A cooling device and cooling method for wind turbine towers

Abstract

A cooling device and method for a wind turbine tower are disclosed. The cooling device includes: a tower body, a casing, and a trapezoidal air guide shell. The tower body has a tower cavity. The tower cavity has horizontally aligned ventilation openings on its front and rear side walls, with the ventilation openings protruding from the outer side wall of the tower body. The casing is installed on the inner wall of the tower cavity and located above the ventilation openings. The casing has mounting bases arranged from high to low inside, used for installing electrical equipment. The bottom of the casing has a box outlet. The trapezoidal air guide shell is installed on the inner wall of the tower cavity and located between the ventilation openings and the tower body. The trapezoidal air guide shell has a shell cavity, the upper end of which connects to the box outlet. The lower end of the shell cavity faces downwards and connects to the ventilation opening. The shell cavity has an inclined air guide wall, and the inner diameter of the shell cavity gradually decreases from the box outlet to the ventilation opening. This solution solves the problem of insufficient cooling of internal electrical equipment in existing wind turbines, leading to equipment damage and low operating efficiency.

Description

Technical Field

[0001] This invention relates to the field of wind turbines, and more particularly to a cooling device and method for cooling wind turbine towers. Background Technology

[0002] The wind turbine tower is the support structure of a wind turbine generator, primarily serving a supporting role while also absorbing vibrations. The cooling system inside the wind turbine tower is a crucial component ensuring the normal operation of the equipment. Generally, the main heat-generating components requiring cooling inside the wind turbine tower include the generator, gearbox, frequency converter, and control system. These devices generate a significant amount of heat during operation; if not dissipated promptly, overheating can occur, affecting efficiency and lifespan, and in severe cases, potentially causing a fire. Current wind turbine tower cooling methods mainly involve opening ventilation openings to directly cool the entire interior of the tower. However, the airflow does not directly reach the surrounding electrical equipment, resulting in poor cooling efficiency. Additionally, some existing wind turbine towers use air conditioning for direct cooling, but air conditioning installation is difficult, and electricity and maintenance costs are high, making long-term use impractical. Summary of the Invention

[0003] The purpose of this invention is to provide a cooling device for wind turbine towers. The mounting bases are distributed from high to low inside the chassis, and a trapezoidal air guide shell is installed at the bottom of the chassis. The convection generated by the two ventilation openings can use negative pressure to remove the air from the chassis, thereby continuously removing the heat from the chassis and achieving long-term cooling of the wind turbine tower.

[0004] The present invention also proposes a cooling method for cooling the wind turbine tower, which uses the aforementioned cooling device for the wind turbine tower.

[0005] To achieve this objective, the present invention adopts the following technical solution: A cooling device for a wind turbine tower includes: a tower body, a casing, and a trapezoidal air guide shell; The tower body has a tower cavity; the tower cavity has horizontally aligned ventilation openings on its front and rear side walls, the ventilation openings protruding from the outer side wall of the tower body; the chassis is installed on the inner wall of the tower cavity and located above the ventilation openings; the chassis has mounting bases arranged from high to low inside, the mounting bases being used to install electrical equipment; the bottom of the chassis has a box air outlet; the trapezoidal air guide shell is installed on the inner wall of the tower cavity and located between the ventilation openings and the tower body; The trapezoidal air guide shell has a cavity, the upper end of which is connected to the air outlet of the box; the lower end of which faces downward and is connected to the ventilation opening; the cavity has an inclined air guide wall, and the inner diameter of the cavity gradually decreases from the air outlet of the box to the ventilation opening.

[0006] Optimally, it may also include: water-cooling components; The water-cooling assembly includes: heat dissipation pipes, input pipes, and output pipes; The upper surface of the mounting base is provided with a mounting surface for installing electrical equipment. The heat dissipation pipes are distributed on the surface of the mounting surface or below the mounting surface. The input end of the input pipe is used to introduce cooling medium. The output end of the input pipe is connected to the input end of the heat dissipation pipe. The input end of the output pipe is connected to the output end of the heat dissipation pipe. The output end of the output pipe is used to discharge cooling medium.

