Cooling system of cabin main control cabinet and cabin main control cabinet

Abstract

The utility model discloses a cooling system of a cabin main control cabinet and the cabin main control cabinet, and relates to the field of cabin main control cabinet structures, the cooling system comprises at least two axial flow fans arranged on a cabinet body, and air outlets of the multiple axial flow fans are connected to the input end of a first conveying pipe in a sealed mode; the output end of the first conveying pipe is in sealed connection with a medium inlet of a cooling box, the cooling box can cool a medium entering the cooling box, and a medium outlet of the cooling box is in sealed connection with a second conveying pipe used for being in sealed connection with the cabinet body. A flow meter is arranged on the first conveying pipe or / and the second conveying pipe, the flow meter is connected to a controller, and the controller is connected with all the axial flow fans. According to the utility model, the risk that one axial flow fan suddenly breaks down and shuts down can be effectively solved, and the cooling in the main control cabinet is not influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of cabin main control cabinet structure, especially a kind of cooling system of cabin main control cabinet and cabin main control cabinet. BACKGROUND

[0002] In the field of wind power, the cabin main control cabinet is placed inside the cabin located at the top of the wind turbine, which is an electric control device. Its main function is to collect signals from the execution components, transmit signals between other control subsystems and output execution signals to the execution components. The execution components mainly include the variable pitch system, wind speed and direction, hydraulic system, yaw system and generator, etc. Therefore, there are a large number of electrical components in the cabin main control cabinet. As a result, a large amount of heat is generated in the cabin main control cabinet due to the presence of a large number of electrical components. This heat will cause the internal temperature of the main control cabinet to rise, which will affect the operation of the electrical components in the main control cabinet. Therefore, the main control cabinet needs to be cooled.

[0003] The current common method is to open an air outlet at the top, install an axial flow fan at the air outlet, open an air inlet at the bottom, and the axial flow fan draws air outward, thereby achieving the absorption of cold air from the air inlet into the main control cabinet, and the high-temperature air in the main control cabinet is sent out through the axial flow fan, thereby achieving the purpose of cooling. Although this method can effectively cool, since external air (air in the cabin, which is sent into the cabin by the axial flow fan used for cooling the cabin) enters, it will bring in some dust, which can easily cause static electricity between electrical components, affecting or damaging electrical components. With the development and application of semiconductor refrigerating fins, the technical personnel in this field further improve it, such as the utility model patent with publication number "CN219042345U" which discloses "an automatic heat dissipation device for a fully enclosed electrical control cabinet". This method uses semiconductor refrigerating fins directly installed on the cabinet body to cool the inside of the cabinet body. This cooling method can only cool locally. For a large cabin main control cabinet, it cannot achieve overall cooling and the cooling temperature distribution is uneven, which is more likely to cause thermal expansion and contraction damage to internal electrical components. Further, the technical personnel in this field think of adding a cooling box outside the electrical cabinet, and the cooling source of the cooling box is a semiconductor refrigerating fin. After the hot air in the cabinet body is extracted by the axial flow fan, it is cooled by the cooling box, and then sent into the cabinet body, i.e. realizing internal circulation, and there is no exchange between the inside of the cabinet body and the outside air, thereby achieving effective cooling while avoiding the introduction of dust mixed in the outside air.

[0004] Therefore, it can be known that the cooling of the main control cabinet has perfect technology in the art, since the axial flow fan is an electrical device, it is prone to failure, shutdown or low power, thereby leading to the failure of the main control cabinet cooling; and the skilled in the art do not consider the existence of the problem, thus, a scheme is needed to solve the technical problem. Content of the utility model

[0005] The utility model discloses to the purpose at: for above-mentioned problem, provide a kind of cooling system of machine cabin main control cabinet and machine cabin main control cabinet, can effectively solve the risk of sudden shutdown of one axial flow fan, guarantee the cooling of main control cabinet is not affected.

