainly introduces external air flow and discharges the internal hot air flow, and an air inlet filtering assembly 4 for preventing dust and water vapor from entering the air inlet tank 3 is installed in the air inlet tank 3;

the air inlet filtering component 4 comprises a U-shaped shell 5, wherein baffles 6 are arranged at the top and the bottom of the U-shaped shell 5, a rectangular shell with a port is formed by combining the U-shaped shell 5 and the two baffles 6, the baffles 6 and the U-shaped shell 5 can be installed and disassembled through screw installation, an air inlet part 7 is installed in the U-shaped shell 5, an installation plate 8 is fixed at the port of the U-shaped shell 5, the tail end of the U-shaped shell 5 is of a through hole plate structure, baffle plates 9 are fixed on the inner sides of the two baffles 6, and a guide plate 10 is fixed on the inner wall of the U-shaped shell 5;

all having pasted the moisture absorption board 14 in the baffling board 9 outside, can realizing the absorption with the interior steam of inspiratory gas through the moisture absorption board 14, avoid moisture content more to adhere to inside the causing of converter body 1 and corrode.

The air inlet part 7 comprises a driving motor 11 and a rotating shaft 12, the driving motor 11 is fixedly installed on the side wall of the U-shaped shell 5, the output end of the driving motor 11 is connected with the rotating shaft 12 through a coupler, one end, far away from the driving motor 11, of the rotating shaft 12 is rotatably connected with the inner wall of the U-shaped shell 5 through a bearing, a plurality of spiral leaves 13 are fixed on the outer side of the rotating shaft 12 in an equal-angle distribution mode, the driving motor 11 rotates to drive the spiral leaves 13 to rotate, and therefore negative pressure suction force is generated;

the mounting plate 8 is fixed at the port of the U-shaped shell 5, the top and the bottom of the port of the U-shaped shell 5 are divided into an air inlet 24 and an air outlet 25 by matching with the two baffle plates 6, negative pressure suction is generated by rotation of the plurality of spiral leaves 13, other air is sucked from the air inlet 24, and meanwhile, gas with heavier impurity particles or moisture is discharged from the air outlet 25.

Clamping cavities 15 are formed in the two sides of the air inlet groove 3, clamping pieces 16 are arranged in the clamping cavities 15, the air inlet filtering component 4 is installed in the air inlet groove 3 by clamping the clamping piece 16 and the clamping hole 19, the clamping piece 16 comprises a fixed inner rod 17, the fixed inner rod 17 is fixed on the inner wall of the clamping cavity 15, and the outer end of the fixed inner rod 17 is sleeved with a telescopic outer rod 18 in a sliding manner, the two ends of the mounting plate 8 are both provided with clamping holes 19, the outer end of the telescopic outer rod 18 penetrates through the U-shaped shell 5 in a sliding manner, and is clamped with the clamping hole 19, the lower end of the frequency converter body 1 is provided with an adjusting groove 20 corresponding to the clamping cavity 15, and the adjusting groove 20 is communicated with the clamping cavity 15, the outer side of the telescopic outer rod 18 is sleeved with a fixing plate 21, the fixing plate 21 is connected with the inner wall of the clamping cavity 15 in a sliding mode, the spring 22 is sleeved on the outer side of the fixing inner rod 17, and two ends of the spring 22 are respectively in contact with the fixing plate 21 and the inner wall of the clamping cavity 15;

wherein, the fixed plate 21 outside is fixed with L template 23, and L template 23 and the inner wall sliding connection of adjustment tank 20, the convenient regulation to flexible outer lever 18.

In addition, the back of the frequency converter body 1 is fixed with a connecting plate 26, so that the frequency converter is convenient to mount with an equipment shell.

