Cooling device for frequency converter of wind turbine generator

Abstract

The utility model discloses a wind turbine generator frequency converter cooling device, and belongs to the technical field of cooling equipment. The frequency converter comprises a frequency converter housing which is internally provided with a wind power assembly; the heat exchange strips are used for absorbing heat in the frequency converter shell, the heat exchange strips are fixedly arranged on one side of the frequency converter shell through the surrounding plate, liquid grooves are formed in the inner sides of the heat exchange strips, and the heat exchange strips are located in the frequency converter shell; as the heat exchange strip is hermetically mounted on one side of the shell of the frequency converter to exchange heat generated inside, the cooling effect on the frequency converter is realized, and the inside of the frequency converter is kept in a sealed state, the problem that the inside of the frequency converter is easily affected by moisture when being communicated with the outside is solved, and the service life of the frequency converter is prolonged. Therefore, the sealing performance of the frequency converter can be ensured when the frequency converter is cooled, and the moisture-proof effect is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of cooling equipment, and more specifically, to a cooling device for a frequency converter of a wind turbine generator set. Background Art

[0002] The frequency converter of a wind turbine is an indispensable key component in a wind power generation system. It adjusts the operating speed and torque of the motor by changing the voltage and frequency of the power grid. The basic components include a rectifier (converting AC power into DC power), an intermediate DC link (smoothing DC voltage) and an inverter (converting DC power back into AC power). Frequency converters are widely used in industrial and commercial fields to improve energy efficiency and process control flexibility.

[0003] In the related art, in order to realize the heat dissipation function of the wind turbine inverter, for example, the patent with the prior art publication number CN215898280U provides a wind turbine inverter cooling device, which uses a first temperature sensor to measure the temperature of the left area inside the box, and the first temperature sensor transmits the measured temperature to the dual-way temperature controller using an electrical signal, and then the dual-way temperature controller controls the rotation of the first fan, the first fan faces the position of the first temperature sensor, and then the first fan cools the left area inside the box; the second temperature sensor is used to measure the temperature of the right area inside the box, the second temperature sensor transmits the measured temperature to the dual-way temperature controller using an electrical signal, and then the dual-way temperature controller controls the rotation of the second fan, the second fan faces the position of the second temperature sensor, and then the second fan cools the right area inside the box.

[0004] Although the above-mentioned prior art solution detects the temperature inside the inverter through a temperature sensor and controls the operation of the fan to achieve the effect of heat dissipation and cooling inside the inverter, the interior of the inverter is connected to the outside world. When the humidity is high, moisture from the outside world can easily enter the interior of the inverter, which is not safe to use.

[0005] In view of this, we propose a wind turbine inverter cooling device. Utility Model Content

[0006] The purpose of the present application is to provide a cooling device for a wind turbine inverter, which solves the technical problem that the interior of the inverter is easily affected by moisture since it is connected to the outside world, and achieves the technical effect of sealing the inverter and ensuring cooling and heat dissipation.

[0007] The present application provides a wind turbine inverter cooling device, comprising:

[0008] A frequency converter housing, wherein a wind power component is arranged inside the frequency converter housing;

[0009] A heat exchange bar, used to absorb heat inside the inverter housing, the heat exchange bar is fixedly arranged on one side of the inverter housing through a surrounding plate, a plurality of the heat exchange bars are arranged, a liquid tank is opened inside the heat exchange bar, and the heat exchange bars are all located inside the inverter housing;

[0010] A circulation component is used to transport coolant to circulate inside the liquid tank. The circulation component includes a side plate, which is fixedly arranged on the outside of the liquid tank. A liquid inlet box and a reflux box are fixedly arranged at both ends of the outside of the side plate corresponding to the liquid tank, and a heat sink is arranged between the liquid inlet box and the reflux box.

[0011] As an optional solution of the technical solution of the present application document, the circulation component also includes a reflux branch pipe for connecting the reflux box and the heat sink, a collector is fixedly arranged on the side of the heat sink away from the reflux branch pipe, the liquid outlet end of the collector is fixedly connected to the input end of the water pump, the water pump is fixedly arranged on the outer side of the side plate, a diverter is fixedly arranged on the output end of the water pump, and the diverter is fixedly connected to the liquid inlet box through a plurality of liquid inlet branches.

