CN219305307U

CN219305307U - Hot air cooling device for high-voltage frequency converter and power electronic equipment

Info

Publication number: CN219305307U
Application number: CN202320132846.5U
Authority: CN
Inventors: 孟江
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-02-07
Filing date: 2023-02-07
Publication date: 2023-07-04
Anticipated expiration: 2033-02-07

Abstract

The utility model relates to a hot air cooling device for a high-voltage frequency converter and power electronic equipment, which comprises a main air duct, an annular heat pipe, a straight-through heat pipe and a main fan, wherein the main air duct surrounds one or more heat dissipation parts of the equipment, and the main fan is arranged at the opening end of the main air duct; the heat insulation section of the annular heat pipe is positioned indoors, the annular heat pipe is adaptively sleeved in the limiting hole, a gap between the annular heat pipe and the heat insulation section is filled with heat insulation materials, and the annular heat absorption section is stacked and provided with a plurality of layers; the outer end of the annular heat pipe extends out of the heat insulation section, and an outer fan is arranged in the condensing pipe; the straight-through heat pipe is arranged on the side face of the main air duct, the inner end of the straight-through heat pipe extends into the main air duct environment, the outer end of the straight-through heat pipe penetrates through the heat insulation section and extends into the condensation section, an air inlet pipe and an exhaust pipe are respectively arranged on the upper portion and the lower portion of the condensation section, the air inlet pipe and the exhaust pipe are respectively communicated with a calandria and an air inlet pipe of the air cooler, the failure rate of electronic equipment is reduced, the service life is prolonged, the cost is reduced, and the failure rate is reduced.

Description

Hot air cooling device for high-voltage frequency converter and power electronic equipment

Technical Field

The utility model relates to the technical field of power electronic equipment cooling, in particular to a hot air cooling device for a high-voltage frequency converter and power electronic equipment.

Background

With the continuous progress of technology, power electronic devices are increasingly used. The medium and high power motors are all driven by high voltage frequency converters. The equipment consists of a transformer and a semiconductor electronic element, and has large self-heating value, poor high-temperature tolerance and high environmental requirement. And adopting a forced air cooling mode.

At present, a plurality of users adopt three cooling modes; the first is to install a high-power air conditioning and refrigerating unit indoors, and the mode is only applicable to smaller equipment.

The second is to install the wind-guiding pipe to discharge the hot air out of the room, and to install the high-power refrigerating unit to reduce the room temperature. This way exists as follows;

1, the indoor temperature is limited by the outdoor temperature, and the room temperature in hot weather is too high and is about 40 ℃. The working environment of the air conditioner is bad, which is not beneficial to heat dissipation of equipment;

2, the indoor humidity in plum rain season is too high, which is very dangerous for high-voltage electricity;

3, some environmental dust of factories and mines is too large and continuously enters the equipment, so that a filter screen is blocked, dust is collected by an element, and the service life and safety of the equipment are seriously threatened.

Third, it is also the most normal practice to install an empty water chiller. However, the method is high in cost, limited in installation position and high in power consumption. General users do not accept the product; the former two types are mostly adopted, and the defects are overcome. All the three methods have the advantages of large investment, large power consumption and large maintenance cost. Based on the above, it is necessary to study a hot air cooling device for a high voltage inverter and a power electronic device.