[0007] Optimally, it may also include: a temperature detection device; The temperature detection device is mounted on the fixed base; The water-cooling assembly also includes: a solenoid valve; The output end of each input tube is connected to a heat dissipation pipe of a plurality of fixed bases, and each heat dissipation pipe is equipped with a solenoid valve; the temperature detection device is communicatively connected to the solenoid valve; the temperature detection device is used to open or close the solenoid valve according to the detected temperature.

[0008] Optimally, an inner layer is provided between the outer wall and the inner wall of the chassis, and the top wall of the chassis extends obliquely towards the direction of the air guide wall; the inner layer is distributed on the top wall of the chassis and the side wall of the air guide wall, and the inner layers are connected in sequence. The interior of the air guide inclined wall is provided with a flow guiding inner layer along the length direction. The upper end of the flow guiding inner layer is connected to the inner layer of the box, and the lower end of the flow guiding inner layer extends obliquely into the ventilation opening. The water-cooling assembly also includes: a tank cooling pipe; The input end of the cooling pipe is connected to one of the output ends of the input pipe, and the output end of the cooling pipe is connected to the inner layer of the chassis on the top wall. One of the solenoid valves is installed on the cooling pipe.

[0009] Alternatively, the tower body may have an interlayer between its outer sidewall and the inner sidewall of the tower cavity; the input pipe and the output pipe may be disposed in the interlayer. The water-cooling assembly also includes: a pump body, a suction pipe, and a water tank; The input end of the input pipe is connected to the pump body, one end of the suction pipe is connected to the pump body, and the other end of the suction pipe is connected to the water tank; the output end of the output pipe faces or is connected to the water tank.

[0010] Optimally, it also includes: a solar cooling component; The solar cooling assembly includes: solar cells, energy storage batteries, and an electric fan; The solar cell is disposed on the outside of the tower body and is electrically connected to the energy storage battery. The solar cell is used to charge the energy storage battery. The electric fan is disposed inside the chassis. The energy storage battery is electrically connected to the electric fan and is used to supply power to the electric fan.

[0011] Optimally, the energy storage battery is disposed on the upper surface of a portion of the mounting base; a cutout is provided between the upper and lower surfaces of the portion of the mounting base; the electric fan is installed in the cutout and is used to blow air downwards.

[0012] Optimally, one horizontal end of the vent is located inside the tower cavity, and the lower end of the air guide wall extends obliquely into the vent and is located between the top wall and the middle of the vent.

[0013] Optimally, it may also include: protective netting; The protective net is installed at the ventilation opening, and the protective net has a mesh opening.

[0014] A cooling method for wind turbine tower cooling, using the aforementioned wind turbine tower cooling device, includes the following steps: Step (1): The temperature detection device located on the fixed base detects the nearby temperature T0 in real time and feeds the temperature T0 back to the system. If the system detects that the temperature T0 is lower than the preset value T1, the electric fan and solenoid valve are kept closed, and only the ventilation port is used to cool the chassis. If the system detects that the temperature T0 is greater than or equal to the preset value T1, step (2) is executed. Step (2): If the system detects that the preset value T2 > temperature T0 ≥ preset value T1, the temperature detection device controls the electric fan to turn on; if the system detects that the temperature T0 of a certain temperature detection device > preset value T2, the temperature detection device controls the solenoid valve of the fixed base to open, the input pipe is the heat dissipation pipe to introduce the cooling medium, and the cooling medium is used to cool the fixed base at the same time, and the cooling medium is discharged from the output pipe; if the system detects that the temperature T0 of multiple temperature detection devices > preset value T2, step (3) is executed. Step (3): Multiple solenoid valves are opened, and the input pipe is also used to introduce cooling medium into the cooling pipe of the box. The cooling medium is used to cool the outer periphery of the box simultaneously. After the cooling medium flows through the inner layer of the box and the inner layer of the guide, it is discharged from the vent.