[0006] The utility model discloses the technical scheme as follows: a kind of cooling system of machine cabin main control cabinet, including at least two axial flow fans being arranged on cabinet body, the air outlet of multiple axial flow fans is sealingly connected to the input end of first conveying pipe, the output end of first conveying pipe is sealingly connected with the medium inlet of cooling box, cooling box can cool the medium that enters cooling box, the medium outlet of cooling box is sealingly connected with the second conveying pipe for sealingly connected with cabinet body;Flow meter is provided on the first conveying pipe or / and second conveying pipe, the flow meter is connected to controller, the controller is all connected with all axial flow fans.

[0007] Further, the axial flow fan and the first conveying pipe are sealingly connected by air pipe, the electromagnetic valve is provided on the air pipe, and the electromagnetic valve is connected with the controller.

[0008] Further, the cooling box includes a box body, one end of the box body has a medium inlet, and the other end of the box body has a medium outlet; the box body contains refrigerant liquid, and a semiconductor refrigerating fin is arranged on the wall of the box body, one end of the semiconductor refrigerating fin is located in the box body, and the other end is located outside the box body; the semiconductor refrigerating fin is connected to the controller.

[0009] Further, the cooling box further includes a cooling pipe penetrating through the box body, the cooling pipe is sealingly connected with the box body, one end of the cooling pipe is the medium inlet of the cooling box, the other end is the medium outlet of the cooling box, and the refrigerant liquid submerges the cooling pipe.

[0010] Further, the cooling pipe and the box body are connected by welding and sealing glue to realize sealing connection.

[0011] Further, the cooling pipe includes a plurality of pipe bodies, the plurality of pipe bodies are arranged in parallel with the same axis, both ends of all the pipe bodies are connected to the same head, the head is wide-mouthed, the small-diameter end of the head is connected to the first conveying pipe or the second conveying pipe, and the large-diameter end of the head is connected to all the pipe bodies through a pipe plate; the cross-sectional area of all the pipe bodies is larger than that of the first conveying pipe or the second conveying pipe.

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

[0013] The cabin main control cabinet comprises a cabinet body and the cooling system of the cabin main control cabinet, the axial flow fan is located at the top of the cabinet body, and the second conveying pipe is connected to the bottom of the cabinet body.

[0014] Therefore, the cabin main control cabinet has the advantages that:

[0015] The cabin main control cabinet has the advantages that: when one of the axial flow fans fails or has low power, the controller can control other axial flow fans to work to ensure uninterrupted air circulation between the cabinet body and the cooling box, thereby effectively solving the risk of sudden shutdown of one axial flow fan and ensuring that cooling and temperature reduction in the main control cabinet are not affected. BRIEF DESCRIPTION OF DRAWINGS

[0016] The cabin main control cabinet will be described by way of example and with reference to the accompanying drawings, in which:

[0017] Figure 1 The cabin main control cabinet will be described by way of example and with reference to the accompanying drawings, in which:

[0018] In the drawings, 1 is a cabinet body, 2 is an axial flow fan, 3 is an electromagnetic valve, 4 is a first conveying pipe, 5 is a flow meter, 6 is a box body, 7 is a semiconductor refrigeration sheet, 8 is a head, 9 is a cooling pipe, and 10 is a second conveying pipe. DETAILED DESCRIPTION

[0019] In the description of the present specification, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the product in use, they are only for the convenience of describing the present specification and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present specification.

[0020] In addition, in the description of the present specification, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0021] In the description of the present specification, it also needs to be explained that, unless otherwise explicitly specified and limited, if the terms "arrangement", "installation", "connection", "connection" appear, they should be understood broadly, for example, the connection can be fixed connection, or detachable connection, or integrally connected; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, can be the communication inside two elements.

