CN218769513U - A cooling device for high-power thyristor chains suitable for rail transit - Google Patents

Abstract

The utility model discloses a cooling device for a high-power thyristor chain suitable for rail traffic, which comprises a radiator group composed of several radiators arranged side by side, and the high-power thyristor chain is fixed on the outside of each radiator On the wall, a vertically facing cooling fan is fixed at the bottom of the radiator; a vertical air collection channel is arranged on the back side of the radiator wall; a wind guide deflector arranged obliquely is also included, and the wind guide deflector is connected to a The back side wall of the heat exchanger on the first floor and the outer wall of the heat exchanger on the next layer guide the fresh air into the vertical air collection channel after heat exchange; The fan at the bottom of the vertical air collection channel; the inside of the radiator adopts a zigzag cooling air channel design, which increases the heat dissipation area, improves the heat dissipation efficiency and reduces the volume of the radiator. Using automatic heat dissipation technology, a temperature sensor is installed on each group of radiators, and the forced air cooling is always started and stopped according to the temperature, so as to ensure the heat dissipation effect and reduce energy consumption at the same time.

Description

A cooling device for high-power thyristor chains suitable for rail transit

technical field

The utility model relates to the technical field of heat exchange, in particular to a cooling device suitable for a high-power thyristor chain of rail traffic.

Background technique

SCR (Silicon Controlled Rectifier), referred to as SCR, is a high-power electrical component, also known as a thyristor. It has the advantages of small size, high efficiency and long life. In the automatic control system, it can be used as a high-power drive device to realize the control of high-power equipment with low-power controls. It has been widely used in AC and DC motor speed control system, power adjustment system and servo system. Due to its high power, the heat generation is more prominent. At present, once the thyristor water-cooled radiators on the market are installed in the electrical system, if you want to replace the thyristor, you need to disassemble the entire radiator, and then disassemble the radiator frame to replace it, which is time-consuming and laborious, which is very inconvenient. . Therefore, most of the measures adopted at present are forced air cooling.

However, the existing air-cooled radiator, such as the Chinese patent application number 2015105001166, discloses a thyristor radiator, which includes a copper core, and the copper core is covered with cooling fins, and the cooling fins include eight copper cooling fins. and fourteen aluminum alloy heat sinks, gap grooves are provided between the heat sinks, copper heat sinks are provided for conduction and power transmission; aluminum alloy heat sinks and copper cores are provided for heat dissipation, and hot gas is dissipated from The thyristor is brought out, and the problem of heat dissipation when the silicon chain composed of several thyristors is used on a large scale is not considered, and the redundant design between natural heat dissipation and forced air cooling is not fully considered, and the thermal efficiency is not high. The application effect is not good in occasions with high heat dissipation requirements. At the same time, the interaction between the radiator modules is not considered. Although the heat dissipation of the high-power thyristor chain located at the lower part of the cabinet can be guaranteed, the high-power thyristor chain located at the upper part of the cabinet is easily affected by the hot air below, and the overall heat dissipation The efficiency is low, which in turn causes the fan to work at any time to ensure the heat dissipation effect, and the energy consumption of the entire heat dissipation device is relatively large.

Utility model content

The technical problem to be solved by the utility model is that in the prior art, in the application of the thyristor chain, in the special working condition with high heat dissipation requirements, if the thyristor radiator is used, the heat dissipation will be poor, and This leads to the problem of not being able to adapt to the heat dissipation requirements during large-scale use; and the problem that there is no heat dissipation device suitable for high-power thyristor chains in the prior art. In order to solve the above-mentioned technical problems, the technical solution adopted by the utility model is: a heat dissipation device suitable for a high-power thyristor chain for rail transit, including a radiator group composed of several radiators arranged side by side. The silicon-controlled chain is fixed on the outer wall of each radiator, and a vertical cooling fan is fixed on the bottom of the radiator; several groups are arranged up and down in the radiator group to form a radiator wall. The back side of the radiator wall is provided with a vertical air collection channel; it also includes an inclined wind guide deflector, and the wind guide deflector is connected to the back side wall of the upper radiator and the outer side wall of the next radiator. The fresh air is introduced into the vertical air collection channel after heat exchange; it also includes a dust-proof deflector arranged on the top of the vertical air collection channel and an air collection channel fan arranged at the bottom of the vertical air collection channel.

