Liquid cooling system and wind generating set

Abstract

The embodiment of the utility model provides a liquid cooling system and a wind generating set. The liquid cooling system comprises a first circulating flow channel, a second circulating flow channel and a base, the first circulating flow channel is provided with a first outlet and a first return port, the first outlet is used for being connected with a liquid cooling inlet of a to-be-cooled part, and the first return port is used for being connected with a liquid cooling outlet of the to-be-cooled part; a three-way valve, a heater connected with a first valve outlet of the three-way valve, a pump and a filter located at the inlet end of the pump are arranged on the first circulating flow channel; the base is used for mounting and positioning the liquid cooling system, the pump is mounted on the base, and at least one of the filter, the three-way valve and the heater is mounted on the base. The occupied space of the liquid cooling system can be effectively reduced, the internal space layout of the cabin cover is compact, and the liquid cooling system is convenient to operate, maintain and overhaul.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation, specifically to a liquid cooling system and a wind turbine generator set. Background Technology

[0002] With the rapid development of wind turbine generator sets, heat dissipation has become an important part of the unit's ability to generate electricity continuously. A well-designed cooling system can ensure that key components inside the unit operate within a suitable temperature range, thereby greatly improving the service life of components such as main bearings, generators, and gearboxes, and enhancing the reliability of the entire unit.

[0003] The cooling system of a wind turbine generator set is typically a liquid cooling system. A liquid cooling system includes components such as pumps, heaters, and radiators, all connected by piping. During operation, the pump delivers coolant to the radiator for heat dissipation, and then the coolant is sent to the components to be cooled. Alternatively, when the ambient temperature is very low, the pump can send the coolant to the heater to heat it before it is sent to the components, thus bringing them to their operating temperature range. Currently, liquid cooling systems are usually housed within the nacelle, with numerous components scattered throughout, occupying a significant amount of space. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a liquid cooling system and a wind turbine generator set, so as to at least solve the problem of the large space occupied by the liquid cooling system.

[0005] A first aspect of this utility model provides a liquid cooling system for a wind turbine generator set. The liquid cooling system includes: a first circulation channel having a first outlet and a first return port, the first outlet being connected to the liquid cooling inlet of a component to be cooled, and the first return port being connected to the liquid cooling outlet of the component to be cooled; a three-way valve, a heater connected to the first outlet of the three-way valve, a pump, and a filter located at the pump inlet are provided on the first circulation channel; a second circulation channel including an outlet pipe and a return pipe, the inlet of the outlet pipe being connected to the three-way valve, the outlet of the outlet pipe being connected to the inlet of a radiator, and the inlet of the return pipe being connected to the outlet of the radiator; when the pump outlet is close to the first outlet and the inlet of the three-way valve is close to the first return port, the outlet of the return pipe is connected to the inlet of the filter; when the heater outlet is close to the first outlet and the filter inlet is close to the first return port, the outlet of the return pipe is connected to the inlet of the component to be cooled; and a base for mounting and positioning the liquid cooling system, the pump being mounted on the base, and at least one of the filter, the three-way valve, and the heater being mounted on the base.

[0006] Furthermore, in some embodiments, the pump, three-way valve, heater, and filter are all integrated into the base.

[0007] Furthermore, in some embodiments, the three-way valve and the pump are spaced apart in a first horizontal direction, and the heater is located between the three-way valve and the pump in the first horizontal direction.

[0008] Furthermore, in some embodiments, the junction boxes of the filter and the pump are located on both sides of the pump body in a second horizontal direction, which is perpendicular to the first horizontal direction.

[0009] Furthermore, in some embodiments, the heater inlet and the first valve outlet of the three-way valve are distributed opposite each other in a first horizontal direction. The first circulation channel includes a first sub-channel that extends along the first horizontal direction and connects the first valve outlet of the three-way valve and the heater inlet.

[0010] Furthermore, in some embodiments, the outlet of the heater and the inlet of the filter are higher than the second valve outlet of the three-way valve; the first circulation channel also includes a second sub-channel, one end of which is connected to the outlet of the heater and the other end of which is connected to the inlet of the filter. The inlet of the liquid outlet pipe is connected to the second valve outlet of the three-way valve, and the liquid outlet pipe passes under the second sub-channel and extends out from the gap between the filter and the pump.

[0011] Furthermore, in some embodiments, the outlet of the heater faces a second horizontal direction toward the side where the filter is located, the second sub-channel extends from the outlet of the heater along the second horizontal direction and then bends to extend along the first horizontal direction and connects to the inlet of the filter; a portion of the outlet pipe extends along the first horizontal direction through the second sub-channel and extends out from the gap between the filter and the pump.

[0012] Furthermore, in some embodiments, the filter inlet is higher than the filter outlet; and / or the inlet on the filter connected to the second sub-channel is at the same height as the heater outlet, the second sub-channel extending in the horizontal plane.

[0013] Furthermore, in some embodiments, the filter outlet and the pump inlet are distributed relative to each other in the second horizontal direction; the first circulation channel also includes a third sub-channel, which extends along the second horizontal direction and connects the filter outlet and the pump inlet, with the outlet pipe passing over the third sub-channel from above.

[0014] Furthermore, in some embodiments, the outlet of the return pipe is connected to the inlet of the filter and extends along a first horizontal direction, the return pipe and the outlet pipe are spaced apart in a second horizontal direction, both the return pipe and the outlet pipe extend to the same side of the base, and the inlet of the return pipe is flush with the outlet of the outlet pipe.

[0015] Furthermore, in some embodiments, the outlet of the liquid outlet pipe and the inlet of the liquid return pipe are arranged facing upwards.

[0016] Furthermore, in some embodiments, the pump outlet is located on the side of the pump away from the filter, and the first circulation channel further includes a fourth sub-channel. One end of the fourth sub-channel forms a first outlet, and the other end of the fourth sub-channel is connected to the pump outlet. At least a portion of the fourth sub-channel extends vertically upward so that the first outlet faces upward, or at least a portion of the fourth sub-channel extends vertically downward so that the first outlet faces downward. The valve inlet of the three-way valve faces the same side of the base as the pump outlet. The first circulation channel further includes a fifth sub-channel. One end of the fifth sub-channel is connected to the valve inlet of the three-way valve, and the other end of the fifth sub-channel forms a first return port. At least a portion of the fifth sub-channel extends vertically downward so that the first return port faces downward, or at least a portion of the fifth sub-channel extends vertically upward so that the first return port faces upward. The fourth and fifth sub-channels are located on the same side of the base.

[0017] Furthermore, in some embodiments, the base is rectangular, with the first horizontal direction being the length direction of the base and the second horizontal direction being the width direction of the base.

[0018] Furthermore, in some embodiments, the first and second circulation channels are staggered in height.

[0019] Furthermore, in some embodiments, the first outlet and the first return port are located on the same side of the liquid cooling system.