Disclosure of Invention

In view of the above, the utility model aims to provide a hot air cooling device for a high-voltage frequency converter and power electronic equipment, which effectively solves the problems of poor cooling effect, high input cost, high operation and maintenance cost and easiness in entering dust into the equipment of the existing cooling structure.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a be used for high-voltage inverter and power electronic equipment hot air heat sink, includes main wind channel, annular heat pipe, straight-through shape heat pipe and main fan, main wind channel surrounds one or more radiating portion of equipment, and main wind channel's one end is sealed, and the other end is open, and is provided with main fan at the open end; the annular heat pipe and the heat dissipation part are correspondingly arranged, wherein the annular heat absorption sections of the annular heat pipe are stacked and provided with a plurality of layers and encircle the periphery of the heat dissipation part; limiting plates for sealing and fixing the heat pipes and the shell are respectively arranged at two ends of the annular heat pipe, and limiting holes corresponding to the arrangement of the heat pipes are formed in the limiting plates; the annular heat pipe is sleeved in the limiting hole in an adaptive manner, and a gap between the annular heat pipe and the heat insulation section is filled with heat insulation materials; the outer end of the annular heat pipe extends to the outside of the heat insulation section, a condensing section is arranged at the outer end of the annular heat pipe or the heat insulation section, an air inlet exposing the exposed heat exchange heat pipe is arranged between the condensing section and the heat insulation section, and an external fan is arranged in the condensing section;

the straight-through heat pipe is arranged on the side surface of the main air duct, an inner limit plate is arranged at the inner end of the heat insulation section of the straight-through heat pipe, and a sealing plate and an outer limit plate are arranged at the outer end of the heat insulation section of the straight-through heat pipe; the heat insulation section is arranged between the inner limiting plate and the outer limiting plate, the condensation section is arranged between the sealing plate and the outer limiting plate, and corresponding limiting holes are formed in the inner limiting plate and the outer limiting plate; the straight-through heat pipe is sleeved in the limiting hole in an adaptive mode, the heat insulation materials are filled in gaps of the heat insulation sections of the straight-through heat pipe and the straight-through heat pipe, the inner end of the straight-through heat pipe extends to the main air pipe environment, the outer end of the straight-through heat pipe penetrates through the heat insulation section and extends into the condensation section, radiating fins are arranged at the inner end and the outer end of the straight-through heat pipe, an air inlet pipe and an exhaust pipe are arranged on the upper portion and the lower portion of the condensation section respectively, and the air inlet pipe and the exhaust pipe are respectively communicated with the exhaust pipe and the air inlet pipe of the air cooler.

Further, the limit Kong Kaobian is disposed at the left side, the right side and the upper side of the limit plate, and the annular heat pipes are adapted to be mounted in the limit holes, wherein the annular heat pipes at the left side and the right side are surrounded at the left side, the right side and the inner side of the heat dissipation part, and the annular heat pipes at the upper side are bent downwards at the limit plate and correspond to the outer side of the heat dissipation part.

Further, fins are arranged on the heat absorption section and the condensation section of the annular heat pipe.

Further, the air cooler is formed by an evaporator coil of an air conditioning unit and a fan or by a circulating pipeline of a cold water system and the fan, and air doors are arranged on a return air pipe and an air outlet pipe of the air cooler.

Further, the annular heat pipe and the straight-through heat pipe are respectively provided with one or more.

Furthermore, the lower part and the lower part of the limiting plate are provided with limiting holes which are alternately staggered, the annular heat pipes are matched and arranged in the limiting holes, and the annular heat pipes at the upper side and the annular heat pipes at the lower side are respectively arranged in a bending downward way and a bending upward way and are positioned on the outer side face of the heat dissipation part together.

The beneficial effects of the technical scheme are as follows: according to the utility model, a plurality of annular heat pipe assemblies in a shape like Chinese character 'Hui' are correspondingly configured according to the positions of hot air outlets of equipment. The heat pipe heat absorption section is in large-area contact with hot air of equipment, heat is rapidly led out of the outdoor condensation section, and the heat is brought into the atmosphere through forced convection. Furthermore, in order to lead out the residual heat in the main air duct outdoors, a rectangular straight-through heat pipe assembly is arranged at the rear section of the main air duct, so that the heat absorption is larger, and the heat dissipation area improves the cooling effect.

In order to cope with extremely high temperature climate, the air inlet and outlet pipes of the radiator are connected with an air cooler, cold air is utilized to forcedly dissipate heat, and the refrigerating power or the cold water flow is regulated in real time according to the indoor temperature demand, so that the requirement of equipment on the environmental temperature is effectively ensured. Meanwhile, the indoor and outdoor temperatures are analyzed through the automatic control system, the air door mode is switched in real time, the using amount of cold air is reduced, and the best energy-saving effect is achieved.

