Liquid cooling heat exchange structure and liquid cooling converter

Abstract

The invention discloses a liquid cooling heat exchange structure and a liquid cooling converter, and the heat exchange structure comprises a first liquid cooling part which is used for being in butt joint with a cold source to circulate a cooling medium inside, and the first liquid cooling part comprises at least one second liquid cooling part which is arranged on the first liquid cooling part and is communicated with a liquid cooling pipeline of the first liquid cooling part to circulate the cooling medium inside; wherein one second liquid cooling part is an exhaust liquid cooling part, and the highest position of the liquid cooling pipeline in the exhaust liquid cooling part is higher than the highest position of the liquid cooling pipeline of the first liquid cooling part and the highest position of the liquid cooling pipeline of any other second liquid cooling part. The liquid inlet end of the exhaust liquid cooling part is close to the liquid inlet end of the first liquid cooling part, and the liquid outlet end of the exhaust liquid cooling part is close to the liquid outlet end of the first liquid cooling part. By adopting the scheme, the residual gas in the liquid cooling pipeline can be effectively exhausted on the basis of not increasing exhaust components.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid cooling converter heat exchange, in particular to a liquid cooling heat exchange structure and a liquid cooling converter. BACKGROUND

[0002] In electrical equipment, such as energy storage converter modules, liquid cooling heat dissipation can efficiently take away the heat generated by electronic devices in the equipment, so that the entire electrical system maintains a good and stable working state. This liquid cooling heat dissipation method needs to circulate the cooling liquid through an external cooling source system, and at the same time, liquid cooling plates and other components are arranged in the electrical equipment to achieve heat dissipation of electronic devices. However, when the conventional liquid cooling heat dissipation system dissipates heat through the liquid cooling plate, it can only dissipate heat for the electronic devices that are in close contact with the liquid cooling plate, and the heat generated by the electronic devices will spread to the entire internal space of the electrical equipment shell, so the overall heat dissipation effect of the electrical equipment is not very ideal. Therefore, the prior art also adds a fan and an air-liquid heat exchanger to form an air-liquid heat exchange assembly in the electrical equipment, the air-liquid heat exchanger is also provided with a liquid cooling pipeline to circulate the cooling liquid, and the air-liquid heat exchanger is provided with heat exchange fins or a hollow heat exchange part, and the fan sends air to the heat exchange part of the air-liquid heat exchanger, so as to convert hot air into cold air and form a circulation in the shell of the electrical equipment.

[0003] However, when the liquid cooling pipeline of the liquid cooling plate and the air-liquid heat exchanger in the electrical equipment is just injected with cooling liquid or not used for a long time, the gas in the liquid cooling pipeline will affect the heat dissipation performance and operation stability of the liquid cooling system. The prior art usually relies on the circulating power of the cooling source system to carry and discharge the gas in the pipeline. However, only relying on the power of the cooling source system, when applied to a liquid cooling plate and other components with a large area, it is often difficult to completely discharge the gas from the liquid cooling pipeline. Especially when the installation position of the electrical equipment is physically higher than the cooling source system, it is more difficult to effectively remove the residual gas in the pipeline only by relying on the pressure and flow of the remote cooling source system. The prior art usually sets an exhaust valve or similar component to exhaust gas, but setting an exhaust valve will result in a complex structure and reduced reliability. SUMMARY

[0004] The purpose of the present application is to overcome the above-mentioned defects or problems in the background art, and to provide a liquid cooling heat exchange structure and a liquid cooling converter which can effectively discharge residual gas in the liquid cooling pipeline without increasing exhaust components.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] Technical solution one: a liquid cooling heat exchange structure, comprising a first liquid cooling component for connecting a cold source to circulate cooling medium inside, comprising: at least one second liquid cooling component arranged in the first liquid cooling component and communicating with the liquid cooling pipeline of the first liquid cooling component to circulate cooling medium inside; wherein one of the second liquid cooling components is an exhaust liquid cooling component, the highest part of the liquid cooling pipeline in the exhaust liquid cooling component is higher than the highest part of the liquid cooling pipeline of the first liquid cooling component and the highest part of the liquid cooling pipeline of any other second liquid cooling component, and the liquid inlet end of the exhaust liquid cooling component is arranged close to the liquid inlet end of the first liquid cooling component, and the liquid outlet end of the exhaust liquid cooling component is arranged close to the liquid outlet end of the first liquid cooling component.