[0020] Furthermore, in some embodiments, the first return port is positioned close to the component to be cooled.

[0021] Furthermore, in some embodiments, the outlet of the liquid outlet pipe and the inlet of the liquid return pipe are located on the same side of the liquid cooling system.

[0022] Furthermore, in some embodiments, the outlet of the liquid outlet pipe and the inlet of the liquid return pipe are aligned with the edge of the base.

[0023] Furthermore, in some embodiments, an exhaust valve is provided at the high point of the first circulation channel, and an injection / drainage port is provided at the low point of the first circulation channel.

[0024] Furthermore, in some embodiments, at least one of a temperature sensor, a pressure sensor, and a flow meter is also provided on the first circulation channel.

[0025] A second aspect of this utility model provides a wind turbine generator set, which includes a component to be cooled, a radiator, and a liquid cooling system as described in any of the above embodiments. A first outlet is connected to the liquid cooling inlet of the component to be cooled, a first return port is connected to the liquid cooling outlet of the component to be cooled, and the inlet of the return pipe is connected to the outlet of the radiator.

[0026] Furthermore, in some embodiments, the wind turbine generator set further includes: a nacelle cover, the component to be cooled and the liquid cooling system are both disposed inside the nacelle cover, and the radiator is disposed outside the nacelle cover; wherein, the first return port is disposed near the component to be cooled, at least a portion of the second circulation channel extends along the truss of the nacelle cover, and the outlet of the liquid outlet pipe and the inlet of the liquid return pipe are disposed near the truss of the nacelle cover.

[0027] Furthermore, in some embodiments, the wind turbine generator set also includes a protective barrier disposed between the component to be cooled and the liquid cooling system.

[0028] The liquid cooling system and wind turbine generator set with the liquid cooling system provided in this embodiment integrate at least one of the filter, three-way valve and heater together with the pump on the base, so that at least two components of the liquid cooling system are centrally located, which can effectively reduce the space occupied by the liquid cooling system and make the internal space layout of the nacelle more compact.

[0029] Other aspects and / or advantages of the present invention will be set forth in part in the description which follows, and in part will be clear from the description or may be learned by practice of the present invention. Attached Figure Description

[0030] The above and other objects and features of this utility model will become clearer from the following description of embodiments in conjunction with the accompanying drawings, in which:

[0031] Figure 1 A schematic diagram illustrating the working principle of a liquid cooling system according to an embodiment of this application is shown;

[0032] Figure 2 A schematic diagram illustrating the working principle of a liquid cooling system according to another embodiment of this application is shown;

[0033] Figure 3 A top view schematic diagram of a liquid cooling system according to an embodiment of this application is shown;

[0034] Figure 4 A front view schematic diagram of a liquid cooling system according to an embodiment of this application is shown;

[0035] Figure 5 A partial top view schematic diagram of a liquid cooling system according to an embodiment of this application is shown;

[0036] Figure 6 A side view schematic diagram of a liquid cooling system according to an embodiment of this application is shown;

[0037] Figure 7 Another top view schematic diagram of a liquid cooling system according to an embodiment of this application is shown;

[0038] Figure 8 This invention provides a partial top view of the interior of the nacelle of a wind turbine generator set according to an embodiment of the present application.

[0039] Figure 9 A partial front view of the interior of the nacelle of a wind turbine generator set according to an embodiment of this application is shown.

[0040] Figures 1 to 9 Explanation of icon numbers:

[0041] 100 First circulation channel; 110 First sub-channel; 120 Second sub-channel; 130 Third sub-channel; 140 Fourth sub-channel; 141 First outlet; 150 Fifth sub-channel; 151 First return port; 160 Sixth sub-channel; 170 Seventh sub-channel; 180 Eighth sub-channel; 200 Three-way valve; 210 First valve outlet; 220 Second valve outlet; 230 Valve inlet; 240 Round flange; 300 Heater; 400 Pump; 410 Junction box; 500 Filter; 600 Second circulation channel; 610 Discharge pipe; 620 Return pipe; 700 Radiator; 800 Base; 910 Components to be cooled; 920 Cabin cover; 921 Truss; 930 Passageway. Detailed Implementation

[0042] The following detailed embodiments are provided to aid the reader in gaining a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to those orders set forth herein, but may be changed as will become clear upon understanding this disclosure, except for operations that must occur in a specific order. Furthermore, for clarity and conciseness, descriptions of features known in the art may be omitted.

[0043] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein, which will become clear upon understanding the disclosure of this application.

[0044] As used herein, the term “and / or” includes any one of the associated listed items and any combination of any two or more.

[0045] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts should not be limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Thus, without departing from the teaching of the examples described herein, the first component, first assembly, first region, first layer, or first part referred to as the first component, first assembly, first region, first layer, or first part may also be referred to as the second component, second assembly, second region, second layer, or second part.

[0046] In the specification, when an element such as a layer, region, or substrate is described as being "on" another element, "connected to," or "bonded to" another element, the element may be directly "on" another element, directly "connected to," or "bonded to" the other element, or one or more other elements may be present in between. Conversely, when an element is described as being "directly on" another element, "directly connected to," or "directly bonded to" another element, no other elements may be present in between.

[0047] The terminology used herein is for the purpose of describing various examples only and is not intended to limit disclosure. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well. The terms “comprising,” “including,” and “having” indicate the presence of the described features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof. The term “a plurality” represents any quantity of two or more.

[0048] The directional terms “above,” “below,” “top,” and “bottom” used in this application, unless otherwise specified, are based on the orientation of the product when it is in normal use.

[0049] Unless otherwise defined, all terms used herein, including technical and scientific terms, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains after understanding the invention. Unless expressly defined herein, terms such as those defined in a general dictionary shall be interpreted as having a meaning consistent with their meaning in the context of the relevant field and in this invention, and shall not be interpreted in an idealized or overly formalistic manner.

[0050] The following will combine Figures 1 to 9 This invention introduces a liquid cooling system and a wind turbine generator set provided by embodiments of the present invention. Among them, Figure 3 , Figure 6 and Figure 7 The arrows in the text represent the direction of coolant flow, not the physical structure.

[0051] Example 1:

[0052] like Figure 1 and Figure 3 As shown, the liquid cooling system includes a first circulation channel 100, a second circulation channel 600, and a base 800.

[0053] The first circulation channel 100 is primarily an internal circulation channel for the liquid cooling system. The first circulation channel 100 has a first outlet 141 and a first return port 151. The first outlet 141 is connected to the liquid cooling inlet of the component 910 to be cooled, and the first return port 151 is connected to the liquid cooling outlet of the component 910 to be cooled. Figure 1 As shown, a three-way valve 200, a heater 300 connected to the first valve outlet 210 of the three-way valve 200, a filter 500 and a pump 400 are sequentially arranged along the flow direction of the coolant on the first circulation channel 100.