In the scheme, when the frequency converter body 1 is installed, the connecting plate 26 is horizontally installed, when the frequency converter is in operation, because the temperature is high, the heat dissipation part inside the frequency converter starts to dissipate heat, at the moment, the driving motor 11 rotates to drive the rotating shaft 12 and the spiral page 13 to rotate, so that air flow suction force is generated, at the moment, air enters through the air inlet 24 and sequentially collides and contacts with the surfaces of the two baffle plates 9, in the contact process, water vapor in the air can be adsorbed through the moisture absorption plate 14, so that the moisture content in the air is reduced, the corrosion in the frequency converter body 1 is avoided, through the two baffle plates 9, the initial speed of the air flow can be effectively reduced, and because dust particles in the air flow are heavy and can sink, the dust particles are gathered at the connecting part between the second baffle plate 9 and the baffle plate 6 and are matched with the guide plate 10 and the spiral page 13 to rotate, so that the, and the dustproof and moistureproof effect is achieved.

In the scheme, the type Y80M2-2 is preferably selected as the driving motor 11, the motor operation circuit is a normal and reverse rotation control program of a conventional motor, the circuit operation is a conventional circuit, the circuits and the control related in the invention are the prior art, and redundant description is not repeated herein.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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. Converter, including converter body (1), its characterized in that: the utility model discloses a converter body, including converter body (1), heat dissipation notch (2) are opened to the converter body (1) outside, and open converter body (1) bottom has intake stack (3), install in intake stack (3) and be used for preventing that dust steam from getting into inside air inlet filtering component (4).

2. The frequency converter of claim 1, wherein: air inlet filtering component (4) include U shell (5), baffle (6) are all installed to U shell (5) top and bottom, and install air inlet spare (7) in U shell (5), U shell (5) port department is fixed with mounting panel (8), and U shell (5) tail end be the through-hole plate structure, two baffle (6) inboard all is fixed with baffling board (9), and U shell (5) inner wall is fixed with guide plate (10).

3. The frequency converter of claim 2, wherein: air inlet spare (7) include driving motor (11) and axis of rotation (12), driving motor (11) installation is fixed on U shell (5) lateral wall, and driving motor (11) output passes through the shaft coupling and is connected with axis of rotation (12), driving motor (11) one end is kept away from in axis of rotation (12) and is passed through bearing and U shell (5) inner wall rotation connection, and angular distribution such as axis of rotation (12) outside is fixed with a plurality of spiral pages (13).

4. The frequency converter of claim 1, wherein: and moisture absorption plates (14) are adhered to the outer sides of the baffle plates (9).

5. The frequency converter of claim 3, wherein: the utility model discloses a flexible converter, including air inlet duct (3), air inlet duct (3) both sides all open joint chamber (15), and install joint spare (16) in the joint chamber (15), joint spare (16) are including fixed interior pole (17), fixed interior pole (17) are fixed on joint chamber (15) inner wall, and the slip of fixed interior pole (17) outer end has cup jointed flexible outer pole (18), card hole (19) have all been opened at mounting panel (8) both ends, slip of flexible outer pole (18) outer end runs through U type shell (5) to with card hole (19) joint, converter body (1) low side corresponds joint chamber (15) position and has opened adjustment tank (20), and adjustment tank (20) and joint chamber (15) intercommunication, flexible outer pole (18) outside cover has fixed plate (21), and fixed plate (21) and joint chamber (15) inner wall sliding connection, fixed interior pole (17) outside cover has spring (22), and two ends of the spring (22) are respectively contacted with the fixing plate (21) and the inner wall of the clamping cavity (15).

6. The frequency converter according to claim 1, wherein L-shaped plates (23) are fixed on the outer side of the fixing plate (21), and L-shaped plates (23) are slidably connected with the inner wall of the adjusting groove (20).

7. The frequency converter of claim 1, wherein: mounting panel (8) are fixed in U shell (5) port department to two baffles (6) of cooperation divide into air intake (24) and air outlet (25) with U shell (5) port top and bottom.

8. The frequency converter of claim 1, wherein: and a connecting plate (26) is fixed on the back of the frequency converter body (1).