[0015] Compared with the prior art, one of the above technical solutions has the following beneficial effects: This solution provides a cooling device for wind turbine towers. The mounting bases are distributed from high to low inside the chassis, and a trapezoidal air guide shell is installed at the bottom of the chassis. The convection generated by the two ventilation openings can use negative pressure to remove the air from the chassis, thereby continuously removing heat from the chassis and achieving long-term cooling of the wind turbine tower. This solves the problem of the inability to cool the internal electrical equipment of existing wind turbines for a long time, which leads to equipment damage and low operating efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of one embodiment of the cooling device; Figure 2 yes Figure 1 Enlarged view of section A in the middle; Figure 3 yes Figure 1 Enlarged view of section B; Figure 4 This is a structural schematic diagram of one embodiment of the trapezoidal air guide shell; in: 1. Tower body; 2. Chassis; 3. Trapezoidal air guide shell; 4. Solar cooling module; 5. Water cooling module; 6. Temperature detection device; 7. Protective net; 8. Electrical equipment; Tower cavity 11; Ventilation opening 12; Fixing base 13; Hollowed-out opening 14; Fixing surface 15; Interlayer 16; Air outlet 21; Inner layer of the box 22; 31. Shell cavity; 32. Air guide inclined wall; 33. Inner flow guide layer; Solar cell 41, energy storage battery 42, electric fan 43; Heat dissipation pipe 51, input pipe 52, output pipe 53, solenoid valve 54, cooling pipe 55; pump body 56, suction pipe 57, water tank 58. Detailed Implementation

[0017] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0018] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," "inner side," "outer side," "inner end," "outer end," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish descriptive features, without any order or emphasis. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0019] like Figure 1-4 A cooling device for a wind turbine tower includes: a tower body 1, a casing 2, and a trapezoidal air guide shell 3; The tower body 1 is provided with a tower cavity 11; the tower cavity 11 is provided with horizontally aligned ventilation openings 12 on its front and rear side walls, the ventilation openings 12 protruding from the outer side wall of the tower body 1; the chassis 2 is installed on the inner wall of the tower cavity 11 and is located above the ventilation openings 12; the chassis 2 is provided with mounting bases 13 from high to low inside, the mounting bases 13 are used to install electrical equipment; the bottom of the chassis 2 is provided with a box air outlet 21; the trapezoidal air guide shell 3 is installed on the inner wall of the tower cavity 11 and is located between the ventilation openings 12 and the tower body 1; The trapezoidal air guide shell 3 is provided with a shell cavity 31. The upper end of the shell cavity 31 is connected to the air outlet 21 of the box. The lower end of the shell cavity 31 faces downward and is connected to the ventilation port 12. The shell cavity 31 is provided with an inclined air guide wall 32. The inner diameter of the shell cavity 31 gradually decreases from the air outlet 21 of the box to the ventilation port 12.

[0020] This solution provides a cooling device for a wind turbine tower. The mounting base 13 is distributed from high to low inside the casing 2, and the trapezoidal air guide shell 3 is installed at the bottom of the casing 2. The convection generated by the two ventilation ports 12 can use negative pressure to remove the air from the casing 2, thereby continuously removing the heat in the casing 2. This achieves long-term cooling of the wind turbine tower and solves the problem that the internal electrical equipment of existing wind turbines cannot be cooled for a long time, resulting in equipment damage and low operating efficiency.