[0054] Among them, such as Figure 1 As shown, pump 400 is located near the first outlet 141 and is used to pump coolant into the component 910 to cool it.

[0055] like Figure 1 As shown, the valve inlet 230 of the three-way valve 200 is located close to the first return port 151, which can control the valve inlet 230 of the three-way valve 200 to be connected with the first valve outlet 210 of the three-way valve 200, thereby realizing the circulation of coolant in the first circulation channel 100.

[0056] The heater 300 can heat the coolant at low temperatures, thereby enabling the component 910 to reach its operating temperature range.

[0057] The filter 500 is located at the inlet end of the pump 400. It can filter impurities in the fluid to prevent them from entering the pump 400 and the coolable parts 910 with small gaps. It can protect the internal structure of the pump 400 and extend the service life of the pump 400.

[0058] The second circulation channel 600 is mainly the external circulation channel of the liquid cooling system, connected to the external heat sink 700. Specifically, as shown... Figure 1 As shown, the second circulation channel 600 includes an outlet pipe 610 and a return pipe 620. The inlet of the outlet pipe 610 is connected to the second valve outlet 220 of the three-way valve 200, and the outlet of the outlet pipe 610 is used to connect to the inlet of the radiator 700. The inlet of the return pipe 620 is used to connect to the outlet of the radiator 700, and the outlet of the return pipe 620 is connected to the inlet of the filter 500.

[0059] In this way, during the cooling process, the internal and external circulation of the liquid cooling system can be switched by controlling the three-way valve 200 to achieve coolant diversion. For example, by connecting the valve inlet 230 of the three-way valve 200 to the first valve outlet 210, the coolant flows through the heater 300 for heating. Alternatively, by connecting the valve inlet 230 of the three-way valve 200 to the second valve outlet 220, the coolant flows through the radiator 700 for heat dissipation. Whether the coolant flows through the heater 300 or the radiator 700, it then flows through the filter 500 into the pump 400, where it is pumped to the component 910 to be cooled. Pump 400 not only enables coolant circulation in the first circulation channel 100 and the component 910 to be cooled, but also enables coolant circulation in the second circulation channel 600 and the component 910 to be cooled. This eliminates the need for additional mechanical structures to transport or pressurize the liquid in the second circulation channel 600, reducing the number of components and lowering costs. Furthermore, by connecting the outlet of the heater 300 in the first circulation channel 100 and the outlet of the return pipe 620 in the second circulation channel 600 to the inlet of the filter 500, the coolant, whether flowing through the heater 300 or the radiator 700, is filtered by the filter 500 before entering the pump 400, reducing the likelihood of pump 400 clogging and damage.

[0060] The base 800 is used for mounting and positioning the liquid cooling system. The pump 400, filter 500, three-way valve 200, and heater 300 are also mounted on the base 800. All four components of the liquid cooling system are integrated onto the base 800. Compared to related technologies where the components of the liquid cooling system are dispersed within the engine compartment 920, this significantly reduces the space occupied by the liquid cooling system, allowing for a more compact internal layout within the engine compartment 920, thus reducing costs and increasing efficiency. Furthermore, instead of requiring a separate base for each component of the liquid cooling system, the shared base 800 reduces the number of parts, lowers system weight, reduces costs, and facilitates centralized installation of the liquid cooling system.

[0061] In practical applications, the four components mentioned above are integrated onto the base 800, and the entire system is connected to the wind turbine generator via the base 800, facilitating assembly. Support structures for the corresponding components can be installed on the base 800. Reinforcement is concentrated on the base 800, reducing system weight.

[0062] Furthermore, in related technologies, because the components of a liquid cooling system are distributed, liquid shut-off structures, such as butterfly valves, are typically installed on both sides of each component to facilitate maintenance and replacement. This allows the coolant to be drained by disconnecting the butterfly valves at both ends of the component before replacement. This results in a large number of butterfly valves on the piping of the liquid cooling system, increasing the number of components and raising costs. Moreover, space must be reserved within the engine compartment housing 920 for the installation of all butterfly valves. In this embodiment, the four components of the liquid cooling system are integrated onto the base 800. Liquid blocking structures can be directly installed on both sides of the integrated component assembly. For example, butterfly valves can be installed on the outlet side of the pump 400 and the valve inlet side of the three-way valve 200 on the first circulation channel 100, and butterfly valves can be installed on the outlet pipe 610 and return pipe 620 of the second circulation channel 600, for a total of four butterfly valves. When any component of the pump 400, filter 500, three-way valve 200, and heater 300 needs to be replaced, the four butterfly valves can be disconnected to drain the coolant from the four components, and then the component can be disassembled individually. This reduces the number of liquid blocking structures, reduces the number of parts, and saves costs. Moreover, it facilitates the operation and maintenance of the liquid cooling system. When a component integrated together needs to be replaced, only the coolant at the integration point needs to be drained, avoiding the need for multiple draining and refilling operations in a decentralized design.

[0063] It is worth noting that, Figure 1 The rectangular dashed line only represents that the filter 500, pump 400, three-way valve 200 and heater 300 are integrated together, and are not a solid structure.

[0064] Since the pump 400, filter 500, three-way valve 200, and heater 300 are all integrated on the base 800, although this facilitates centralized assembly, it presents certain challenges to the rational layout of the various components and pipelines of the liquid cooling system. Therefore, in this embodiment, the base 800 is rectangular, and the three-way valve 200 and pump 400 are positioned in the first horizontal direction (i.e., Figure 3 The heaters 300 are spaced apart along the length of the base 800, and are located between the three-way valve 200 and the pump 400 in the first horizontal direction. The compact structure helps to shorten the pipeline length between the three-way valve 200 and the heater 300, reducing the space occupied.

[0065] The junction boxes 410 of the filter 500 and the pump 400 are respectively located in the second horizontal direction of the main body of the pump 400 (i.e., Figure 3On both sides of the base 800 (in the width direction), the second horizontal direction is perpendicular to the first horizontal direction. On the one hand, it can shorten the pipeline length between the filter 500 and the pump 400, and facilitate the connection of the heater 300 and the filter 500 over a shorter distance. On the other hand, the junction box 410 of the pump 400 will not occupy the space in the length direction of the base 800, so that the base 800 is not too long and can be arranged in a suitable position within the nacelle cover 920.

[0066] like Figure 3 , Figure 4 and Figure 7 As shown, the inlet of heater 300 and the first valve outlet 210 of three-way valve 200 are distributed opposite each other in a first horizontal direction. The first circulation channel 100 includes a first sub-channel 110, which extends along the first horizontal direction and connects the first valve outlet 210 of three-way valve 200 and the inlet of heater 300. The first sub-channel 110 extends in a straight line and is relatively short, which can reduce the space occupied, save materials, save costs, and reduce the number of bends.

