CN201365189Y - Detachable ventilating filter device of high voltage inverter - Google Patents

Abstract

The utility model discloses a ventilation filtering device used for a high-voltage frequency converter, more precisely, it is a ventilation filtering net device with simple structure, convenient installation and disassembly, and high safety performance. The device is composed of blinds, air filters, magnetic steel sheets, magnetic steel sheet fixing parts, shutter hanging parts and other parts. The magnetic steel sheet is fixed on the upper end of the shutter frame through the magnetic steel sheet fixing piece, and the shutter hook is located at the lower end of the shutter. The air filter is placed in the louver cavity and can be automatically pressed between the louver and the metal isolation net of the cabinet door without special fixing. The filter screen device and the high-voltage inverter cabinet door are connected by the lower-end hook and the upper-end magnetic steel adsorption force, without screws, easy to install and disassemble, and high in safety performance.

Description

A detachable high-voltage inverter ventilation filter device

technical field

The utility model relates to an easily detachable device for an air ventilation filter net, in particular to a ventilation filter device which can be fixed without any screws and has good ventilation and filtering effects for a high-voltage frequency converter.

Background technique

High-voltage frequency converters are required to have extremely high reliability in industrial production fields such as electric power, chemical industry, coal mines, and metallurgy. There are many reliability indicators that affect the high-voltage inverter, among which heat dissipation and ventilation are a crucial link in the design process. At present, high-voltage inverters have various methods such as high-low-high type, direct series of components, mid-point clamped multi-level type, unit cascade type, etc. Generally speaking, the efficiency of the above-mentioned high-voltage inverters Generally, it can reach 96-98%. However, due to the high power of the equipment, a large amount of heat is still generated during normal operation. In order to ensure the normal operation of the equipment, it is very necessary to dissipate a large amount of heat, optimize the heat dissipation and ventilation scheme, carry out reasonable design and calculation, and realize the efficient heat dissipation of the equipment to improve the reliability of the equipment.

The power of high-voltage inverter equipment is relatively large, and 4% of the power loss is mainly lost in the operating environment in the form of heat. If the temperature problem of the working environment of the inverter room cannot be solved in a timely and effective manner, it will directly endanger the operation safety of the inverter itself; eventually, the overheating protection action of the inverter will trip due to the high temperature. In order to ensure a good operating environment for the inverter, measures must be taken to control the temperature of the inverter and the operating environment.

At present, the most widely used in frequency converter products is the forced air cooling method, which uses the flow of air to take away heat. However, due to air pollution, there are a lot of dust and small particles in the atmosphere. If too much dust and particles enter the inverter, it will bring great trouble to the safety and stability of the high-voltage inverter. Therefore, when forced air cooling , In order to prevent the dust in the air from affecting the device system, a ventilation air filter is generally added at the air inlet. The ventilation filter should be disassembled and cleaned frequently to prevent the long-term accumulation of air dust from affecting the air volume. Usually, the ventilation filter screen of the high-voltage frequency converter is fixed on the internal bracket of the frequency converter with screws. When cleaning and replacing the filter screen, it must be shut down and powered off to prevent personal electric shock accidents. In this way, it is inevitable to have a certain impact on the user's production and economic losses.

Contents of the invention

The purpose of the utility model is to solve the above-mentioned problem of dismantling the ventilation filter screen of the high-voltage frequency converter, so as to provide a new method for easy disassembly of the air filter screen. When the user is using the high-voltage inverter, the ventilation filter can be replaced and cleaned without shutting down or power-off.

The concrete technical scheme of the utility model is as follows:

A detachable ventilation filter device for a high-voltage frequency converter, said ventilation filter device comprising a high-voltage frequency converter cabinet, a high-voltage frequency converter cabinet door, shutters, an air filter, a metal isolation net for a high-voltage cabinet door, and an air outlet, characterized in that:

The inner side of the high-voltage inverter cabinet door is provided with a high-voltage cabinet door metal isolation net, and shutters are installed on the outer side of the high-voltage inverter cabinet door relative to the high-voltage cabinet door metal isolation net, and the shutters face the high-voltage cabinet door. An air filter is arranged on one side of the isolation net, and the door of the high-voltage frequency converter cabinet is used as an air vent of the ventilation filter device; an air outlet is opened on the upper side of the high-voltage frequency converter cabinet.

The ventilation filtering device further includes a magnetic steel sheet and a magnetic steel sheet fixing part, and the magnetic steel sheet is fixed on both sides of the upper part of the shutter frame through the magnetic steel sheet fixing part, and the magnetic steel sheet fixing part is connected with the shutter Fixedly connected, the air filter is fixed on the shutter through the adsorption of the magnetic steel sheet.

The ventilation filtering device further includes two louver hooks, the louver hangers are fixed on both sides of the lower part of the louver frame, and the louver 4 hooks are used to hang the louvers to the high-voltage cabinet On the door.

The ventilation filtering device described in the utility model is installed outside the cabinet, and can be firmly adsorbed on the cabinet door only through the hooks on the lower frame of the louver and the upper end through the magnetic steel sheet, without using a screw, to avoid Accidents caused by falling screws are avoided, so installation and removal do not require any tools, which greatly improves efficiency. The air filter can have a good dust-proof effect on the internal equipment of the high-voltage inverter, and it is convenient to disassemble and clean the internal parts of the device when the equipment is running. The vent metal isolation net fixed on the high-voltage cabinet door can prevent limbs from entering the cabinet when removing and replacing the filter, ensuring safety during work.

Description of drawings

Figure 1 is a perspective view of a high-voltage inverter high-voltage cabinet;

Figure 2 is an assembly diagram between the ventilation filter device and the cabinet;

Fig. 3 is the schematic diagram of the fixing method of the magnetic steel sheet of the present invention;

Fig. 4 is a schematic diagram of a method for fixing a blind hanger.