[0021] Specifically, the tower body 1 has a tower cavity 11 inside, and ventilation openings 12 are provided at the front and rear positions of the tower cavity 11. Generally, the ventilation openings 12 face the wind direction in which the fan blades of the wind turbine are facing. The two ventilation openings 12 are aligned in a straight line. External air enters the tower cavity 11 from one ventilation opening 12 and exits from the other ventilation opening 12, thereby carrying away the heat inside the tower cavity 11 and dissipating heat from the entire tower cavity 11. Meanwhile, because the vents 12 are aligned in a straight line, the airflow velocity is highest and the pressure is lowest in the central axis area, while the airflow velocity is lower and the pressure is relatively higher in the area far from the central axis. This pressure difference causes the airflow to concentrate in the central axis area, forming a relatively stable straight airflow. The chassis 2 is located above the vents 12, and it has multiple mounting seats 13 inside, which are distributed from high to low. The electrical equipment is also distributed from high to low. The electrical equipment generates heat during operation and releases it into the chassis 2. To address this, the bottom of the chassis 2 exposes the air outlet 21. In this design, a trapezoidal air guide shell 3 is installed at the bottom of the chassis 2. The cavity 31 of the trapezoidal air guide shell 3 is connected to the air outlet 21 at the top and faces one of the vents 12 at the bottom. The guide wall 32 of the inner wall of the cavity 31 extends obliquely, narrowing its inner diameter. The inner diameter of the cavity 31 gradually decreases from the air outlet 21 to the vent 12. When air enters and exits the aligned vents 12, it is... The electrical equipment on the fixed base 13 is far from the central axis area of ​​the airflow. In addition, the heat generated by the electrical equipment causes the local air pressure to rise, and the air near the electrical equipment flows from the high-pressure area to the low-pressure area. That is, the air flows towards the trapezoidal air guide shell 3 and is output downward through the air outlet 21 into the shell cavity 31. The lower end of the shell cavity 31 faces and is connected to the ventilation port 12. A pressure difference is formed between the ventilation port 12 and the shell cavity 31. When the air flows horizontally through the central axis area, the air in the shell cavity 31 is drawn in by the pressure difference, thereby taking away the air near the electrical equipment inside the chassis 2, thereby taking away the heat around the electrical equipment. Furthermore, gaps are used between the sides of the chassis 2, or a small hole 24 is designed on the top of the chassis 2, so that the chassis 2 draws in some new air from the tower cavity 11. In this way, this solution can cool the chassis 2 for a long time, solving the problem that the internal electrical equipment of the existing wind turbine cannot be cooled for a long time, resulting in equipment damage and low operating efficiency.

[0022] Optimally, it also includes: water-cooling component 5; The water-cooling component 5 includes: a heat dissipation pipe 51, an input pipe 52, and an output pipe 53; The upper surface of the mounting base 13 is provided with a mounting surface 15 for installing electrical equipment. The heat dissipation pipes 51 are distributed on the surface of the mounting surface 15 or below the mounting surface 15. The input end of the input pipe 52 is used to introduce cooling medium, and the output end of the input pipe 52 is connected to the input end of the heat dissipation pipe 51. The input end of the output pipe 53 is connected to the output end of the heat dissipation pipe 51, and the output end of the output pipe 53 is used to discharge cooling medium.

[0023] The mounting base 13 can be provided with a mounting surface 15 on the side of the cutout 14. The mounting surface 15 is provided with heat dissipation pipes 51, which can be distributed in multiple bends on the mounting surface 15. The input pipe 52 inputs the cooling medium into the heat dissipation pipes 51, and the heat dissipation pipes 51 output the cooling medium through the output pipe 53. The cooling medium is a fluid with a temperature lower than that of the chassis 2, such as air or water. When the electrical equipment is fixed on the mounting surface 15, if the temperature of the electrical equipment is too high and the heat cannot be dissipated in time through the vent 12, the water cooling component 5 can be used. The cooling medium passes through the heat dissipation pipes 51, thereby removing the heat near the heat dissipation pipes 51, thereby providing emergency heat dissipation for the electrical equipment and achieving dual heat dissipation.

[0024] Optimally, it also includes: a temperature detection device 6; The temperature detection device 6 is mounted on the fixed base 13; The water-cooling assembly 5 also includes: a solenoid valve 54; The output end of a single input tube 52 is connected to a plurality of heat dissipation pipes 51 of the fixed bases 13, and each heat dissipation pipe 51 is equipped with a solenoid valve 54; the temperature detection device 6 is communicatively connected to the solenoid valve 54; the temperature detection device 6 is used to open or close the solenoid valve 54 according to the detected temperature.