[0067] like Figure 3 and Figure 4 As shown, the outlet of heater 300 is higher than the second valve outlet 220 of three-way valve 200. The first circulation channel 100 also includes a second sub-channel 120, one end of which is connected to the outlet of heater 300. A portion of the second sub-channel 120 extends along a second horizontal direction and then bends to extend along a first horizontal direction, connecting to the inlet of filter 500. Because the outlet of heater 300 is higher, the second sub-channel 120 is also arranged at a higher height. Figure 3 As shown, the inlet of the outlet pipe 610 is connected to the second valve outlet of the three-way valve 200. A portion of the outlet pipe 610 extends along a first horizontal direction, passing under the second sub-flow channel 120 and extending out from the gap between the filter 500 and the pump 400. Here, the second sub-flow channel 120 and the outlet pipe 610 are staggered in height and spaced apart in the width direction of the base 800, preventing interference and reducing the space occupied by the piping, thus allowing for a compact arrangement of the liquid cooling system. Furthermore, by having both the second sub-flow channel 120 and the outlet pipe 610 extend to the same side along the length direction of the base 800, the space occupied by the flow channels above the base 800 is reduced.

[0068] Specifically, such as Figure 3As shown, the outlet of heater 300 can be oriented towards the second horizontal direction and close to the side where filter 500 is located, which can shorten the length of the second sub-flow channel 120 and reduce the space occupied by the second sub-flow channel 120. In addition, the second valve outlet 220 of three-way valve 200 can be oriented towards the second horizontal direction and close to the side where filter 500 is located, which can reduce the length of outlet pipe 610 and reduce the space occupied by outlet pipe 610.

[0069] In practical applications, the piping between filter 500 and pump 400 is connected via a flange. Therefore, after the outlet pipe 610 extends from the gap between filter 500 and pump 400, the minimum distance between the piping between filter 500 and pump 400 and the outlet pipe 610 is only the distance of a flange or connecting elbow, saving space. Additionally, the higher-positioned second sub-channel 120 can be fixed with pipe clamps to ensure the installation stability of the second sub-channel 120.

[0070] Figure 6 The arrows indicate the direction and approximate location of coolant entering and exiting filter 500. A vertically downward arrow indicates coolant enters filter 500 from above; an arrow curving to the lower left indicates coolant enters filter 500 laterally from the upper part; and the bottommost arrow pointing to the right indicates coolant exits filter 500 from the lower part. Figure 6 As shown, the inlet of filter 500 is higher than the outlet of filter 500. This facilitates raising the end of the second sub-channel 120 near filter 500 to connect with the inlet of filter 500 (see [reference]). Figure 6 This provides space for the lower outlet pipe 610 to pass through. On the other hand, the coolant enters from the top and exits from the bottom in the filter 500. Compared with the coolant entering from the bottom and exiting from the top in the filter 500, impurities are less likely to completely settle at the bottom of the filter 500, which helps to extend the service life of the filter 500.

[0071] Specifically, the inlet of the filter 500 connected to the second sub-channel 120 can be at the same height as the outlet of the heater 300, and the second sub-channel 120 extends in the horizontal plane. That is, the second sub-channel 120 extends laterally, occupies little space, and the pipeline layout is neat.

[0072] Figure 4 A front view schematic diagram of the liquid cooling system is shown. Figure 4 In this configuration, the filter 500 is located on the side of the pump 400 opposite to the pump junction box 410 and is partially obscured by the main body of the pump 400. The height of the filter 500 is lower than the height of the pump 400, but still relatively high. Figure 4As can be seen, the unobstructed portion of the second sub-channel 120 extends horizontally, and the outlet pipe 610 is located below the second sub-channel 120, continuing to extend after passing through the second sub-channel 120 from below. Figure 3 The position of the outlet pipe 610 shows that it further passes through the gap between the filter 500 and the pump 400. Combined with... Figure 4 The outlet pipe 610 continues to bend and extend upwards, achieving a staggered distribution of the outlet pipe 610 and the second sub-channel 120.

[0073] In specific applications, such as Figure 6 As shown, the filter 500 has a first inlet and a second inlet. The heights of both the first inlet and the second inlet are higher than the height of the outlet of the filter 500. The first inlet is higher than the second inlet. The first inlet is connected to the outlet of the return pipe 620, and the second inlet is connected to the outlet of the second sub-channel 120.

[0074] like Figure 3 As shown, the outlet of filter 500 and the inlet of pump 400 are distributed opposite each other in the second horizontal direction (i.e., the width direction of base 800). The first circulation channel 100 also includes a third sub-channel 130, which extends along the second horizontal direction and connects the outlet of filter 500 and the inlet of pump 400. The third sub-channel 130 extends in a straight line and has a short pipe, which can reduce the space occupied, save materials, and save costs. Moreover, the lower outlet of filter 500 facilitates the discharge pipe 610 to pass through the third sub-channel 130 from above, through the gap between filter 500 and pump 400 (combined with...). Figure 3 The fact that part of the third sub-channel 130 is blocked by the outlet pipe 610 indicates that the outlet pipe 610 is higher than the third sub-channel 130. The outlet pipe 610 is staggered in height with the second sub-channel 120 and the third sub-channel 130 and does not interfere with each other, which can greatly reduce the space occupied by the pipeline.

[0075] In practical applications, the outlet of filter 500 can be located at the bottom of the side wall of filter 500, the first inlet of filter 500 can be located at the top of filter 500, and the second inlet of filter 500 can be located at the top of the side wall of filter 500. Of course, the inlet and outlet positions of filter 500 can also be adjusted appropriately according to the pipeline layout, and are not limited to the above examples. Additionally, the higher-positioned outlet pipe 610 can be fixed with pipe clamps to ensure the installation stability of the outlet pipe 610.

[0076] like Figure 3As shown, the outlet of the return pipe 620 is connected to the inlet of the filter 500 and extends along a first horizontal direction. The return pipe 620 and the outlet pipe 610 are spaced apart in a second horizontal direction (i.e., the width direction of the base 800). Both the return pipe 620 and the outlet pipe 610 extend to the same side of the base 800, and the inlet of the return pipe 620 is flush with the outlet of the outlet pipe 610. The return pipe 620 and the outlet pipe 610 are parallel and aligned at their ends, resulting in a neat pipe arrangement and facilitating connection to the radiator 700.

[0077] like Figure 4 As shown, the outlet of the liquid outlet pipe 610 and the inlet of the liquid return pipe 620 are positioned upwards for easy connection to the radiator 700. Of course, the outlet of the liquid outlet pipe 610 and the inlet of the liquid return pipe 620 can also be positioned downwards, depending on the location of the radiator 700.

[0078] In addition, such as Figure 4 As shown, the outlet of the liquid outlet pipe 610 and the inlet of the liquid return pipe 620 are both located on the same side along the length of the base 800. This facilitates pipe connection and connection to the radiator 700, saving space. The outlet of the liquid outlet pipe 610 and the inlet of the liquid return pipe 620 can be connected to the pipeline via flanges.

