Cooling system and cabin main control cabinet with same

Abstract

The utility model discloses a cooling system and a cabin master control cabinet with the same, and relates to the field of cabin master control cabinet structures, the cooling system comprises an axial flow fan arranged on a cabinet body, an air outlet of the axial flow fan is connected with an input end of a first conveying pipe in a sealing manner, the first conveying pipe is provided with a plurality of output ends, each output end is connected with a cooling box, and the cooling box is connected with the cabinet body. All the cooling boxes can cool media entering the cooling boxes, and a medium outlet of each cooling box is connected with a second conveying pipe in a sealed mode, wherein the second conveying pipe is used for being connected with the cabinet body in a sealed mode; the first conveying pipe and the second conveying pipe are each provided with a thermometer, the thermometers are connected to a controller, and the controller is connected with all the cooling boxes. According to the utility model, the risk that one cooling box suddenly breaks down can be effectively solved, and cooling in the main control cabinet is ensured not to be influenced.

Description

Technical Field

[0001] This utility model relates to the field of cabin main control cabinet structure, and in particular to a cooling system and a cabin main control cabinet having the system. Background Technology

[0002] In the wind power sector, the nacelle control cabinet is located inside the nacelle atop the wind turbine. It is an electrical control unit whose main functions are to acquire signals from the actuators, transmit signals between the nacelle and other control subsystems, and output execution signals to the actuators. The actuators mainly include the pitch system, wind speed and direction control, hydraulic system, yaw system, and generator. Therefore, the nacelle control cabinet contains a large number of electrical components. Consequently, a significant amount of heat is generated within the control cabinet due to these components. This heat causes the internal temperature of the control cabinet to rise, which can affect the operation of the electrical components. Therefore, cooling the control cabinet is necessary.

[0003] The current common method involves opening an air outlet at the top, installing an axial flow fan at the outlet, and opening an air inlet at the bottom. The axial flow fan draws air outward, thus drawing cool air into the main control cabinet from the air inlet. The hot air inside the main control cabinet is then expelled by the axial flow fan, achieving the purpose of cooling. Although this method is effective in cooling, the presence of external air (air from inside the cabin, supplied by the axial flow fan used for cooling in the cooling compartment) introduces some dust. Dust can easily cause static electricity between electrical components, affecting or even damaging them. Therefore, with the development and widespread application of semiconductor cooling chips, those skilled in the art are further improving this method. For example, utility model patent with publication number "CN219042345U" discloses "A Fully Enclosed Electrical Control Cabinet". The "Automatic Heat Dissipation Device" uses semiconductor cooling chips directly installed on the cabinet to cool the interior. However, this method only provides localized cooling, which is not ideal for large main control cabinets in engine rooms. Uneven temperature distribution can easily lead to damage from thermal expansion and contraction of internal electrical components. Furthermore, those skilled in the art have considered adding a cooling box to the outside of the cabinet. The cooling source of the cooling box is a semiconductor cooling chip. An axial fan draws hot air from the cabinet, which is then cooled through the cooling box before being returned to the cabinet, thus achieving internal circulation. There is no exchange of air between the cabinet interior and the outside, which effectively cools the air while preventing the introduction of dust from the outside air. For example, Chinese Patent CN216489099U discloses a "Moisture-proof Device for PLC Control Cabinets".

[0004] Therefore, it can be seen that there are well-established technologies for cooling the main control cabinet in this field. However, since the semiconductor cooling chip is an electrical device, it is easily damaged, and there may be liquid leakage in the cooling box, which may lead to low heat exchange efficiency. It also has the possibility of limited service life or sudden failure, which may result in the failure of cooling the main control cabinet. However, those skilled in the art have not considered the existence of this problem. Therefore, a solution is needed to solve this technical problem. Utility Model Content

[0005] The purpose of this utility model is to provide a cooling system and a main control cabinet for the cabin that has the above-mentioned problems, which can effectively solve the risk of a sudden failure of a cooling box and ensure that the cooling and temperature reduction in the main control cabinet are not affected.

[0006] The technical solution adopted by this utility model is as follows: A cooling system includes an axial flow fan installed on a cabinet. The outlet of the axial flow fan is sealed to the input end of a first conveying pipe. The first conveying pipe has multiple output ends, each of which is connected to a cooling box. All cooling boxes can cool the medium entering the cooling box. The medium outlet of each cooling box is sealed to a second conveying pipe for sealing connection with the cabinet. A thermometer is installed on both the first and second conveying pipes. The thermometer is connected to a controller, and the controller is connected to all cooling boxes.