[0012] As an optional solution of the technical solution of the present application document, a heat dissipation fin is fixedly arranged on the outer side of the heat dissipation plate, and a plurality of heat dissipation fins are arranged, and a radiator is fixedly arranged on the outer side of the heat dissipation plate.

[0013] As an optional solution to the technical solution of the present application document, the wind power component includes a support plate, an air intake hole is opened on the inner side of the support plate, a fan is arranged on the inner side of the air intake hole, and an air outlet hole is also opened on the inner side of the support plate, and the air outlet hole is located outside the air intake hole.

[0014] As an optional solution of the technical solution of the present application document, a water pressure sensor is fixedly arranged on the outside of the liquid inlet box or the reflux box.

[0015] As an optional solution of the technical solution of the present application document, an alarm is fixedly provided on the outer side of the enclosure, and the alarm is electrically connected to the controller inside the inverter housing.

[0016] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0017] (1) The present application uses a heat exchange strip sealed on one side of the inverter housing to exchange the heat generated inside, thereby achieving a cooling effect on the inverter and keeping the interior of the inverter sealed. This solves the problem that the interior of the inverter is easily affected by moisture since it is connected to the outside world. This ensures that the inverter is sealed when cooling the inverter, thereby achieving a moisture-proof effect.

[0018] (2) The present application arranges a water pressure sensor on the outside of the liquid inlet box and uses the water pressure sensor to detect leaks in the circulating water circuit, thereby preventing coolant leakage from causing inverter cooling failure.

[0019] (3) The present application arranges a wind power component inside the inverter housing so that the heat inside the inverter housing can quickly contact and exchange heat with the heat exchange strips as the air flows, thereby preventing the heat exchange strips from being located on one side of the inverter housing and failing to exchange heat with the internal electrical components in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a wind turbine inverter cooling device disclosed in a preferred embodiment of the present application;

[0021] Figure 2 This is a schematic diagram of the assembly structure of the heat exchange tube and the circulation component in the wind turbine inverter cooling device disclosed in a preferred embodiment of the present application;

[0022] Figure 3 This is a structural schematic diagram of a circulation component in a wind turbine inverter cooling device disclosed in a preferred embodiment of the present application;

[0023] Figure 4 This is a schematic diagram of the structure of a heat exchange tube in a wind turbine inverter cooling device disclosed in a preferred embodiment of the present application;

[0024] Figure 5 The present invention is a schematic diagram of the internal structure of a converter housing in a wind turbine converter cooling device disclosed in a preferred embodiment of the present application.

[0025] Description of the numbers in the figure:

[0026] 1. Inverter housing; 11. Support plate; 12. Air intake hole; 13. Fan; 14. Air outlet hole;

[0027] 2. heat exchange strip; 21. liquid tank; 22. enclosure;

[0028] 3. Circulation assembly; 31. Side panel; 32. Liquid inlet box; 33. Liquid inlet branch pipe; 34. Reflux box; 35. Reflux branch pipe; 36. Heat sink; 37. Heat sink fin; 38. Current collector; 39. Water pump; 310. Diverter; 311. Water pressure sensor;

[0029] 4. Radiator;

[0030] 5. Siren. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] Reference below Figure 1-Figure 5 The present invention describes a wind turbine inverter cooling device and a cooling method thereof according to an embodiment of the present application.

[0033] Reference Figure 1-Figure 4 The embodiment of the present application discloses a cooling device for a frequency converter of a wind turbine set, comprising a frequency converter housing 1, wherein a wind power component is arranged inside the frequency converter housing 1; a plurality of heat exchange strips 2 are fixedly arranged on one side of the frequency converter housing 1, the heat exchange strips 2 are located inside the frequency converter housing 1, and a liquid tank 21 is opened on the inner side of the heat exchange strips 2, the heat exchange strips 2 are fixedly connected to one side of the frequency converter housing 1 through a surrounding plate 22, a circulation component 3 is fixedly arranged on the side of the heat exchange strips 2 away from the frequency converter housing 1, and the circulation component 3 comprises a side plate 31, the side plate 31 is fixedly arranged on the outer side of the liquid tank 21, and a liquid inlet box 32 and a reflux box 34 are fixedly arranged on the outer side of the side plate 31 corresponding to the two ends of the liquid tank 21, and a heat sink 36 is arranged between the liquid inlet box 32 and the reflux box 34.