[0079] In practical applications, the design of the liquid cooling system is based on its location within the engine compartment. The placement of the liquid cooling system within the engine compartment can be determined by the location of the component 910 to be cooled. For example, when the liquid cooling system is placed inside the engine compartment cover 920, with the component 910 to be cooled located to the left of the liquid cooling system, such as... Figure 8 and Figure 9 As shown, the outlet of the liquid outlet pipe 610 and the inlet of the liquid return pipe 620 can be positioned close to the truss 921 of the engine room cover 920, which facilitates connection with the external radiator 700, and vice versa. In addition, the pipeline path of the second circulation channel 600 is relatively long, requiring a place to fix the pipeline. At the same time, in order not to obstruct the passage of personnel or components, the second circulation channel 600 can be arranged along the direction of the truss 921 of the engine room cover 920, so that the inlet of the liquid return pipe 620 and the outlet of the liquid outlet pipe 610 are close to the side of the truss 921 of the engine room cover 920, which facilitates connection with the radiator 700. Figure 9 The dashed box surrounding the outlet of the liquid outlet pipe 610 and the inlet of the liquid return pipe 620 is only to delineate the part where the liquid cooling system connects to the radiator 700. This part is located near the truss 921 of the nacelle cover 920 and is not a solid structure.

[0080] like Figure 3As shown, the outlet of pump 400 is located on the side of pump 400 away from filter 500. The first circulation channel 100 also includes a fourth sub-channel 140, one end of which forms the first outlet 141, and the other end of the fourth sub-channel 140 is connected to the outlet of pump 400, as shown. Figure 4 As shown, at least a portion of the fourth sub-channel 140 extends vertically upward so that the first outlet 141 is oriented upward. Figure 3 As shown, the valve inlet 230 of the three-way valve 200 and the outlet of the pump 400 face the same side of the base 800. The first circulation channel 100 also includes a fifth sub-channel 150, one end of which is connected to the valve inlet 230 of the three-way valve 200, and the other end of which forms a first return port 151, as shown. Figure 4 and Figure 5 As shown, at least a portion of the fifth sub-channel 150 extends vertically downward so that the first return port 151 is positioned downward; wherein the fourth sub-channel 140 and the fifth sub-channel 150 are located on the same side of the base 800.

[0081] Here, the outlet of pump 400 and the valve inlet 230 of three-way valve 200 are both oriented towards the same side of the width direction of base 800, and the first outlet 141 and the first return port 151 are located on the same side of the width direction of base 800, which facilitates pipe connection, facilitates connection to the part 910 to be cooled, and saves space. The first outlet 141 and the first return port 151 can be connected to pipelines via flanges.

[0082] Of course, at least a portion of the fourth sub-channel 140 may also extend vertically downward so that the first outlet 141 is facing downward, and similarly, at least a portion of the fifth sub-channel 150 may also extend vertically upward so that the first return outlet 151 is facing upward.

[0083] In addition, such as Figure 3 As shown, the junction box 410 of the pump 400 is located on the side of the main body of the pump 400 away from the filter 500. This avoids the junction box 410 occupying space in the longitudinal direction of the base 800.

[0084] In practical applications, when the liquid cooling system is placed inside the nacelle housing 920, such as Figure 8 and Figure 9 As shown, the first return port 151 can be positioned close to the component 910 to be cooled, which facilitates the connection between the first return port 151 and the component 910. Moreover, since the first return port 151 and the first outlet 141 are located on one side of the width direction of the base 800, rather than in the length direction, the space occupied by the liquid cooling system in the length direction of the base 800 can be reduced, making the space occupied by the liquid cooling system in the length and width directions of the base 800 as small as possible, so that the liquid cooling system has a compact layout, which facilitates its installation inside the engine compartment cover 920. Figure 9The dashed box surrounding the fifth sub-channel 150 is only to show the location of the first return port 151 of the liquid cooling system. The first return port 151 is close to the cooling element 910 on the left side, and the two are easy to connect. It is not a solid structure.

[0085] like Figure 8 As shown, there is a passageway 930 between the component to be cooled 910 and the liquid cooling system. The passageway 930 allows maintenance personnel to pass through for easy inspection of the internal components of the engine compartment cover 920. However, since the three-way valve 200 is very close to the passageway 930, maintenance personnel are prone to bumping into the three-way valve 200 while passing through the passageway 930. Therefore, a protective railing (not shown in the figure) can be installed on one side of the passageway 930 between the component to be cooled 910 and the liquid cooling system to shield the three-way valve 200 and protect the maintenance personnel.

[0086] The following details the flow direction of the coolant in a liquid cooling system during operation. For ease of description, the following is used: Figure 7 The description is based on the direction of the arrow (up, down, left, right). When the liquid cooling system is in circulation, the valve inlet 230 of the three-way valve 200 is connected to the first valve outlet 210 of the three-way valve 200. The first return port 151 of the fifth sub-flow channel 150 is connected to the component 910 to be cooled. After the coolant flows out of the component 910, it flows upward along the fifth sub-flow channel 150 in the direction of the arrow in the figure, enters the three-way valve 200, and then flows horizontally to the right into the heater 300. After being heated by the heater 300, it flows along the second sub-flow channel 120 into the filter 500, and then flows downward along the third sub-flow channel 130 in the direction of the arrow in the figure into the pump 400. Finally, it enters the component 910 to be cooled through the first outlet 141, realizing the circulation of coolant through the component 910.

[0087] When operating outside the liquid cooling system, the valve inlet 230 of the three-way valve 200 is connected to the second valve outlet 220 of the three-way valve 200. After the coolant flows out from the component to be cooled 910, it flows upward along the fifth sub-channel 150 in the direction of the arrow in the figure, enters the three-way valve 200, and then continues upward into the outlet pipe 610. It then flows to the right along the outlet pipe 610 into the radiator 700. After the coolant flows out from the radiator 700, it enters the return pipe 620 and flows to the left in the direction of the arrow in the figure into the filter 500. Then it enters the third sub-channel 130 and flows downward in the direction of the arrow in the figure into the pump 400. Finally, it enters the component to be cooled 910 through the first outlet 141, realizing the circulation of coolant through the component to be cooled 910.

[0088] Example 2:

[0089] like Figure 2As shown, the liquid cooling system includes a first circulation channel 100, a second circulation channel 600, and a base 800. A filter 500, a pump 400, a three-way valve 200, and a heater 300 are sequentially arranged along the flow direction of the coolant in the first circulation channel 100. The first circulation channel 100 has a first outlet 141 and a first return port 151. The first outlet 141 is connected to the liquid cooling inlet of the component 910 to be cooled, and the first return port 151 is connected to the liquid cooling outlet of the component 910 to be cooled. The outlet of the heater 300 is located near the first outlet 141, and the inlet of the filter 500 is located near the first return port 151. The outlet of the pump 400 is connected to the valve inlet 230 of the three-way valve 200, and the first valve outlet 210 of the three-way valve 200 is connected to the inlet of the heater 300.