In particular, a temperature sensor is fixed on the outer wall of the radiator above the high-power thyristor chain, and both the air confluence duct fan and the cooling fan are electrically connected to the temperature sensor.

In particular, the radiator is a square box, inside the box there are several heat exchange air ducts arranged side by side, and the heat exchange air ducts are arranged vertically.

Furthermore, the inside of the heat exchange air duct is provided with a serrated heat dissipation surface.

In particular, the dust-proof deflector is in the shape of an inverted pyramid.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

1. The interior of the radiator is designed with a zigzag cooling air duct to increase the cooling area, improve the cooling efficiency and reduce the volume of the radiator.

2. Adopt automatic heat dissipation technology, set temperature sensor on each radiator, start and stop forced air cooling according to temperature, ensure heat dissipation effect and reduce energy consumption at the same time.

3. Adopt independent multi-stage air duct design to improve the exchange efficiency of fresh air and hot air, reduce the mutual influence between radiator groups, and improve the heat dissipation efficiency of high-power thyristor chain modules.

Description of drawings

Figure 1 is a schematic diagram of the radiator structure.

FIG. 2 is a schematic diagram of the enlarged structure at A in FIG. 1 .

Fig. 3 is a structural schematic diagram of the device of the present invention.

The interpretation of each label in the figure is: Radiator—1; High-power thyristor chain—2; Cooling fan—3; Vertical air duct—4; Air deflector—5; Conveyor fan—7; temperature sensor—8; heat exchange air duct—11; serrated cooling surface—12.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention, in order to describe the concept of the present invention, the technical problems to be solved, the technical features and the belts of the technical solutions. To have a better understanding of the technical effects of the coming.

As shown in Figure 1, a cooling device for a high-power thyristor chain suitable for rail transit includes a radiator group composed of several radiators 1 arranged side by side, and a high-power thyristor chain 2 is fixed on each radiator On the outer wall of the radiator 1, a vertically facing cooling fan 3 is fixed at the bottom of the radiator 1; several groups are arranged up and down in the radiator group to form a radiator wall, and on the back side of the radiator wall It is provided with a vertical air collection channel 4; it also includes a wind deflector 5 arranged obliquely, and the wind deflector 5 is connected to the back side wall of the radiator 1 on the upper layer and the outer side wall of the radiator 1 on the next layer, The fresh air is introduced into the vertical air collection channel 4 after heat exchange; it also includes a dust-proof deflector 6 arranged on the top of the vertical air collection channel 4 and a Conveyor fan7.

In the utility model, the radiator 1 adopts integral casting, and multiple sets of high-power thyristor chains 2 can be installed. The bottom of each radiator 1 is installed with cooling fans 3 at intervals. There is a certain interval between each cooling fan 3 to ensure that the air can circulate naturally and dissipate heat naturally when the fan is not started.

When multiple sets of high-power thyristor chains 2 need to be used inside the cabinet, heat-insulating wind deflectors 5 are arranged between the radiators 1. The heat is transferred between the fresh air and the hot air flowing out of the radiator 1, and the second is to guide the flow direction of the fresh air and the hot air, thereby improving the heat dissipation efficiency. Fresh air enters the radiator 1 from the cooling fan 3 at the bottom of the radiator 1, then flows out of the radiator 1 from the top of the radiator 1, passes through the function of the air guide deflector 5, and then enters the special channel for hot air, that is, the vertical air collection channel 4, Sent to the outside of the cabinet by the confluence duct fan 7. In order to further improve the heat dissipation efficiency, in addition to installing cooling fans 3 at the bottom of each radiator 1, a row of fans is also arranged at the air inlet at the bottom of the vertical air collection duct 4, that is, the air collection duct fan 7, to ensure that the hot air can To flow out of the cabinet quickly enough.

In particular, a temperature sensor 8 is fixed on the outer wall of the radiator 1 above the high-power thyristor chain 2 , and the air confluence duct fan 7 and the cooling fan 3 are both electrically connected to the temperature sensor 8 .