[0007] Technical solution two based on technical solution one: the lowest part of the liquid cooling pipeline of at least the second liquid cooling component as the exhaust liquid cooling component is flush with the highest part of the liquid cooling pipeline of the first liquid cooling component.

[0008] Technical solution three based on technical solution two: further comprising at least one fan, each second liquid cooling component is provided with a heat exchange part corresponding to at least one fan, and the fan is used to drive air through the heat exchange part; the liquid cooling pipeline in the second liquid cooling component is formed with a plurality of heat exchange flow channels for cooling medium to flow through corresponding to the heat exchange part.

[0009] Technical solution four based on technical solution three: each heat exchange flow channel is arranged in parallel; the liquid cooling pipeline in the second liquid cooling component is formed with a liquid inlet collection part and a liquid outlet collection part corresponding to the two ends of the heat exchange flow channel respectively; the liquid inlet collection part communicates with the liquid inlet end of the second liquid cooling component, and the liquid outlet collection part communicates with the liquid outlet end of the second liquid cooling component.

[0010] Technical solution five based on technical solution four: in at least part of the liquid cooling pipeline of the second liquid cooling component, the liquid outlet collection part comprises at least two first liquid collection pipes communicated by a first liquid passage, and one of the first liquid collection pipes is provided with the liquid outlet end of the liquid outlet collection part; the liquid inlet collection part communicates the first liquid collection pipe without the liquid outlet end of the liquid outlet collection part in the liquid outlet collection part through at least part of the heat exchange flow channel; the first liquid passage is higher than the liquid outlet end of the liquid outlet collection part and not lower than the highest heat exchange flow channel.

[0011] Technical solution six based on technical solution five: the liquid inlet collection part comprises at least two second liquid collection pipes communicated by a second liquid passage, and one of the second liquid collection pipes is provided with the liquid inlet end of the liquid inlet collection part; the second liquid collection pipe provided with the liquid inlet end of the liquid inlet collection part in the liquid inlet collection part communicates the first liquid collection pipe without the liquid outlet end of the liquid outlet collection part in the liquid outlet collection part through the heat exchange flow channel; the second liquid passage is higher than the liquid inlet end of the liquid inlet collection part and not lower than the highest heat exchange flow channel.

[0012] Based on the technical solution six, the seventh technical solution is that the position of the liquid inlet end of the liquid inlet collecting part is lower than the liquid outlet end of the liquid outlet collecting part in at least part of the liquid cooling pipeline of the second liquid cooling part.

[0013] Based on the seventh technical solution, the eighth technical solution is that the liquid outlet end of the liquid outlet collecting part is not lower than the highest heat exchange flow channel.

[0014] Based on the eighth technical solution, the ninth technical solution is that the middle position of each heat exchange flow channel along the cooling medium flow direction is provided with a top liquid collecting part which is in communication with each heat exchange flow channel in at least part of the liquid cooling pipeline of the second liquid cooling part, and the liquid inlet end and the liquid outlet end of each heat exchange flow channel are lower than the top liquid collecting part.

[0015] In addition, the tenth technical solution is provided, which is a liquid cooling current transformer comprising a plurality of electronic devices, and further comprising the liquid cooling heat exchange structure according to any one of the first to ninth technical solutions, and at least part of the electronic devices are heat exchanged by the first liquid cooling part and the second liquid cooling part.