[0022] Embodiment 1

[0023] As Figure 1 shown, a cooling system of a machine cabin main control cabinet, comprising at least two axial flow fans 2 arranged on the cabinet body 1, the axial flow fans 2 of the embodiment are two; the air outlets of the plurality of axial flow fans 2 are sealingly connected to the input end of the first conveying pipe 4, the output end of the first conveying pipe 4 is sealingly connected with the medium inlet of the cooling box, the cooling box can cool the medium entering the cooling box, the medium outlet of the cooling box is sealingly connected with the second conveying pipe 10 for sealingly connecting with the cabinet body 1; the first conveying pipe 4 or / and the second conveying pipe 10 is provided with a flow meter 5, the flow meter 5 is connected to a controller, and the controller is connected with all the axial flow fans 2.

[0024] Further, the controller has an alarm system, when the flow meter 5 obtains low flow or does not obtain flow data, the controller alarms through the alarm system to inform the staff to repair and replace the current axial flow fan 2.

[0025] Specifically, the axial flow fan 2 extracts the hot air in the cabinet body 1 and conveys it to the cooling box through the first conveying pipe 4, the cooling box cools the hot air to form cold air, which is again returned to the cabinet body 1 through the second conveying pipe 10 under the pushing of the axial flow fan 2 conveying air, realizing internal circulation, and the inside of the cabinet body 1 is not exchanged with the outside air, so as to realize effective cooling while avoiding the introduction of dust mixed in the outside air; in the embodiment, by arranging multiple axial flow fans 2, when one of the axial flow fans 2 works, the controller obtains low flow or no flow data of the flow meter 5, the controller can control other axial flow fans 2 to replace the original axial flow fan 2 to work, and consider that the original axial flow fan 2 fails to alarm; because there are other axial flow fans 2 working, the air circulation between the cabinet body 1 and the cooling box is uninterrupted, thereby effectively solving the risk of sudden shutdown of one axial flow fan 2 and ensuring the cooling and cooling of the main control cabinet.

[0026] It should be noted that, of course, when the temperature in the cabinet is too high, multiple or all axial flow fans 2 can be started at the same time to achieve the purpose of rapid cooling.

[0027] Further, the controller can be a controller of the main control cabinet or an independent controller, and the model is preferably a programmable logic controller (PLC).

[0028] Further, the flow meter 5 is a gas flow meter 5, preferably a vortex flow meter 5.

[0029] Further, the electric energy required for the operation of the axial flow fan 2 and the cooling box (semiconductor refrigeration sheet in the following) can be obtained from the power grid of the wind turbine, that is, the axial flow fan 2 and the cooling box are preferably connected to the controller of the main control cabinet.

[0030] Embodiment 2

[0031] On the basis of embodiment 1, a specific implementation manner is further proposed.

[0032] In a feasible implementation manner, the axial flow fan 2 is sealingly connected to the first conveying pipe 4 through an air pipe, and an electromagnetic valve 3 is arranged on the air pipe, and the electromagnetic valve 3 is connected to the controller; under the action of the controller, the electromagnetic valve 3 corresponding to the working axial flow fan 2 is opened, and the remaining electromagnetic valves 3 are closed, so as to avoid the backflow of the hot air conveyed by the working axial flow fan 2 to the cabinet 1 from the non-working axial flow fan 2.

[0033] In a feasible implementation manner, the cooling box includes a box body 6, one end of the box body 6 has a medium inlet, and the other end of the box body 6 has a medium outlet; the box body 6 is filled with refrigerant liquid, and a semiconductor refrigeration sheet 7 is arranged on the wall of the box body 6, one end of the semiconductor refrigeration sheet 7 is located in the box body 6, and the other end of the semiconductor refrigeration sheet 7 is located outside the box body 6; the semiconductor refrigeration sheet 7 is connected to the controller; under the action of the controller, the controller controls one end of the semiconductor refrigeration sheet 7 located in the box body 6 to be a refrigeration end, and the other end of the semiconductor refrigeration sheet 7 located outside the box body 6 to be a heating end (the control of the refrigeration end and the heating end only needs to control the positive and negative directions of the input of the semiconductor refrigeration sheet 7), so as to realize the cooling of the refrigerant liquid in the box body 6; the refrigerant liquid exchanges heat with the hot air entering the cooling box, so that the hot air forms cold air, and the cold air is input into the cabinet 1, thereby realizing the cooling of the inside of the cabinet 1.