In this embodiment, multiple groups of temperature sensors 8 are set on the radiator 1 to collect the heat dissipation temperature in real time, and the start and stop of the cooling fan 3 can be controlled in real time according to the temperature of the radiator 1, that is, when natural heat dissipation cannot meet the heat dissipation requirements, By starting the heat dissipation fan 3 to forcibly dissipate heat, the heat dissipation effect is ensured, and the reliability of heat dissipation of the high-power thyristor chain 2 is ensured. When the temperature of the radiator 1 drops to the low point of the set temperature, the cooling fan 3 is controlled to stop, so as to save electric energy.

In particular, the radiator 1 is a square box, inside the square box there are several heat exchange air ducts 11 arranged side by side, and the heat exchange air ducts 11 are arranged vertically.

In this embodiment, the heat is exchanged through the heat exchange air passages 11 inside the square box of the radiator 1, and the heat dissipation is enhanced through a plurality of mutually parallel air passages. In this embodiment, the directions of the heat exchange air duct 11 and the cooling fan 3 need to match, both of which are vertical, so as to cooperate with the vertical air confluence duct 4 and the confluence duct fan 7 to exhaust the air after the confluence.

As shown in FIG. 2 , further, the inside of the heat exchange air channel 11 is provided with a zigzag heat dissipation surface 12 .

In this embodiment, the serrated heat dissipation surface 12 is set inside the heat exchange air channel 11 to increase the heat exchange area to improve the heat exchange efficiency, facilitate the reduction of the radiator volume, accelerate the heat dissipation speed, and better reduce energy consumption. .

As shown in FIG. 3 , in particular, the dust-proof deflector 6 is in the shape of an inverted pyramid.

In this embodiment, the function of the dust-proof deflector 6 is to shield the influence of external dust and water droplets on the top of the vertical air collection channel 4 on the entire heat dissipation device, and prevent water leakage and dust falling in the equipment room from affecting the normal operation of the equipment. and service life, ensuring the air outlet efficiency of the air duct while taking into account the functions of preventing dripping water and falling dust.

The "connection" and "fixation" appearing in the description of the utility model can be fixed connection, processing and forming, welding, or mechanical connection, and the specific meanings of the above terms in the utility model should be understood in specific cases.

In the description of the utility model, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc. appearing, and the orientation or positional relationship indicated by them are only for the convenience of describing the utility model and The description is simplified, but does not indicate or imply a specific orientation that the device or element must have, so it should not be construed as a limitation of the present invention.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand It can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the various embodiments of the present invention Scope of technical solutions.

Claims (2)

1. The heat dissipation device for the high-power silicon-controlled chain suitable for rail transit is characterized by comprising a heat dissipation device group consisting of a plurality of heat dissipaters (1) arranged side by side, wherein each heat dissipater (1) is a square box body, a plurality of heat exchange air channels (11) arranged side by side are arranged in each square box body, the heat exchange air channels (11) are vertically arranged, and a saw-toothed heat dissipation surface (12) is arranged in each heat exchange air channel (11); the high-power silicon-controlled chain (2) is fixed on the outer side wall of each radiator (1), and a vertically-oriented radiating fan (3) is fixed at the bottom of each radiator (1); a plurality of radiator groups are arranged up and down to form a radiator wall, and a vertical air collecting channel (4) is arranged on the back side of the radiator wall; the air guide plate (5) is obliquely arranged, the back side wall of the upper layer of radiator (1) and the outer side wall of the lower layer of radiator (1) are connected with the air guide plate (5), and fresh air is guided into the vertical air gathering channel (4) after heat exchange; the dust-proof air deflector (6) is arranged at the top of the vertical air gathering channel (4), and the air gathering channel fan (7) is arranged at the bottom of the vertical air gathering channel (4); and a temperature sensor (8) is further fixed on the outer wall of the radiator (1) above the high-power silicon controlled chain (2), and the air collecting channel fan (7) and the heat radiating fan (3) are electrically connected with the temperature sensor (8).

2. The high-power thyristor chain heat sink device suitable for rail transit as claimed in claim 1, wherein the dustproof deflector (6) is in the shape of an inverted pyramid.

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