Therefore, the utility model realizes the exhaust cooling of the main air duct through heat absorption, heat transfer and heat dissipation of more than two stages of heat pipe assemblies. The heat in the exhaust air of the equipment is led out of the room by adopting a superconducting heat pipe structurally. The exhaust air of the equipment is discharged into the room after being cooled to form internal circulation, thereby optimizing the cooling condition. And no dust can enter the device anymore. And because a high-power refrigerating unit or a plurality of air conditioners are not needed, huge electricity fees and maintenance and replacement fees are saved. Finally, the failure rate of the electronic equipment is reduced, the service life is prolonged, the cost is reduced, the durability of the equipment is improved, and the failure rate is reduced.

According to the utility model, according to the emission direction of the heat dissipation part, the annular heat pipe is correspondingly arranged at the heat dissipation part, the initial heat discharged by the heat is fully contacted with the annular heat pipe, the heat absorption capacity of the annular heat pipe is ensured, the heat of the heat dissipation part directly entering the main air pipe is reduced, the annular heat pipe extends to the outside through the heat insulation section and is subjected to condensation heat dissipation through the external fan, in order to improve the condensation effect, the outside of the annular heat pipe is directly exposed to the environment, and the condensation section is arranged at the exposed annular heat pipe through the hollowed-out bracket or the external bracket, so that the heat exchange of the annular heat pipe is ensured.

In a further structure, the auxiliary heat dissipation device is arranged in the main air pipe aiming at the heat remained in the main air pipe, a heat absorption section and a condensation section are respectively formed in the main air pipe and outside the heat insulation section of the straight-through heat pipe through the combined structure of the straight-through heat pipe and the heat dissipation fins, the heat is taken away from the condensation section by the internal circulation air cooler, the heat dissipation of the environment in the main air pipe is further realized, and the redundant heat is discharged from the main air cooler.

Therefore, the utility model realizes the exhaust cooling of the main air duct through heat absorption, heat transfer and heat dissipation of more than two stages of heat pipe assemblies. The heat in the equipment exhaust air is led out of the room by adopting the superconducting heat pipe structurally, and the equipment exhaust air is discharged into the room after being cooled to form internal circulation, so that the cooling condition is optimized; and no dust enters the equipment, meanwhile, as a high-power refrigerating unit or a plurality of air conditioners are not needed, huge electricity charge and maintenance and replacement cost are saved, the failure rate of the electronic equipment is finally reduced, the service life is prolonged, the cost is reduced, the durability of the equipment is improved, and the failure rate is reduced.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a side view of FIG. 1;

FIG. 4 is a schematic view of the structure within the main pipe;

FIG. 5 is a top view of FIG. 4;

FIG. 6 is a schematic view of another embodiment of the present utility model;

FIG. 7 is a schematic view of the internal structure of the insulation section;

FIG. 8 is a schematic view of a fin structure;

FIG. 9 is a schematic view of another construction of a heat exchange tube;

fig. 10 is a schematic perspective view of another perspective view of the present utility model.

Reference numerals: 1 is a main air pipe, 2 is a main fan, 3 is an insulating section, 4 is an annular heat pipe, 41 is a heat absorbing section, 42 is a condensing section, 43 is a lower annular heat pipe, 44 is an upper annular heat pipe, 5 is a condensing section, 6 is an outer fan, 7 is a heat radiating part, 8 is an insulating material, 9 is a straight-through heat pipe insulating section, 10 is an air inlet pipe, 11 is an exhaust pipe, 12 is a straight-through heat pipe, 13 is a radiating fin, and 14 is a middle limiting plate.

Detailed Description

The utility model is described in further detail below with reference to the attached drawings and detailed description:

embodiment 1 aims at providing a hot air cooling device for a high-voltage frequency converter and power electronic equipment, which is mainly used for treating heat dissipation of equipment, and aims at solving the problems that the cooling structure is poor in cooling effect, high in cost and dust easily enters the inside of the equipment.