[0007] Furthermore, a solenoid valve is provided at the connection point between the delivery end of the first delivery pipe and the cooling box, and the solenoid valve is connected to the controller.

[0008] Furthermore, the cooling box includes a box body, one end of which has a medium inlet and the other end of which has a medium outlet; the upper part of the box body contains refrigerant, and a semiconductor cooling chip is disposed on the wall of the box body, one end of which is located inside the box body and the other end is located outside the box body; the semiconductor cooling chip is connected to a controller.

[0009] Furthermore, the cooling box also includes a cooling pipe passing through the box body, the cooling pipe being sealed to the box body, one end of the cooling pipe being the medium inlet of the cooling box, and the other end being the medium outlet of the cooling box, with the refrigerant submerging the cooling pipe.

[0010] Furthermore, the cooling pipes are connected to the housing by welding and sealant to achieve a sealed connection.

[0011] Furthermore, the cooling pipe includes multiple pipe bodies arranged parallel to each other with their axes parallel to each other. Both ends of all pipe bodies are connected to the same end cap, which is wide-mouthed. The small-diameter end of the end cap is connected to the first or second conveying pipe, and the large-diameter end of the end cap is connected to all pipe bodies through a tube sheet. The sum of the cross-sectional areas of all pipe bodies is greater than the cross-sectional area of ​​the first or second conveying pipe.

[0012] Furthermore, the sealed connection is a flange connection.

[0013] A naval main control cabinet with a cooling system includes a cabinet body and a cooling system for the naval main control cabinet, wherein the axial flow fan is located at the top of the cabinet body and the second delivery pipe is connected to the bottom of the cabinet body.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0015] This invention, by setting up multiple cooling boxes, ensures that when one cooling box malfunctions, such as the semiconductor cooling chip stopping or / and liquid leakage in the cooling box leading to low heat exchange efficiency, the air temperature before and after entering the cooling box does not change significantly. That is, the temperature obtained by the thermometer on the first delivery pipe is not much different from the temperature obtained by the thermometer on the second delivery pipe. The controller can then control the other cooling boxes to operate, ensuring that the air circulation between the cabinet and the cooling boxes can effectively, continuously, and stably reduce the temperature. This effectively solves the risk of a sudden failure of one cooling box and ensures that the cooling of the main control cabinet is not affected. Attached Figure Description

[0016] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] The markings in the diagram are: 1-cabinet; 2-axial flow fan; 3-solenoid valve; 4-first delivery pipe; 5-thermometer; 6-box; 7-semiconductor cooling chip; 8-end; 9-cooling pipe; 10-second delivery pipe; 11-cooling box. Detailed Implementation

[0019] In the description of this specification, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this specification and simplifying the description, and do not indicate or imply that the device or component 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 specification.

[0020] Furthermore, the use of terms such as "horizontal" or "vertical" in this specification does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0021] In the description of this specification, it should also be noted that, unless otherwise expressly specified and limited, the terms “set up,” “install,” “connect,” and “link” should be interpreted broadly. For example, a link can be a fixed link, a detachable link, or an integral link; it can be a mechanical link or an electrical link; it can be a direct link or an indirect link through an intermediate medium; it can be a connection within two components.

[0022] Example 1

[0023] like Figure 1 As shown, a cooling system includes an axial flow fan 2 mounted on a cabinet 1. The outlet of the axial flow fan 2 is sealed to the input end of a first conveying pipe 4. The first conveying pipe 4 has multiple output ends. In this embodiment, the first conveying pipe 4 has two output ends, each of which is connected to a cooling box 11, i.e., there are two cooling boxes 11. All cooling boxes 11 can cool the medium entering the cooling box 11. The medium outlet of the cooling box 11 is sealed to a second conveying pipe 10 for sealing connection with the cabinet 1. The first conveying pipe 4 and the second conveying pipe 10 are both equipped with thermometers 5, which are connected to a controller. The controller is connected to all cooling boxes 11.

[0024] Furthermore, the controller has an alarm system. When the temperature obtained by the thermometer 5 on the first delivery pipe 4 is not significantly different from the temperature obtained by the thermometer 5 on the second delivery pipe 10 (a set value can be set, and the difference is not significant, i.e., the absolute difference is within the set value), the controller can issue an alarm through the alarm system to notify the staff to repair or replace the current cooling box 11.