[0025] The temperature detection device 6 is located on the fixed base 13 near the electrical equipment and is used to detect the temperature near the fixed base 13. If the temperature detected by the temperature detection device 6 significantly exceeds the normal heat dissipation capacity of the vent 12, a temperature range can be preset for the temperature detection device 6. If the temperature detected by the temperature detection device 6 exceeds the preset temperature range, the temperature detection device 6 can control the solenoid valve 54 to open, and the input pipe 52 outputs cooling medium to the heat dissipation pipe 51 of the solenoid valve 54. The cooling medium carries away the heat near the electrical equipment, thereby realizing the function of emergency directional cooling.

[0026] The communication connection method here refers to the communication established between connected devices through signal transmission and interaction, which can be divided into wired connection and wireless connection; wired connection is such as conventional data cable connection; wireless connection is such as conventional WiFi, Bluetooth, infrared, NFC, etc.

[0027] Optimally, an inner layer 22 is provided between the outer wall and the inner wall of the chassis 2, and the top wall of the chassis 2 extends obliquely toward the direction of the air guide wall 32; the inner layer 22 is distributed on the top wall of the chassis 2 and the side wall of the air guide wall 32, and the inner layers 22 are connected in sequence. The interior of the air guide inclined wall 32 is provided with a flow guiding inner layer 33 along the length direction. The upper end of the flow guiding inner layer 33 is connected to the inner layer 22 of the box, and the lower end of the flow guiding inner layer 33 extends obliquely into the ventilation opening 12. The water-cooling assembly 5 also includes: a box cooling pipe 55; The input end of the cooling pipe 55 is connected to one of the output ends of the input pipe 52, and the output end of the cooling pipe 55 is connected to the inner layer 22 of the chassis 2 on the top wall. One of the solenoid valves 54 is installed on the cooling pipe 55.

[0028] In this solution, the water-cooling component 5 can provide secondary cooling for the electrical equipment on the mounting base 13 using the heat dissipation pipes 51, and also provide tertiary cooling for the entire chassis 2. Specifically, the chassis 2 has an inner layer 22, located on both the outer and inner walls of the chassis 2. The inner layer 22 reduces the weight of the chassis 2, making it easier to carry. Simultaneously, the top wall of the chassis 2 is inclined, and the inner layer 22 is distributed on the top wall, extending at an angle. Another inner layer 22 is located on the side wall of the chassis 2 near the upper part of the inclined air guide wall 32. Furthermore, the interior of the inclined air guide wall 32 has a guide layer 33 along its length, one end of which connects to the inner layer 22 on the upper side wall of the chassis 2. Thus, the inner layer 22 on the top wall of the chassis 2, the inner layer 22 on the side wall of the chassis 2, and the guide layer 33 on the inclined air guide wall 32 provide tertiary cooling. The components are connected sequentially; the output end of the cooling pipe 55 is connected to the inner layer 22 of the top wall of the chassis 2. Since the inner layer 22 of the top wall of the chassis 2 is inclined downward, after receiving the cooling medium (e.g., water) from the cooling pipe 55, it can guide the cooling medium to flow obliquely along the inner layer 22 of the chassis 2 on the side, thereby driving the heat around the outer perimeter of the chassis 2; when the temperature detection device 6 of the multiple fixed seats 13 detects that the temperature at multiple locations exceeds the preset temperature range, the solenoid valve 54 of the cooling pipe 55 can be activated. After the cooling medium surrounds the inner layer 22 of the chassis 2, it is discharged from the inner guide layer 33 of the air guide wall 32; since the air guide wall 32 is inclined, the cooling medium is discharged from the inner guide layer 33 at an inclined angle into the vent 12. Under the action of the straight convection of the vent 12, the cooling medium is accelerated to be discharged outside the vent 12. Meanwhile, in some embodiments, the vent 12 is equipped with a protective net 7, and the cooling medium falls to contact the protective net 7, thereby washing the protective net 7.