[0034] Further, the cooling box further comprises a cooling pipe 9 passing through the box body 6, the cooling pipe 9 is in sealing connection with the box body 6, the sealing connection can adopt any one of welding and sealing glue connection, one end of the cooling pipe 9 is a medium inlet of the cooling box, the other end is a medium outlet of the cooling box, the refrigerant liquid submerges the cooling pipe 9; the cooling pipe 9 comprises a plurality of pipe bodies, the plurality of pipe bodies are arranged in parallel with the same axis, both ends of all the pipe bodies are connected to the same head 8, the head 8 is in a wide-mouth shape, and the small-diameter end of the head 8 is connected with the first conveying pipe 4 or the second conveying pipe 10, and the large-diameter end of the head 8 is connected with all the pipe bodies through a pipe plate; the cross-sectional area of all the pipe bodies is greater than that of the first conveying pipe 4 or the second conveying pipe 10; gaps exist between the pipe bodies; the arrangement has at least the following advantages:

[0035] Firstly, the hot air is divided into multiple paths and flows in the box body 6, so that the airflow is finely divided, and the heat exchange area of the hot air and the cooling liquid is increased, so that the efficiency and stability of reducing the temperature of the hot air are ensured;

[0036] Secondly, under the unit flow, the cross-sectional area of all the pipe bodies is greater than that of the first conveying pipe 4, the flow area is increased, and the flow rate is reduced, so that the flow rate of the hot air flowing through the box body 6 can be effectively reduced, the heat exchange time of the hot air and the cooling liquid is increased, and the effectiveness of reducing the temperature of the hot air is ensured;

[0037] Thirdly, under the unit flow, the cross-sectional area of all the pipe bodies is greater than that of the second conveying pipe 10, the flow area is reduced, the flow rate of the cold air flowing out of the cooling box is increased, the cold air hole in the cabinet body 1 has a large flow rate, the injection range of the cold air is larger, the action volume and position are more, and the comprehensiveness of reducing the temperature in the cabinet body 1 is improved.

[0038] Embodiment 3

[0039] On the basis of any one of the embodiments 1-2, the sealing connection is a flange connection.

[0040] Embodiment 4

[0041] A kind of cabin main control cabinet, including cabinet body 1 and the cooling system of the cabin main control cabinet described, the axial flow fan 2 is located at the top of the cabinet body 1, the second conveying pipe 10 is connected to the bottom of the cabinet body 1, avoid hot air accumulation in the top of the cabinet body 1, cold air again cabinet body 1 bottom accumulation, effectively improve the comprehensiveness and reliability of reducing the temperature in the cabinet body 1.

[0042] The utility model discloses not limited to the foregoing specific embodiments. The utility model extends to any new feature or any new combination disclosed in this specification, as well as any new method or process step or any new combination disclosed.

Claims

1. A cooling system for a cabin main control cabinet, characterized in that: It includes at least two axial flow fans (2) installed on the cabinet (1), the outlets of multiple axial flow fans (2) are sealed to the input end of the first conveying pipe (4), the output end of the first conveying pipe (4) is sealed to the medium inlet of the cooling box, the cooling box can cool the medium entering the cooling box, and the medium outlet of the cooling box is sealed to the second conveying pipe (10) for sealing connection with the cabinet (1); a flow meter (5) is installed on the first conveying pipe (4) or / and the second conveying pipe (10), the flow meter (5) is connected to the controller, and the controller is connected to all axial flow fans (2).

2. The cooling system according to claim 1, characterized in that: The axial flow fan (2) and the first delivery pipe (4) are connected in a sealed manner through the air duct. Each air duct is equipped with a solenoid valve (3), which is connected to the controller.

3. The cooling system according to claim 1, characterized in that: The cooling box 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 also includes a cooling pipe (9) that passes 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, and the other end is the medium outlet of the cooling box. 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, 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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