As shown in fig. 1-6, a hot air cooling device for a high-voltage frequency converter and a power electronic device comprises a main air duct 1, an annular heat pipe 4, a straight-through heat pipe 12 and a main fan 2, in this embodiment, the main air duct 1 is firstly arranged for a heat dissipation part 7 of the device, the main air duct 1 surrounds one or more heat dissipation parts 7 of the device, heat of the heat dissipation part 7 is prevented from directly entering an internal environment to cause the temperature rise of the internal environment, and when the heat dissipation capacity is medium or small, a secondary heat dissipation structure, namely, direct heat dissipation and annular heat dissipation of the main air duct, is arranged for the direct heat dissipation of the main air duct, wherein the direct heat dissipation of the main air duct is to directly discharge residual heat into the internal environment, and the annular heat dissipation is to discharge heat generated by the heat dissipation part into an external environment through guiding.

As a main air duct direct-discharge heat radiation structure, one end of a main air duct 1 is closed, the other end is opened and a main fan 2 is arranged at the opening end, and the main air duct is mainly used for discharging heat remained in the main air duct 1.

In the embodiment, the heat insulation section 3 and the heat dissipation part 7 are correspondingly arranged and fixed on the side surface of the main air duct 1, the two ends of the heat insulation section 3 are respectively provided with a limiting plate for sealing the heat insulation section 3, the limiting plates are provided with limiting holes, the middle part of the heat insulation section 3 is provided with a middle limiting plate 14, and the middle limiting plate 14 is provided with limiting holes; the annular heat pipe 4 is sleeved in the limiting hole in an adaptive mode, a heat insulation material 8 is filled in a gap between the annular heat pipe 4 and the heat insulation section 3 to form a heat insulation heat conduction section, and the heat inside the heat insulation heat conduction section is guided to the outside and is subjected to concentrated heat dissipation outside.

In the heat absorption section of the annular heat pipe, as shown in fig. 3-4 in this embodiment, the inner ends of the annular heat pipes 4 are stacked and provided with multiple layers, and a heat absorption body is formed on the periphery of the heat dissipation part 7 in an annular shape, and the structure of the heat absorption body is in a shape like a Chinese character 'kou'; the limit Kong Kaobian is arranged at the left side, the right side and the upper side of the limit plate, the annular heat pipes 4 are adapted to be arranged in each limit hole, wherein the annular heat pipes at the left side and the right side are annularly arranged at the left side, the right side and the inner side of the heat dissipation part, and the annular heat pipe 44 at the upper side is bent downwards at the limit plate and corresponds to the outer side of the heat dissipation part.

The outer end of the annular heat pipe 4 extends out of the heat insulation section, a condensation section 5 is arranged at the outer end of the annular heat pipe or the heat insulation section, an air inlet exposing the exposed heat exchange heat pipe exists between the condensation section 5 and the heat insulation section 3, an external fan 6 is arranged in the condensation section 5, and fins are arranged on the heat absorption section and the condensation section of the annular heat pipe 4.

The annular heat dissipation assembly is arranged at each exhaust fan of the electronic equipment, the annular heat pipe heat absorption sections are arranged in a shape of a Chinese character 'kou', round fins are arranged on the annular heat pipe, the heat absorption sections of the assembly are connected with the main air duct, the heat insulation sections are arranged indoors, foam heat insulation materials are filled in the heat insulation sections, two ends of the heat insulation sections are provided with steel plates for sealing, the condensing sections are arranged outdoors, the condensing structure of the annular heat pipe is formed by combining a plurality of layers of loop-shaped aluminum fins, air inlets are reserved on four sides of a shell, and an axial flow fan is arranged in the end part shell.

As shown in fig. 1-8, the auxiliary heat dissipation device in this embodiment includes a straight-through heat pipe 12, a heat dissipation fin 13 and a heat insulation section 9 of the straight-through heat pipe, when the annular heat exchange assembly is difficult to effectively discharge heat, so that the heat discharge amount in the main air duct 1 is relatively large.