[0016] From the above description of the present application, the present application has the following beneficial effects compared with the prior art:

[0017] The first technical solution provides a liquid cooling heat exchange structure, which comprises a first liquid cooling part and at least one second liquid cooling part, the second liquid cooling part is arranged in the first liquid cooling part and is in communication with the liquid cooling pipeline of the first liquid cooling part, one second liquid cooling part is used as an exhaust liquid cooling part, and the highest position of the liquid cooling pipeline of the exhaust liquid cooling part is higher than the highest position of the liquid cooling pipeline of the first liquid cooling part and the highest position of the liquid cooling pipeline of any other second liquid cooling part. Based on the physical property that the gas density in the fluid is lower than the liquid density, the gas will naturally gather to the highest position of the entire heat exchange structure under the action of gravity. Therefore, the exhaust liquid cooling part becomes the natural gathering point of the residual gas in the entire liquid cooling system. At the same time, the liquid inlet end of the exhaust liquid cooling part is arranged close to the liquid inlet end of the first liquid cooling part, and the liquid outlet end is also arranged close to the liquid outlet end of the first liquid cooling part. Since the liquid inlet end and the liquid outlet end of the first liquid cooling part are directly connected to the cold source, the pressure difference between them is the largest, and the position of the liquid inlet end and the liquid outlet end of the exhaust liquid cooling part is arranged so that they also have a large pressure difference. Under the circulating power provided by the cold source, the pressure difference provides sufficient driving force for the cooling medium flowing through the exhaust liquid cooling part, which can overcome the gas resistance formed by the gathered gas, forcibly push the cooling medium to flow through the exhaust liquid cooling part, and carry the gas gathered therein to the main flow path for discharge. In summary, the heat exchange structure creatively couples the high-point gas collection and large-pressure-difference driving two technical means together to form a complete and automatically operated exhaust scheme, which improves the technical problem that the gas in the liquid cooling pipeline is difficult to exhaust in the prior art, and does not need to add additional exhaust valves and other components, simplifies the structure and improves the long-term operation reliability of the system.

[0018] In the second technical solution, the lowest part of the liquid cooling pipeline of the exhaust liquid cooling component is arranged to be flush with the highest part of the liquid cooling pipeline of the first liquid cooling component, so that the second liquid cooling component as the exhaust liquid cooling component is entirely above the first liquid cooling component in the vertical direction, the gas in the first liquid cooling component is quickly gathered to the exhaust liquid cooling component, the gas gathering effect is more certain and concentrated, and the exhaust efficiency and thoroughness are improved.

[0019] In the third technical solution, the fan is additionally arranged, the second liquid cooling component is provided with the heat exchange part for air flow and the heat exchange flow channel for cooling medium flow, and the air-liquid heat exchange function is given to the second liquid cooling component. This makes the heat exchange structure not only be capable of conducting heat dissipation of the electronic device in direct contact with the first liquid cooling component, but also be capable of actively cooling the air in the equipment shell through the second liquid cooling component, conducting convective heat dissipation of the device which cannot be in direct contact with the first liquid cooling component and the whole internal environment, and realizing more comprehensive and balanced temperature control of the liquid cooling current transformer.

[0020] In the fourth technical solution, the internal heat exchange flow channel of the second liquid cooling component is designed to be arranged in parallel, and the liquid inlet collecting part and the liquid outlet collecting part are arranged. The parallel structure can provide a larger heat exchange contact area for the cooling medium under the premise of ensuring the total flow, effectively reduce the pressure loss of the fluid flowing through the second liquid cooling component, and improve the heat exchange efficiency.

[0021] In the fifth technical solution, at least two first liquid collecting pipes are arranged in the liquid outlet collecting part and are communicated by the first liquid passage, and the first liquid passage is higher than the heat exchange flow channel. The cooling medium must first fill all the parallel heat exchange flow channels, and can flow out from the liquid outlet end only after the liquid level rises and passes the higher first liquid passage, so that the gas in the heat exchange flow channel is completely replaced and discharged by the rising liquid surface, and the exhaust capacity and heat exchange performance of the second liquid cooling component are further improved.