[0029] Alternatively, the tower body 1 may have an interlayer 16 between its outer sidewall and the inner sidewall of the tower cavity 11; the input pipe 52 and the output pipe 53 may be disposed in the interlayer 16. The water-cooling assembly 5 also includes: a pump body 56, a water suction pipe 57, and a water tank 58; The input end of the input pipe 52 is connected to the pump body 56, one end of the suction pipe 57 is connected to the pump body 56, and the other end of the suction pipe 57 is connected to the water tank 58; the output end of the output pipe 53 is oriented toward or connected to the water tank 58.

[0030] Pump body 56 draws water from water tank 58 through suction pipe 57 and delivers the water to input pipe 52. Input pipe 52 pumps the water from bottom to top to heat dissipation pipe 51, thereby cooling the mounting base 13 of the electrical equipment and providing emergency heat dissipation for the electrical equipment. Heat dissipation pipe 51 then delivers the water to output pipe 53, and output pipe 53 outputs the water back to water tank 58, realizing water recycling. At the same time, water tank 58 can be set at the bottom of wind turbine tower. Pump body 56 supplies water cooling for different mounting bases 13. When temperature detection device 6 detects that the temperature of a certain mounting base 13 is high, it can control solenoid valve 54 to open, thereby providing emergency cooling for one or more electrical equipment.

[0031] Optimally, it also includes: a solar cooling component 4; The solar cooling component 4 includes: a solar cell 41, an energy storage battery 42, and an electric fan 43; The solar cell 41 is disposed on the outside of the tower body 1 and is electrically connected to the energy storage battery 42. The solar cell 41 is used to charge the energy storage battery 42. The electric fan 43 is disposed inside the chassis 2. The energy storage battery 42 is electrically connected to the electric fan 43 and is used to supply power to the electric fan 43.

[0032] This design allows for the installation of an electric fan 43 inside the chassis 2. The electric fan 43 improves airflow within the chassis 2, thereby accelerating air output to the outside of the shell cavity 31. Furthermore, this design utilizes a solar cell 41, located externally on the tower body 1, to convert solar energy into electrical energy, which is then stored in an energy storage battery 42. During the day, the solar cell 41 converts solar energy into electricity and stores it in the energy storage battery 42. When the temperature of the chassis 2 becomes too high, the energy storage battery 42 can be activated, acting as the electric fan 43, thereby improving airflow within the chassis 2 and increasing the speed of air output to the central axis region. The electric fan 43 can be communicatively connected to the temperature detection device 6.

[0033] Alternatively, the energy storage battery 42 is disposed on the upper surface of a portion of the fixing base 13; a cutout 14 is provided between the upper and lower surfaces of the portion of the fixing base 13; the electric fan 43 is installed in the cutout 14 and is used to blow air downwards.

[0034] A mounting base 13 at a certain location can be used to fix an energy storage battery 42 (the energy storage battery 42 can be seen as an electrical device); since the interior of the chassis 2, the cavity 31 and the vent 12 are connected in sequence, the energy storage battery 42 is connected to the solar cell 41 through wires, and the wires can be distributed between the chassis 2, the cavity 31 and the vent 12; the cutout 14 is located between the upper and lower surfaces of the mounting base 13, and the electric fan 43 is set in the cutout 14 of the mounting base 13. When the electrical device is installed on the upper surface of the mounting base 13 with the cutout 14, the electric fan 43 blows air downwards, and the air can flow downwards, thereby accelerating the downward flow of air inside the chassis 2; or the mounting base 13 with the cutout 14 is left empty, and only the electric fan 43 is installed. The electric fan 43 can improve the airflow between the two electrical devices, thereby promoting heat dissipation between the three adjacent mounting bases 13.

[0035] Optimally, one horizontal end of the vent 12 is located inside the tower cavity 11, and the lower end of the guide wall 32 extends obliquely into the vent 12 and is located between the top wall and the middle of the vent 12.