In a specific structure, in the embodiment, the heat insulation section 9 of the straight-through heat pipe is arranged on the side surface of the main air duct 1, the inner end of the heat insulation section of the straight-through heat pipe is provided with an inner limit plate, and the outer end of the heat insulation section of the straight-through heat pipe is provided with a sealing plate and an outer limit plate; the heat insulation section is arranged between the inner limiting plate and the outer limiting plate, the condensing section is arranged between the sealing plate and the outer limiting plate, and the condensing section extends to the outside.

Corresponding limiting holes are formed in the inner limiting plate and the outer limiting plate and are used for sealing the heat insulation section and limiting the heat pipe; the straight-through heat pipe 12 is sleeved in the limiting hole in an adaptive manner, and a heat insulation material is filled in the gap between the straight-through heat pipe 12 and the heat insulation section 9 of the straight-through heat pipe to form a heat insulation section.

As shown in fig. 10, the inner end of the straight-through heat pipe 12 extends into the main air pipe inner environment, the outer end of the straight-through heat pipe 12 passes through the heat insulation section and extends into the condensation section, the inner end and the outer end of the straight-through heat pipe are both provided with radiating fins 13, the upper and lower parts of the condensation section are respectively provided with an exhaust pipe 11 and an air inlet pipe 10, the air inlet pipe 10 and the exhaust pipe 11 are respectively communicated with a calandria and an inlet pipe of an air cooler, the middle part of the heat insulation section 9 of the straight-through heat pipe is provided with a middle limiting plate, and the middle limiting plate is provided with limiting holes.

In implementation, the straight-through heat pipes 12 are vertically and horizontally arranged to form a rectangular combination, the heat absorption section is provided with a plurality of honeycomb fins, the heat absorption section is connected with the main air duct, the heat insulation section has the same structure as that of the heat insulation section of the annular heat exchange assembly, the condensing section is outdoor and also provided with the fin combination, the end part of the shell is closed, the upper surface and the lower surface are provided with air inlet and exhaust pipe interfaces, the air inlet and exhaust pipe interfaces are connected with an internal circulation refrigerator (the internal circulation air cooler is of an existing structure, and the cold air system is provided with an air door switching function of closed-loop ventilation and open-loop natural ventilation modes, and forced air cooling or natural air cooling is selected according to the temperature condition through an automatic control system).

The electronic equipment technology requires that the environmental temperature is not higher than 40 ℃, temperature detection sensors can be arranged at the cold end, the hot end and the air inlet and outlet of each heat exchanger according to the requirements, and the working mode of an air door of the air cooler and the start and stop of the refrigerator can be automatically controlled according to the temperature. The load of the refrigerator is indirectly controlled through the electronic expansion valve, so that the indoor temperature is not higher than 40 ℃ at any ambient temperature, and the refrigerator works in the most energy-saving state.

In the further implementation, for the case of adding a plurality of devices with high power, the power of the matched refrigerator is high, the number of the matched refrigerators is high, the power consumption is high, but the heat discharged by the devices is huge, so that one or more auxiliary heat radiating devices are arranged, and a modification test is carried out on a 10KV/2400KVA high-voltage frequency converter. PT100 thermal resistors are respectively arranged at the inlets and outlets of the first-stage heat pipe and the fifth-stage heat pipe and are connected with an automatic control system. Through tests, when the ambient temperature is 40 ℃, the air outlet temperature of the equipment is 60-65 ℃ under the state that all stages of heat exchanger fans do not work, and when all stages of heat radiator fans are started, the air outlet temperature is reduced to 45 ℃. When the fan coil works under the full load of the 5P refrigerator, the outlet temperature is 20 ℃. The indoor temperature was 35 ℃. And stopping the refrigerating unit when the ambient temperature is about 35 ℃.