[0025] Specifically, the axial flow fan 2 draws hot air from the cabinet 1 and delivers it to the cooling box 11 through the first conveying pipe 4. The cooling box 11 cools the hot air to form cold air, which, driven by the air delivered by the axial flow fan 2, flows back to the cabinet 1 through the second conveying pipe 10, achieving internal circulation. There is no exchange of air between the inside of the cabinet 1 and the outside air, thus achieving effective cooling while preventing the introduction of dust from the outside air. In this embodiment, by setting multiple cooling boxes 11, if one of the cooling boxes 11 malfunctions, such as the semiconductor cooling chip 7 stopping working or / or liquid leakage in the cooling box 11 leading to low heat exchange efficiency, air will enter... There is no significant temperature change before and after entering the cooling box 11, that is, the temperature obtained by the thermometer 5 on the first conveying pipe 4 and the temperature obtained by the thermometer 5 on the second conveying pipe 10 are not much different (a set value can be set, and the difference is not much, that is, the absolute difference is within the set value). The controller can control other cooling boxes 11 to work in place of the original cooling box 11, and will alarm if the original cooling box 11 is faulty. Because other cooling boxes 11 are working, the air circulation between the cabinet 1 and the cooling boxes 11 can be effectively, continuously and stably cooled, thereby effectively solving the risk of a sudden failure of one cooling box 11 and ensuring that the cooling in the main control cabinet is not affected.

[0026] Furthermore, the controller can be the controller of the main control cabinet or an independent controller, preferably a compilable PLC.

[0027] Furthermore, the electrical energy required for the operation of the axial fan 2 and the cooling box (as described below, the semiconductor refrigeration chip) can be obtained from the power grid of the wind turbine generator, that is, the axial fan 2 and the cooling box are preferably connected to the controller of the main control cabinet.

[0028] Example 2

[0029] Based on Example 1, further feasible implementation methods are proposed.

[0030] In one feasible implementation, a solenoid valve 3 is provided at the connection position between the conveying end of the first conveying pipe 4 and the cooling box 11. The solenoid valve 3 is connected to the controller. Under the action of the controller, the solenoid valve 3 corresponding to the working cooling box 11 is opened, and the other solenoid valves 3 are closed, so as to prevent the hot air delivered by the axial flow fan 2 from flowing back from the unworking cooling box 11 to the cabinet 1, thereby improving the internal stability of the cooling cabinet 1.

[0031] In one feasible implementation, the cooling box 11 includes a box body 6, with a medium inlet at one end and a medium outlet at the other end. Refrigerant is contained inside the box body 6, and a semiconductor cooling chip 7 is mounted on the wall of the box body 6. One end of the semiconductor cooling chip 7 is located inside the box body 6, and the other end is located outside the box body 6. The semiconductor cooling chip 7 is connected to a controller. Under the control of the controller, the controller controls the end of the semiconductor cooling chip 7 located inside the box body 6 to be the cooling end, and the end located outside the box body 6 to be the heating end (controlling the cooling and heating ends only requires controlling the positive and negative polarity of the input of the semiconductor cooling chip 7), thereby cooling the refrigerant inside the box body 6. The refrigerant exchanges heat with the hot air entering the cooling box 11, causing the hot air to form cold air, which is then input into the cabinet 1, thereby cooling the interior of the cabinet 1.

[0032] Furthermore, the cooling tank 11 also includes a cooling pipe 9 passing through the tank body 6. The cooling pipe 9 is sealed to the tank body 6, and the sealing connection can be achieved by welding or sealant bonding. One end of the cooling pipe 9 is the medium inlet of the cooling tank 11, and the other end is the medium outlet of the cooling tank 11. The refrigerant submerges the cooling pipe 9. The cooling pipe 9 includes multiple pipes arranged parallel to each other along their axes. Both ends of all pipes are connected to the same end cap 8, which is wide-mouthed. The small-diameter end of the end cap 8 is connected to the first conveying pipe 4 or the second conveying pipe 10, and the large-diameter end of the end cap 8 is connected to all pipes through a tube sheet. The sum of the cross-sectional areas of all pipes is greater than the cross-sectional area of ​​the first conveying pipe 4 or the second conveying pipe 10. There are gaps between the pipes. This arrangement has at least the following advantages:

[0033] Firstly, hot air is divided into multiple paths to flow within the housing 6, thereby reducing the airflow and increasing the heat exchange area between the hot air and the coolant, ensuring efficiency and stability in reducing the temperature of the hot air.