[0036] Ventilation opening 12 is located on the side wall of tower cavity 11, and has a certain horizontal length, extending horizontally into the tower cavity 11. Simultaneously, the length of the guide wall 32 can be designed to be slightly longer, allowing its lower end to extend downwards into the ventilation opening 12. This brings the negative pressure generation point of the trapezoidal air guide shell 3 closer to the tower cavity 11, thereby reducing the impact of external airflow on cooling and improving the cooling effect. Furthermore, since the lower end of the guide wall 32 extends inclined into the ventilation opening 12, when external rainwater enters the ventilation opening 12, if the rainwater is about to enter the trapezoidal air guide shell 3, the guide wall 32 guides the rainwater downwards. The trapezoidal air guide shell 3 also extends the distance between the ventilation opening 12 and the chassis 2, thereby improving the waterproof effect.

[0037] Optimally, it also includes: protective netting 7; The protective net 7 is installed at the ventilation opening 12, and the protective net 7 has a mesh opening.

[0038] The protective net 7 is installed at the ventilation opening 12. The opening of the protective net 7 allows airflow to pass through normally, while the size of the opening restricts the entry of large objects. It mainly prevents birds and animals from entering through the ventilation opening 12, thereby preventing birds and animals from entering the tower cavity 11 and affecting the normal operation of the electrical equipment.

[0039] A cooling method for wind turbine tower cooling, using a wind turbine tower cooling device according to any of the above embodiments, includes the following steps: Step (1): The temperature detection device 6 located on the fixed base 13 detects the nearby temperature T0 in real time and feeds the temperature T0 back to the system. If the system detects that the temperature T0 is lower than the preset value T1, the electric fan 43 and the solenoid valve 54 are kept closed, and only the ventilation port 12 is used to cool the chassis 2. If the system detects that the temperature T0 is greater than or equal to the preset value T1, step (2) is executed. Step (2): If the system detects that the preset value T2 > temperature T0 ≥ preset value T1, the temperature detection device 6 controls the electric fan 43 to turn on; if the system detects that the temperature T0 of a certain temperature detection device 6 > preset value T2, the temperature detection device 6 controls the solenoid valve 54 of the fixed base 13 to open, the input pipe 52 is the heat dissipation pipe 51 to introduce the cooling medium, and the cooling medium is used to cool the fixed base 13 at the same time, and the cooling medium is discharged from the output pipe 53; if the system detects that the temperature T0 of multiple temperature detection devices 6 > preset value T2, step (3) is executed. Step (3): Multiple solenoid valves 54 are opened, and the input pipe 52 is also used to introduce cooling medium into the cooling pipe 55 of the box. The cooling medium is used to cool the outer periphery of the box 2 simultaneously. After the cooling medium flows through the inner layer 22 and the inner guide layer 33 of the box, it is discharged from the vent 12.

[0040] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cooling device for a wind turbine tower, characterized in that, Includes: tower body, chassis, trapezoidal air guide shell, water cooling components and temperature detection device; The tower body has a tower cavity; the tower cavity has horizontally aligned ventilation openings on its front and rear side walls, the ventilation openings protruding from the outer side wall of the tower body; the chassis is installed on the inner wall of the tower cavity and located above the ventilation openings; the chassis has mounting bases arranged from high to low inside, the mounting bases being used to install electrical equipment; the bottom of the chassis has a box air outlet; the trapezoidal air guide shell is installed on the inner wall of the tower cavity and located between the ventilation openings and the tower body; The trapezoidal air guide shell has a cavity, the upper end of which is connected to the air outlet of the box; the lower end of the cavity faces downward and is connected to the ventilation opening. The shell cavity is provided with an inclined air guide wall, and the inner diameter of the shell cavity gradually decreases from the air outlet of the box to the ventilation opening; The water-cooling assembly includes: heat dissipation pipes, input pipes, output pipes, and solenoid valves; The upper surface of the mounting base is provided with a mounting surface for installing electrical equipment, and the heat dissipation pipes are distributed on the surface of the mounting surface or below the mounting surface; the input end of the input pipe is used to introduce cooling medium, the output end of the input pipe is connected to the input end of the heat dissipation pipe, the input end of the output pipe is connected to the output end of the heat dissipation pipe, and the output end of the output pipe is used to discharge cooling medium. The temperature detection device is mounted on the fixed base; The output end of each input tube is connected to a heat dissipation pipe of a plurality of fixed bases, and each heat dissipation pipe is equipped with a solenoid valve; the temperature detection device is communicatively connected to the solenoid valve; the temperature detection device is used to open or close the solenoid valve according to the detected temperature.