[0090] The second circulation channel 600 includes an outlet pipe 610 and a return pipe 620. The inlet of the outlet pipe 610 is connected to the second valve outlet 220 of the three-way valve 200, and the outlet of the outlet pipe 610 is used to connect to the inlet of the radiator 700. The inlet of the return pipe 620 is used to connect to the outlet of the radiator 700, and the outlet of the return pipe 620 is used to connect to the liquid cooling inlet of the component 910 to be cooled.

[0091] In this way, during the cooling process, the coolant can be heated by flowing through the heater 300 and then into the component 910 to be cooled by controlling the three-way valve 200, or the coolant can be cooled by flowing through the radiator 700 and then into the component 910 to be cooled. Regardless of which branch the coolant flows through, after flowing out of the component 910, the coolant first passes through the filter 500 before entering the pump 400, which can reduce the chance of the pump 400 becoming clogged and damaged. The pump 400 can not only realize the circulation of coolant in the first circulation channel 100 and the component 910 to be cooled, but also realize the circulation of coolant in the second circulation channel 600 and the component 910 to be cooled. There is no need to configure additional mechanical structures for conveying or pressurizing liquid in the second circulation channel 600, which can reduce the number of parts and reduce costs.

[0092] The base 800 is used for mounting and positioning the liquid cooling system. The pump 400 is mounted on the base 800, and the filter 500, three-way valve 200, and heater 300 are also mounted on the base. All four components of the liquid cooling system are integrated onto the base 800. Compared to related technologies where the various parts of a water cooling system are dispersed within the engine compartment 920, this significantly reduces the space occupied by the liquid cooling system, allowing for a more compact internal layout within the engine compartment 920. Furthermore, instead of equipping each component of the liquid cooling system with its own dedicated support structure, the shared base 800 reduces the number of parts, lowers costs, and facilitates centralized installation of the liquid cooling system.

[0093] In addition, since the pump 400, filter 500, three-way valve 200 and heater 300 are all integrated on the base 800, it also has the technical effects of reducing the number of liquid blocking structures, reducing parts, saving costs, and facilitating the operation and maintenance of the liquid cooling system, as described in Embodiment 1 above. These will not be elaborated further here.

[0094] It is worth noting that, Figure 2 The rectangular dashed line only represents that the filter 500, pump 400, three-way valve 200 and heater 300 are integrated together, and are not a solid structure.

[0095] For the arrangement of components and piping in the liquid cooling system of Embodiment 2, the arrangement positions in Embodiment 1 can be referred to. In the first horizontal direction, the heater 300 is still located between the three-way valve 200 and the pump 400, and the filter 500 and the junction box 410 of the pump 400 are still located on both sides of the main body of the pump 400 in the second horizontal direction. In this case, as Figure 2 As shown, the first circulation channel 100 may include a first sub-channel 110, a third sub-channel 130, a sixth sub-channel 160, a seventh sub-channel 170, and an eighth sub-channel 180.

[0096] like Figure 2 As shown, the first sub-channel 110 is still connected to the three-way valve 200 and the heater 300, for reference. Figure 3 The first sub-channel 110 extends along a first horizontal direction. The inlet of the sixth sub-channel 160 is connected to the outlet of the heater 300, and the outlet of the sixth sub-channel 160 is used to connect to the liquid cooling inlet of the component 910 to be cooled. The sixth sub-channel 160 can be referenced. Figure 3 The second sub-channel 120 extends first along the second horizontal direction, then bends and extends along the first horizontal direction, and one end of the sixth sub-channel 160 forms the first outlet 141. For example... Figure 2 As shown, the eighth sub-flow channel 180 connects the outlet of the pump 400 and the valve inlet 230 of the three-way valve 200. The eighth sub-flow channel 180 can be located in... Figure 3 On one side of the base 800 in the width direction, it extends along the first horizontal direction and connects the outlet of pump 400 and the valve inlet 230 of three-way valve 200. The filter 500 and pump 400 are still connected by a third sub-flow channel 130, which extends along... Figure 3 Extending in the second horizontal direction, the aforementioned sixth sub-channel 160 can pass above the third sub-channel 130, through the gap between the filter 500 and the pump 400. For example... Figure 2 As shown, the outlet of the seventh sub-channel 170 is connected to the inlet of the filter 500, and the inlet of the seventh sub-channel 170 is used to connect to the liquid cooling outlet of the component 910 to be cooled. The seventh sub-channel 170 can be referenced... Figure 3The return pipe 620 extends along a first horizontal direction, and the inlet of the seventh sub-channel 170 forms a first return port 151. Thus, the positions of the first outlet 141 and the first return port 151 in this embodiment can be... Figure 3 The outlet of the liquid outlet pipe 610 and the inlet of the liquid return pipe 620 are located on the same side of the base 800 and are aligned, which facilitates the connection of the part to be cooled 910.

[0097] like Figure 2 As shown, the second circulation channel 600 includes an outlet pipe 610 and a return pipe 620. The inlet of the outlet pipe 610 is connected to the second valve outlet 220 of the three-way valve 200, and the outlet of the outlet pipe 610 is used to connect to the inlet of the radiator 700. The inlet of the return pipe 620 is used to connect to the outlet of the radiator 700, and the outlet of the return pipe 620 is used to connect to the liquid cooling inlet of the component 910 to be cooled. The outlet pipe 610 can be configured as follows: Figure 3 The second valve outlet 220 of the three-way valve 200 extends along the second horizontal direction, reaching one side of the base 800 in the width direction. The return pipe 620 can be arranged according to the position of the component to be cooled 910 and the radiator 700.

[0098] The first circulation channel 100 and the second circulation channel 600 are staggered in height and arranged in a compact manner with the components, which can reduce the space occupied by the liquid cooling system.

[0099] Of course, the positions of the filter 500, pump 400, three-way valve 200, and heater 300 are not limited to the above examples. For example, the positions of heater 300 and three-way valve 200 can be interchanged, so that three-way valve 200 is not only close to heater 300 on one side but also close to pump 400 on the other side, which facilitates shortening the pipeline length between pump 400, three-way valve 200, and heater 300. The arrangement of each sub-channel in the first circulation channel 100 and the second circulation channel 600 is also not limited to the above examples. As long as they are staggered in height and the space occupied is minimized, it meets the technical concept of this application.

[0100] Example 3:

[0101] Compared with Embodiment 1 or Embodiment 2 described above, there may be at least one of the following differences.

[0102] Firstly, the pump 400 is mounted on the base 800, and one or two of the filter 500, three-way valve 200, and heater 300 are also mounted on the base 800, but not all of them are integrated on the base 800. In this case, the positions of each component can still be the same as in Embodiment 1 and Embodiment 2, and the pipeline positions can also be the same.