[0034] Secondly, under unit flow rate, the sum of the cross-sectional areas of all pipes is greater than the cross-sectional area of ​​the first conveying pipe 4, the flow area increases and the flow velocity decreases, so it can effectively reduce the flow velocity of hot air through the box 6, thereby increasing the heat exchange time between hot air and coolant and ensuring the effectiveness of reducing the temperature of hot air.

[0035] Thirdly, under unit flow rate, the sum of the cross-sectional areas of all pipes is greater than that of the second conveying pipe 10, the flow area is reduced, the flow velocity of the cold air flowing out of the cooling box 11 is increased, the cold air holes entering the cabinet 1 have a larger flow velocity, the spray range of the cold air is larger, and the volume and position of action are more, thus improving the comprehensiveness of cooling the inside of the cabinet 1.

[0036] Example 3

[0037] Based on any of the embodiments in Examples 1-2, the sealed connection is a flange connection.

[0038] Example 4

[0039] A naval main control cabinet with a cooling system includes a cabinet body 1 and a cooling system for the naval main control cabinet described in any one of embodiments 1-3. The axial flow fan 2 is located at the top of the cabinet body 1, and the second delivery pipe 10 is connected to the bottom of the cabinet body 1 to prevent hot air from accumulating at the top of the cabinet body 1 and cold air from accumulating at the bottom of the cabinet body 1, thereby effectively improving the comprehensiveness and reliability of cooling the interior of the cabinet body 1.

[0040] This invention is not limited to the specific embodiments described above. This invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A cooling system, characterized in that: It includes an axial flow fan (2) installed on the cabinet (1), the outlet of the axial flow fan (2) is sealed to the input end of the first conveying pipe (4), the first conveying pipe (4) has multiple output ends, each output end is connected to a cooling box (11), all cooling boxes (11) can cool the medium entering the cooling box (11), the medium outlet of each cooling box (11) is sealed to a second conveying pipe (10) for sealing connection with the cabinet (1); thermometers (5) are installed on the first conveying pipe (4) and the second conveying pipe (10), the thermometers (5) are connected to a controller, and the controller is connected to the semiconductor cooling chip (7) of all cooling boxes (11).

2. The cooling system according to claim 1, characterized in that: A solenoid valve (3) is provided at the connection position between the conveying end of the first conveying pipe (4) and the cooling box (11), and the solenoid valve (3) is connected to the controller.

3. The cooling system according to claim 1, characterized in that: The cooling box (11) includes a box body (6), one end of which has a medium inlet and the other end of which has a medium outlet; the box body (6) contains refrigerant, and a semiconductor cooling chip (7) is provided on the wall of the box body (6), one end of which is located inside the box body (6) and the other end is located outside the box body (6); the semiconductor cooling chip (7) is connected to a controller.

4. The cooling system according to claim 3, characterized in that: The cooling box (11) also includes a cooling pipe (9) passing through the box body (6). The cooling pipe (9) is sealed to the box body (6). One end of the cooling pipe (9) is the medium inlet of the cooling box (11), and the other end is the medium outlet of the cooling box (11). The refrigerant submerges the cooling pipe (9).

5. The cooling system according to claim 4, characterized in that: The cooling pipe (9) is connected to the housing (6) by welding and sealant to achieve a sealed connection.

6. The cooling system according to claim 4, characterized in that: The cooling pipe (9) includes multiple pipes arranged parallel to each other with their axes parallel to each other. Both ends of all pipes are connected to the same end cap (8), which is wide-mouthed. The small-diameter end of the end cap (8) is connected to the first conveying pipe (4) or the second conveying pipe (10), and the large-diameter end of the end cap (8) is connected to all pipes through a tube sheet. The total cross-sectional area of ​​all pipes is greater than the cross-sectional area of ​​the first conveying pipe (4) or the second conveying pipe (10).

7. The cooling system according to any one of claims 1-6, characterized in that: The sealed connection is a flange connection.

8. A cabin main control cabinet with a cooling system, characterized in that: The cooling system includes a cabinet (1) and the main control cabinet of the cabin as described in any one of claims 1-7, wherein the axial flow fan (2) is located at the top of the cabinet (1) and the second delivery pipe (10) is connected to the bottom of the cabinet (1).

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