In the attached drawings of the manual, 1-cabinet side panel, 2-air outlet, 3-high voltage cabinet door metal isolation net, 4-louver, 5-high voltage cabinet door, 6-air filter, 7-magnetic steel sheet, 8 -Magnet sheet fixing piece, 9-Blind holding piece.

Detailed ways

Below, according to the accompanying drawings of the description, the technical solution of the present utility model is described in further detail.

The high-voltage frequency converter ventilation filtering device described in the utility model is mainly composed of a shutter 4, an air filter 6, a magnetic steel sheet 7, a magnetic steel sheet fixing part 8, and a blind hanging part 9. The magnetic steel sheet 7 is fixed on both sides of the upper part of the shutter 4 frame through the magnetic steel sheet fixing part 8; the lower part of the filter screen device is hung on the high-voltage frequency converter high-voltage cabinet door 5 through two hooks 9, and the upper part is passed through two magnetic steel sheets The magnetic force of 7 is absorbed on the main cabinet door of the high-voltage frequency converter;

The side plate 1 of the high-voltage inverter cabinet shown in Figure 1 is a closed structure, the shutter 4, the metal isolation net 3 of the vent, and the air outlet 2 constitute the air duct of the high-voltage cabinet, and the air filter 6 is located in the metal isolation between the shutter 4 and the vent Between the nets 3, when the high-voltage inverter is running normally, a centrifugal fan is installed outside the air outlet 2 to draw air from the inside of the cabinet, and the cold air passes through the shutter 4, the air filter 6, the metal isolation net 3 of the cabinet door, the cabinet inner cavity and is drawn from the outlet. The tuyere 2 is excluded from the cabinet. Since the filter is located at the air inlet, it can effectively filter out the dust in the air.

As shown in Fig. 2, the assembly diagram between the ventilation filter device and the cabinet, the high-voltage cabinet door metal isolation net 3 is arranged on the inner side of the high-voltage inverter cabinet door 5, and the metal isolation net 3 of the high-voltage inverter cabinet door 5 is opposite to the high-voltage cabinet door metal isolation net 3. Shutters 4 are installed on the outside, and an air filter 6 is arranged on the side of the shutters 4 facing the metal isolation net 3 of the high-voltage cabinet door.

The magnetic steel sheet 7 shown in FIG. 3 is fixed on the upper part of the louver 4 through the magnetic steel sheet fixing part 8, and there are two pieces in total, which are placed and fixed on both sides of the louver 4 symmetrically. A riveting method is adopted between the magnetic steel sheet fixing part 8 and the shutter 4.

The lower frame of the louver 4 shown in Fig. 4 is fixed with a hook 9 for fixing between the lower part of the louver 4 and the high-voltage cabinet door 5, and the installation method is also riveted.

When the high-voltage inverter is running, the fan outside the air outlet 2 draws air outwards, and the cold air passes through the shutter 4, the air filter 6, the metal isolation net 3 of the cabinet door, and the inner cavity of the cabinet, and is discharged from the cabinet by the air outlet 2, and the air in the high-voltage cabinet is exhausted. Bring out the heat. The air filter sheet 6 positioned at the air inlet filters out the dust in the air to ensure the cleanliness in the cabinet.

When installing, put the air filter 6 into the cavity of the louver 4 first, then hang the hook at the lower end of the louver on the cabinet door 5 at an angle of 45 degrees, and push the upper end with a little force until the louver 4 is adsorbed by the magnetic steel sheet Just let go on the door panel. When the air filter 6 needs to be replaced or cleaned, the shutter 4 is pulled out with a little force, and when it is about 45 degrees with the cabinet door, it is upwardly proposed. The air filter can be reused after cleaning and drying.

To sum up, the utility model replaces the cumbersome devices such as screws and springs with magnetic steel, so that the air filter device is easy to disassemble. Objects fall into the high-voltage inverter cabinet, thereby avoiding damage to equipment and preventing accidents.

The scheme that the magnet steel of the ventilation filter screen of the high-voltage frequency converter of the utility model described above is easy to disassemble is only a better method of the utility model, and any equivalent transformation of the technical solution of the utility model belongs to the protection scope of the utility model within.

Claims (5)

1, a kind of ventilation filter of dismountable high voltage converter, described ventilation filter comprise high voltage converter cabinet, high voltage converter cabinet door, shutter, air filter disc, high-voltage board door metal separation net, air outlet, it is characterized in that:

The inboard of described high voltage converter cabinet door is provided with high-voltage board door metal separation net, shutter is installed in the outside with respect to high-voltage board door metal separation net at described high voltage converter cabinet door, towards a side of described high-voltage board door metal separation net the air filter disc is set at described shutter, described high voltage converter cabinet door is as the ventilating opening of this ventilation filter; Upside at described high voltage converter cabinet has air outlet.

2, ventilation filter according to claim 1, it is characterized in that, this ventilation filter also further comprises magnetic links, magnetic links fixture, described magnetic links is fixed on the framework upper both sides of shutter by described magnetic links fixture, described magnetic links fixture is fixedlyed connected with described shutter, and described air filter disc is by on the described shutter of being absorbed and fixed at of described magnetic links.

3, ventilation filter according to claim 2 is characterized in that, it is characterized in that, described magnetic links fixture is fixed on the described shutter by riveted way.

4, ventilation filter according to claim 1, it is characterized in that, described ventilation filter also further comprises two shutter hanging parts, described shutter hanging part is fixed on the both sides, bottom of the framework of described shutter, by described shutter (4) hanging part shutter is articulated on the described high-voltage board door.

5, ventilation filter according to claim 4 is characterized in that, described shutter hanging part is fixed on the described shutter by riveted way.

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