[0103] Secondly, the base 800 does not have to be rectangular; it can also be elliptical or other shapes. The first horizontal direction and the second horizontal direction do not necessarily have to be the length and width directions of the base 800. The first horizontal direction and the second horizontal direction can be determined according to the position of the component 910 to be cooled in the nacelle cover 920. For example, the extension direction of a straight line perpendicular to the component 910 to be cooled can be defined as the first horizontal direction.

[0104] Third, the positions of the three-way valve 200, heater 300, filter 500, and pump 400 can differ from those in Embodiment 1. For example, the three-way valve 200 can be positioned between the heater 300 and the pump 400, or these four components can be arranged at four corners. Similarly, the arrangement of the first circulation channel 100 and the second circulation channel 600 can also differ from those in Embodiment 1. They can be adaptively adjusted according to the changes in the positions of the three-way valve 200, heater 300, filter 500, and pump 400, while ensuring at least one of the following three requirements.

[0105] 1) Ensure that the first circulation channel 100 and the second circulation channel 600 are staggered in height to reduce the space occupied.

[0106] 2) Ensure that the first outlet 141 and the first return outlet 151 are located on the same side of the liquid cooling system, and that the outlet of the liquid outlet pipe 610 and the inlet of the liquid return pipe 620 are located on the same side of the liquid cooling system, so as to facilitate the connection of the component to be cooled 910 and the radiator 700.

[0107] 3) Ensure that the first return port 151 is close to the part to be cooled 910, and arrange the pipeline as close as possible to the truss 921 of the engine cover 920 to facilitate pipeline fixing and not obstruct passage.

[0108] Fourth, the sub-channels do not necessarily extend only along the first and second horizontal directions, nor are they arranged horizontally and vertically. They can also extend at an angle or in a curved manner relative to the first and second horizontal directions. As long as the first circulation channel 100 and the second circulation channel 600 are staggered in height, it is acceptable. For example, the outlet pipe 610 can be located below the second sub-channel 120, and the third sub-channel 130 can be located below the outlet pipe 610.

[0109] Fifth, the heater 300 and the filter 500 can be integrated together, specifically, the heater 300 can be installed inside the filter 500, resulting in a compact structure. Of course, apart from the change in spatial position, the heater 300 and the filter 500 do not affect each other's functions.

[0110] Furthermore, in some embodiments, an exhaust valve is provided at the high point of the first circulation channel 100, and an injection / drainage port is provided at the low point of the first circulation channel 100.

[0111] Specifically, a combination of manual and automatic venting valves can be installed at the top of the liquid cooling system to achieve system venting during commissioning and operation. Injection and drainage ports can be installed at the bottom of the liquid cooling system for convenient injection and drainage of the cooling system.

[0112] As an example, an integrated structure of manual and automatic vent valves is installed at the high point of pump 400 to facilitate venting during commissioning and operation. The injection / drainage ports are located on the component at the inlet of pump 400 for easy injection and drainage.

[0113] Furthermore, in some embodiments, at least one of a temperature sensor, a pressure sensor, and a flow meter is also provided on the first circulation channel 100.

[0114] In practical applications, temperature and pressure sensors can be added to the pipelines near the first outlet 141 and the first return port 151 on the first circulation channel 100 to monitor the inlet and outlet temperatures and pressures. If necessary, pressure gauges or pressure testing connectors can be added as controls. Alternatively, a flow meter can be used to replace the pressure sensor to monitor the system operation.

[0115] Furthermore, in some embodiments, such as Figure 5 As shown, the three-way valve 200 has three valve ports and can be controlled electrically or manually, allowing for flow path switching as needed. The three valve ports of the three-way valve 200 can be connected to pipelines using round flanges 240.

[0116] like Figure 6 As shown, the filter 500 is designed with a filter element and a pipeline. One end of the filter element is connected to the inlet of the pump 400, which is called the pump inlet. The other end is connected to the return pipe 620 of the external circulation or the liquid cooling outlet of the component to be cooled 910. This ensures that the coolant will be filtered by the filter element no matter which loop it flows to the pump 400.

[0117] The filter element can be designed with axial inlet and circumferential outlet. It can also be designed with a bottom and a handle at the top for easy lifting of the filter element and the filtered material inside, facilitating filter replacement or cleaning.

[0118] Heater 300 is mainly used for heating the coolant in internal circulation systems. The two ends of heater 300 can be connected to pipelines via flanges.

[0119] Pump 400 adopts a bottom-in, top-out flow direction, therefore the outlet of filter 500 must be placed at a lower position. Pump 400 and filter 500 are connected by a flange. Pump 400 is equipped with a combination of manual and automatic air vent valves on its top for easy commissioning and air venting during operation.

[0120] The liquid cooling system provided by this utility model integrates multiple components and a cross-distribution of circulation channels. The first circulation channel 100 and the second circulation channel 600 are arranged in a staggered manner to avoid interference and minimize the occupied volume. In addition, pipe clamps can be used to fix the higher pipes in the flow channels to ensure the installation stability of the pipes.

[0121] This utility model embodiment also provides a wind turbine generator set, which includes a component to be cooled 910, a radiator 700, and a liquid cooling system as described in any of the above embodiments. A first outlet 141 is connected to the liquid cooling inlet of the component to be cooled 910, a first return port 151 is connected to the liquid cooling outlet of the component to be cooled 910, and the inlet of the return pipe 620 is connected to the outlet of the radiator 700.

[0122] The wind turbine generator set provided in this embodiment has the liquid cooling system of any of the above embodiments, and thus has the beneficial effects of any of the above embodiments, which will not be described in detail here.

[0123] While the embodiments of the present invention have been described in detail above, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope thereof. It should be understood that, to those skilled in the art, these modifications and variations will still fall within the spirit and scope of the embodiments of the present invention as defined in the claims.

Claims

1. A liquid cooling system for wind turbine generator sets, characterized in that, The liquid cooling system includes: A first circulation channel (100) has a first outlet (141) and a first return port (151). The first outlet (141) is used to connect to the liquid cooling inlet of the part to be cooled (910), and the first return port (151) is used to connect to the liquid cooling outlet of the part to be cooled (910). A three-way valve (200), a heater (300) connected to the first valve outlet (210) of the three-way valve (200), a pump (400), and a filter (500) located at the inlet end of the pump (400) are provided on the first circulation channel (100). The second circulation channel (600) includes an outlet pipe (610) and a return pipe (620). The inlet of the outlet pipe (610) is connected to the three-way valve (200), and the outlet of the outlet pipe (610) is used to connect to the inlet of the radiator (700). The inlet of the return pipe (620) is used to connect to the outlet of the radiator (700). When the outlet of the pump (400) is close to the first outlet (141) and the inlet of the three-way valve (200) is close to the first return port (151), the outlet of the return pipe (620) is connected to the inlet of the filter (500). When the outlet of the heater (300) is close to the first outlet (141) and the inlet of the filter (500) is close to the first return port (151), the outlet of the return pipe (620) is used to connect to the inlet of the component to be cooled (910). A base (800) is used for mounting and positioning the liquid cooling system, the pump (400) is mounted on the base (800), and at least one of the filter (500), the three-way valve (200), and the heater (300) is mounted on the base (800).