2. The cooling device for a wind turbine tower according to claim 1, characterized in that, An inner layer is provided between the outer wall and the inner wall of the chassis, and the top wall of the chassis extends inclined towards the air guide wall; the inner layer is distributed on the top wall of the chassis and the side wall of the air guide wall, and the inner layers are connected in sequence. The interior of the air guide inclined wall is provided with a flow guiding inner layer along the length direction. The upper end of the flow guiding inner layer is connected to the inner layer of the box, and the lower end of the flow guiding inner layer extends obliquely into the ventilation opening. The water-cooling assembly also includes: a tank cooling pipe; The input end of the cooling pipe is connected to one of the output ends of the input pipe, and the output end of the cooling pipe is connected to the inner layer of the chassis on the top wall. One of the solenoid valves is installed on the cooling pipe.

3. The cooling device for a wind turbine tower according to claim 1, characterized in that, The tower body has an interlayer between its outer side wall and the inner side wall of the tower cavity; the input pipe and the output pipe are disposed in the interlayer. The water-cooling assembly also includes: a pump body, a suction pipe, and a water tank; The input end of the input pipe is connected to the pump body, one end of the suction pipe is connected to the pump body, and the other end of the suction pipe is connected to the water tank; the output end of the output pipe faces or is connected to the water tank.

4. A cooling device for a wind turbine tower according to any one of claims 1-3, characterized in that, It also includes: solar cooling components; The solar cooling assembly includes: solar cells, energy storage batteries, and an electric fan; The solar cell is disposed on the outside of the tower body and is electrically connected to the energy storage battery. The solar cell is used to charge the energy storage battery. The electric fan is disposed inside the chassis. The energy storage battery is electrically connected to the electric fan and is used to supply power to the electric fan.

5. A cooling device for a wind turbine tower according to claim 4, characterized in that, The energy storage battery is disposed on the upper surface of part of the fixing base; a hollow opening is provided between the upper and lower surfaces of part of the fixing base; the electric fan is installed in the hollow opening and is used to blow air downwards.

6. A cooling device for a wind turbine tower according to any one of claims 1-3, characterized in that, One horizontal end of the vent is located inside the tower cavity, and the lower end of the air guide wall extends obliquely into the vent and is located between the top wall and the middle of the vent.

7. A cooling device for a wind turbine tower according to any one of claims 1-3, characterized in that, Also includes: Protective netting; The protective net is installed at the ventilation opening, and the protective net has a mesh opening.

8. A cooling method for cooling a wind turbine tower, using a cooling device for a wind turbine tower as described in any one of claims 1-7, characterized in that, Includes the following steps: Step (1): The temperature detection device located on the fixed base detects the nearby temperature T0 in real time and feeds the temperature T0 back to the system. If the system detects that the temperature T0 is lower than the preset value T1, the electric fan and solenoid valve are kept closed, and only the ventilation port is used to cool the chassis. If the system detects that the temperature T0 is greater than or equal to the preset value T1, step (2) is executed. Step (2): If the system detects that the preset value T2 > temperature T0 ≥ preset value T1, the temperature detection device controls the electric fan to turn on; if the system detects that the temperature T0 of a certain temperature detection device > preset value T2, the temperature detection device controls the solenoid valve of the fixed base to open, the input pipe is the heat dissipation pipe to introduce the cooling medium, and the cooling medium is used to cool the fixed base at the same time, and the cooling medium is discharged from the output pipe; if the system detects that the temperature T0 of multiple temperature detection devices > preset value T2, step (3) is executed. Step (3): Multiple solenoid valves are opened, and the input pipe is also used to introduce cooling medium into the cooling pipe of the box. The cooling medium is used to cool the outer periphery of the box simultaneously. After the cooling medium flows through the inner layer of the box and the inner layer of the guide, it is discharged from the vent.

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