The total air conditioner is 30P matched before reconstruction, the air conditioner is operated in full time in an overload way, the daily power consumption is more than 500KW/h, and most seasons are working. The power consumption is reduced to about 100KW/h after reconstruction, and the annual operation day is only about 20 days. The frequency converter is provided with a special person for ash removal and supervision before transformation. The air conditioner inner and outer units are cleaned once in half a month, and the month cost is more than 7 kiloyuan. Every two years there will be air conditioning to be updated. And sometimes the power unit is out of order due to overtemperature and even the unit is damaged. The indirect loss of production stoppage is quite large; after transformation, the environmental temperature and the air purification meet the optimal requirements of the equipment, the maintenance times are greatly reduced, and the phenomenon of fault shutdown is rarely generated.

Embodiment 3 is substantially the same as embodiment 1, except that the annular heat pipe structure is further described.

In this embodiment, as shown in fig. 9, the lower part and the lower part of the limiting plate are provided with alternately staggered limiting holes, the annular heat pipe 4 is adapted to be fitted in the limiting holes, wherein the upper annular heat pipe 44 and the lower annular heat pipe 43 are respectively bent downward and bent upward and are jointly positioned on the outer side surface of the heat dissipation part, and by this structure, the arrangement area and the heat conduction efficiency of the annular heat pipes can be increased.

Claims

1. The hot air cooling device for the high-voltage frequency converter and the power electronic equipment is characterized by comprising a main air duct, an annular heat pipe, a straight-through heat pipe and a main fan, wherein the main air duct surrounds one or more heat dissipation parts of the equipment, one end of the main air duct is closed, the other end of the main air duct is open, and the main fan is arranged at the open end; the annular heat pipe and the heat dissipation part are correspondingly arranged, wherein the annular heat absorption sections of the annular heat pipe are stacked and provided with a plurality of layers and encircle the periphery of the heat dissipation part; limiting plates for sealing and fixing the heat pipes and the shell are respectively arranged at two ends of the annular heat pipe, and limiting holes corresponding to the arrangement of the heat pipes are formed in the limiting plates; the annular heat pipe is sleeved in the limiting hole in an adaptive manner, and a gap between the annular heat pipe and the heat insulation section is filled with heat insulation materials; the outer end of the annular heat pipe extends to the outside of the heat insulation section, a condensing section is arranged at the outer end of the annular heat pipe or the heat insulation section, an air inlet exposing the exposed heat exchange heat pipe is arranged between the condensing section and the heat insulation section, and an external fan is arranged in the condensing section;

2. The hot air cooling device for a high-voltage inverter and a power electronic device according to claim 1, wherein: the limit Kong Kaobian is arranged at the left side, the right side and the upper side of the limit plate, the annular heat pipes are matched and arranged in the limit holes, the annular heat pipes at the left side and the right side encircle the left side, the right side and the inner side of the heat dissipation part, and the annular heat pipes at the upper side are bent downwards at the limit plate and correspond to the outer side of the heat dissipation part.

3. The hot air cooling device for a high-voltage inverter and a power electronic device according to claim 1, wherein: fins are arranged on the heat absorption section and the condensation section of the annular heat pipe.

4. The hot air cooling device for a high-voltage inverter and a power electronic device according to claim 1, wherein: the air cooler is formed by an evaporator coil of an air conditioning unit and a fan or by a circulating pipeline of a cold water system and the fan, and air doors are arranged on a return air pipe and an air outlet pipe of the air cooler.

5. The hot air cooling device for a high voltage inverter and a power electronic apparatus according to any one of claims 1 to 4, wherein: the annular heat pipe and the straight-through heat pipe are respectively provided with one or more.

6. The hot air cooling device for a high voltage inverter and a power electronic apparatus according to claim 5, wherein: the lower part and the lower part of the limiting plate are provided with alternately staggered limiting holes, the annular heat pipes are matched and arranged in the limiting holes, and the annular heat pipes at the upper side and the annular heat pipes at the lower side are respectively arranged in a bending downward way and a bending upward way and are positioned on the outer side face of the heat dissipation part together.