2. The liquid cooling system according to claim 1, characterized in that, The pump (400), the three-way valve (200), the heater (300), and the filter (500) are all integrated on the base (800).

3. The liquid cooling system according to claim 1 or 2, characterized in that, The three-way valve (200) and the pump (400) are spaced apart in a first horizontal direction, and the heater (300) is located between the three-way valve (200) and the pump (400) in the first horizontal direction.

4. The liquid cooling system according to claim 3, characterized in that, The junction box (410) of the filter (500) and the pump (400) are respectively located on both sides of the main body of the pump (400) in a second horizontal direction, which is perpendicular to the first horizontal direction.

5. The liquid cooling system according to claim 4, characterized in that, The inlet of the heater (300) and the first valve outlet (210) of the three-way valve (200) are distributed relative to each other in the first horizontal direction; The first circulation channel (100) includes a first sub-channel (110) which extends along a first horizontal direction and connects the first valve outlet (210) of the three-way valve (200) and the inlet of the heater (300).

6. The liquid cooling system according to claim 5, characterized in that, The outlet of the heater (300) and the inlet of the filter (500) are higher than the second valve outlet (220) of the three-way valve (200). The first circulation channel (100) further includes a second sub-channel (120), one end of which is connected to the outlet of the heater (300), and the other end of which is connected to the inlet of the filter (500). The inlet of the outlet pipe (610) is connected to the second valve outlet (220) of the three-way valve (200). The outlet pipe (610) passes under the second sub-channel (120) and extends out from the gap between the filter (500) and the pump (400).

7. The liquid cooling system according to claim 6, characterized in that, The outlet of the heater (300) faces the second horizontal direction and is close to the side where the filter (500) is located. The second sub-channel (120) extends from the outlet of the heater (300) along the second horizontal direction and then bends to extend along the first horizontal direction and connects to the inlet of the filter (500). A portion of the outlet pipe (610) extends along a first horizontal direction through the second sub-channel (120) and protrudes from the gap between the filter (500) and the pump (400).

8. The liquid cooling system according to claim 6, characterized in that, The inlet of the filter (500) is higher than the outlet of the filter (500); and / or the inlet of the filter (500) connected to the second sub-channel (120) is at the same height as the outlet of the heater (300), the second sub-channel (120) extending in the horizontal plane.

9. The liquid cooling system according to claim 6, characterized in that, The outlet of the filter (500) and the inlet of the pump (400) are distributed relative to each other in the second horizontal direction; The first circulation channel (100) further includes a third sub-channel (130) which extends along a second horizontal direction and connects the outlet of the filter (500) and the inlet of the pump (400). The outlet pipe (610) passes over the third sub-channel (130) from above.

10. The liquid cooling system according to claim 4, characterized in that, The outlet of the return pipe (620) is connected to the inlet of the filter (500) and extends along a first horizontal direction. The return pipe (620) and the outlet pipe (610) are spaced apart in a second horizontal direction. Both the return pipe (620) and the outlet pipe (610) extend toward the same side of the base (800), and the inlet of the return pipe (620) is flush with the outlet of the return pipe (620). and / or The outlet of the liquid outlet pipe (610) and the inlet of the liquid return pipe (620) are arranged facing upwards.

11. The liquid cooling system according to claim 4, characterized in that, The outlet of the pump (400) is located on the side of the pump (400) away from the filter (500). The first circulation channel (100) further includes a fourth sub-channel (140). One end of the fourth sub-channel (140) forms the first outlet (141), and the other end of the fourth sub-channel (140) is connected to the outlet of the pump (400). At least a portion of the fourth sub-channel (140) extends vertically upward so that the first outlet (141) is facing upward, or at least a portion of the fourth sub-channel (140) extends vertically downward so that the first outlet (141) is facing downward. The valve inlet (230) of the three-way valve (200) and the outlet of the pump (400) face the same side of the base (800). The first circulation channel (100) also includes a fifth sub-channel (150). One end of the fifth sub-channel (150) is connected to the valve inlet (230) of the three-way valve (200). The other end of the fifth sub-channel (150) forms the first return port (151). At least a portion of the fifth sub-channel (150) extends vertically downward so that the first return port (151) is set downward, or at least a portion of the fifth sub-channel (150) extends vertically upward so that the first return port (151) is set upward. The fourth sub-channel (140) and the fifth sub-channel (150) are located on the same side of the base (800).

12. The liquid cooling system according to claim 4, characterized in that, The base (800) is rectangular, the first horizontal direction is the length direction of the base (800), and the second horizontal direction is the width direction of the base (800).

13. The liquid cooling system according to claim 1 or 2, characterized in that, The first circulation channel (100) and the second circulation channel (600) are staggered in height; and / or The first outlet (141) and the first return port (151) are located on the same side of the liquid cooling system; and / or The first return port (151) is located close to the part to be cooled (910); and / or The outlet of the liquid outlet pipe (610) and the inlet of the liquid return pipe (620) are located on the same side of the liquid cooling system; and / or The outlet of the liquid outlet pipe (610) and the inlet of the liquid return pipe (620) are aligned with the edge of the base (800).

14. The liquid cooling system according to claim 1 or 2, characterized in that, An exhaust valve is provided at the high point of the first circulation channel (100), and an injection / drainage port is provided at the low point of the first circulation channel (100); and / or The first circulation channel (100) is also provided with at least one of a temperature sensor, a pressure sensor and a flow meter.

15. A wind turbine generator set, characterized in that, The wind turbine generator set includes a component to be cooled (910), a radiator (700), and a liquid cooling system as described in any one of claims 1 to 9. The first outlet (141) is connected to the liquid cooling inlet of the component to be cooled (910), the first return port (151) is connected to the liquid cooling outlet of the component to be cooled (910), and the inlet of the return pipe (620) is connected to the outlet of the radiator (700).

16. The wind turbine generator set according to claim 15, characterized in that, The wind turbine generator set also includes: The nacelle cover (920) is provided inside the nacelle cover (920), the component to be cooled (910) and the liquid cooling system are both provided inside the nacelle cover (920), and the radiator (700) is provided outside the nacelle cover (920); The first return port (151) is located near the part to be cooled (910), at least a portion of the second circulation channel (600) extends along the truss (921) of the nacelle cover (920), and the outlet of the liquid outlet pipe (610) and the inlet of the liquid return pipe (620) are located near the truss (921) of the nacelle cover (920).

17. The wind turbine generator set according to claim 16, characterized in that, The wind turbine generator set also includes: A protective barrier is provided between the part to be cooled (910) and the liquid cooling system.

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