[0034] When the heat is dissipated from the electrical components inside the inverter housing 1, the heat is brought out into the reflux box 34 through the coolant inside the heat exchange strip 2, and then flows into the heat sink 36 for heat dissipation. At this time, the interior of the inverter housing 1 is in a sealed state, and the wind power component inside the inverter housing 1 accelerates the dispersion of heat, so that the heat generated by the electrical components quickly contacts the heat exchange strip 2 for heat exchange, thereby achieving the effect of cooling the interior of the inverter housing 1.

[0035] In order to realize the circulation function of the circulation component 3 for the circulation of the coolant, refer to Figure 2 , Figure 3 and Figure 4 The circulation component 3 also includes a reflux branch pipe 35 for connecting the reflux box 34 and the heat sink 36. A collector 38 is fixedly arranged on the side of the heat sink 36 away from the reflux branch pipe 35. The liquid outlet end of the collector 38 is fixedly connected to the input end of a water pump 39. The water pump 39 is fixedly arranged on the outer side of the side plate 31. A diverter 310 is fixedly arranged at the output end of the water pump 39. The diverter 310 is fixedly connected to the liquid inlet box 32 through a plurality of liquid inlet branches 33.

[0036] The coolant is input into the liquid inlet box 32 through the liquid inlet branch pipe 33 by the water pump 39. When the coolant fills the liquid tank 21, it is collected in the reflux box 34 and then enters the heat sink 36 through the reflux branch pipe 35. At this time, the coolant is dissipated by the heat sink 36 to realize the recycling of the coolant.

[0037] In order to realize the heat dissipation function of the heat dissipation plate 36, refer to Figure 1 and Figure 2 A heat dissipation fin 37 is fixedly arranged on the outer side of the heat dissipation plate 36 , and a plurality of heat dissipation fins 37 are arranged. A radiator 4 is fixedly arranged on the outer side of the heat dissipation plate 36 .

[0038] The contact area between the heat dissipation plate 36 and the air is increased by the heat dissipation fins 37 , so that the radiator 4 can achieve rapid cooling when dissipating heat from the heat dissipation plate 36 .

[0039] In order to realize the function of wind power components, refer to Figure 1 and Figure 5 The wind power component includes a support plate 11 , an air intake hole 12 is opened inside the support plate 11 , a fan 13 is arranged inside the air intake hole 12 , and an air outlet hole 14 is also opened inside the support plate 11 , and the air outlet hole 14 is located outside the air intake hole 12 .

[0040] When the fan 13 is running and rotating, the heat inside the inverter housing 1 can be sucked into the air intake hole 12 and approach the heat exchange strip 2. After the heat is exchanged by the heat exchange strip 2, the heat is returned to the interior of the inverter housing 1 through the air outlet 14, so that the air inside the inverter housing 1 circulates and the heat exchange efficiency between the heat and the heat exchange strip 2 is accelerated.

[0041] In order to realize the anti-leakage detection function of the coolant, refer to Figure 1 and Figure 2 A water pressure sensor 311 is fixedly arranged on the outside of the liquid inlet box 32 or the reflux box 34 .

[0042] When the water pump 39 drives the coolant to circulate between the heat exchange strip 2, the liquid inlet box 32 and the reflux box 34, a certain water pressure will be generated inside the liquid inlet box 32 and the reflux box 34. At this time, the corresponding electrical signal can be detected by the water pressure sensor 311. When a leak occurs in the circulating water circuit, the detection value of the water pressure sensor 311 changes, so as to send a warning signal to the terminal.

[0043] Reference Figure 1 and Figure 4 An alarm 5 is fixedly arranged on the outer side of the enclosure 22 , and the alarm 5 is electrically connected to the controller inside the inverter housing 1 .

[0044] When the water pressure sensor 311 generates a warning signal, the controller inside the inverter housing 1 causes the alarm 5 to give an audible and visual warning, so as to find the corresponding inverter in time for maintenance.

[0045] In summary, when the inverter cooling device of the wind turbine set disclosed in the embodiment of the present application is in use, when the fan 13 inside the inverter housing 1 is running and rotating, the heat inside the inverter housing 1 can be sucked into the air intake hole 12 to approach the heat exchange strip 2, and after heat exchange through the heat exchange strip 2, it returns to the inside of the inverter housing 1 through the air outlet 14, so that the air inside the inverter housing 1 circulates and flows, thereby accelerating the heat exchange efficiency between the heat and the heat exchange strip 2; after heat exchange through the heat exchange strip 2, the coolant inside the liquid tank 21 carries the heat into the inside of the reflux box 34, and then enters the inside of the heat sink 36 through the reflux branch pipe 35, at which time the radiator 4 outside the heat sink 36 dissipates the heat; the coolant after heat exchange through the heat sink 36 is transported by the water pump 39 and input into the inside of the liquid inlet box 32 through the liquid inlet branch pipe 33, thereby forming a circulating water circuit;

[0046] When the water pump 39 drives the coolant to circulate between the heat exchange strip 2, the liquid inlet box 32 and the reflux box 34, a certain water pressure will be generated inside the liquid inlet box 32 and the reflux box 34. At this time, the corresponding electrical signal can be detected by the water pressure sensor 311. When a leak occurs in the circulating water circuit, the detection value of the water pressure sensor 311 changes, so as to send a warning signal to the terminal. When the water pressure sensor 311 generates a warning signal, the controller inside the inverter housing 1 enables the alarm 5 to issue an audible and visual warning.

[0047] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0048] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A wind turbine inverter cooling device, characterized in that: Include: A frequency converter housing, wherein a wind power component is arranged inside the frequency converter housing; A heat exchange bar, used to absorb heat inside the inverter housing, the heat exchange bar is fixedly arranged on one side of the inverter housing through a surrounding plate, a plurality of the heat exchange bars are arranged, a liquid tank is opened inside the heat exchange bar, and the heat exchange bars are all located inside the inverter housing; A circulation component is used to transport coolant to circulate inside the liquid tank. The circulation component includes a side plate, which is fixedly arranged on the outside of the liquid tank. A liquid inlet box and a reflux box are fixedly arranged at both ends of the outside of the side plate corresponding to the liquid tank, and a heat sink is arranged between the liquid inlet box and the reflux box.

2. The wind turbine inverter cooling device according to claim 1, characterized in that: The circulation component also includes a reflux branch pipe for connecting the reflux box and the heat sink. A collector is fixedly arranged on the side of the heat sink away from the reflux branch pipe. The liquid outlet end of the collector is fixedly connected to the input end of the water pump. The water pump is fixedly arranged on the outer side of the side plate. A diverter is fixedly arranged on the output end of the water pump. The diverter is fixedly connected to the liquid inlet box through a plurality of liquid inlet branches.

3. The wind turbine inverter cooling device according to claim 2, characterized in that: The outer side of the heat dissipation plate is fixedly provided with heat dissipation fins, a plurality of heat dissipation fins are provided, and the outer side of the heat dissipation plate is fixedly provided with a radiator.

4. The wind turbine inverter cooling device according to claim 1, characterized in that: The wind power component comprises a support plate, an air intake hole is provided on the inner side of the support plate, a fan is arranged on the inner side of the air intake hole, an air outlet hole is also provided on the inner side of the support plate, and the air outlet hole is located on the outer side of the air intake hole.

5. The wind turbine inverter cooling device according to claim 3, characterized in that: A water pressure sensor is fixedly arranged on the outside of the liquid inlet box or the reflux box.

6. The wind turbine inverter cooling device according to claim 1, characterized in that: An alarm is fixedly arranged on the outer side of the enclosure, and the alarm is electrically connected to a controller inside the inverter housing.

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