[0022] In the sixth technical solution, at least two second liquid collecting pipes are arranged in the liquid inlet collecting part and are communicated by the second liquid passage, and the second liquid passage is higher than the heat exchange flow channel, so that the liquid inlet end of the heat exchange flow channel also constitutes an exhaust structure for forced filling of the cooling medium. The exhaust structure cooperates with the exhaust structure of the liquid outlet collecting part to form a double-end exhaust guarantee mechanism at both ends of the heat exchange flow channel between the two, and the reliability and thoroughness of the self-exhaust function of the second liquid cooling component are further improved.

[0023] In the seventh technical solution, the liquid inlet end position of part of the second liquid cooling component is arranged to be lower than the liquid outlet end. This low-in high-out structural layout utilizes the natural upward floating trend of the gas. In the process of flowing from bottom to top, the cooling medium will carry the gas in the pipeline to the higher liquid outlet end for discharge, which is helpful to improve the exhaust performance of the system.

[0024] In the eighth technical solution, the outlet is not lower than the highest heat exchange channel, so that the outlet is always located at or above the top of the heat exchange channel, avoiding the formation of a new gas gathering point due to improper outlet position, and ensuring the smoothness of the exhaust flow path.

[0025] In the ninth technical solution, the heat exchange channel is designed to have a higher middle position than both ends, forming an inverted U-shaped top liquid collection part. Fluids must first fill the entire channel and pass over the highest middle point in order to pass through this path, thereby forcibly expelling any gas that may be present at the top of the channel.

[0026] The tenth technical solution provides a liquid-cooled transformer. Since the device uses the heat exchange structure described in any of the preceding solutions, it has high and comprehensive heat dissipation capacity and reliable self-venting function. This enables the liquid-cooled transformer to maintain efficient operation of the liquid cooling system for a long time without additional venting components, ensuring stable operating temperature of internal electronic components, thereby improving the operating reliability and service life of the entire liquid-cooled transformer. BRIEF DESCRIPTION OF DRAWINGS

[0027] To more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings needed in the embodiment description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art based on these drawings without creative labor.

[0028] Figure 1 A schematic diagram of the liquid cooling heat exchange structure according to the embodiments of the present application;

[0029] Figure 2 A schematic diagram of the structure of the second liquid cooling component according to the first embodiment of the present application;

[0030] Figure 3 A schematic diagram of the second liquid cooling component according to the first embodiment of the present application; Figure 2 A top view schematic diagram of the second liquid cooling component according to the first embodiment of the present application;

[0031] Figure 4 A schematic diagram of the A-A cross section according to the first embodiment of the present application; Figure 3 A schematic diagram of the B-B cross section according to the first embodiment of the present application;

[0032] Figure 5 A schematic diagram of the B-B cross section according to the first embodiment of the present application; Figure 3 A schematic diagram of the B-B cross section according to the first embodiment of the present application;

[0033] Figure 6 A schematic diagram of the structure of the second liquid cooling component according to the second embodiment of the present application;

[0034] Figure 7 A schematic diagram of the structure of the second liquid cooling component according to the second embodiment of the present application; Figure 6 A top view schematic diagram of the second liquid cooling component according to the second embodiment of the present application;

[0035] Figure 8 Fig. 2 is a schematic view of a cross section of the first liquid cooling component in the embodiment of the present application; Figure 7

[0036] Figure 9 Fig. 4 is a schematic view of a structure of the second liquid cooling component involved in the third embodiment of the present application;

[0037] Figure 10 Fig. 5 is a schematic view of a top view of the second liquid cooling component; Figure 9

[0038] Figure 11 Fig. 6 is a schematic view of a cross section of the second liquid cooling component. Figure 10

[0039] Explanation of main reference numerals:

[0040] First liquid cooling component 10;

[0041] Second liquid cooling component 20; heat exchange part 21; heat exchange flow channel 22; liquid inlet collecting part 23; liquid outlet collecting part 24; first liquid passage 25; first liquid collecting pipe 26; second liquid passage 27; second liquid collecting pipe 28; top liquid collecting part 29;

[0042] Fan 30;

[0043] Liquid cooling pipeline 41; first liquid inlet end 42; second liquid inlet end 43; heat exchange liquid inlet end 44; first liquid outlet end 45; second liquid outlet end 46; heat exchange liquid outlet end 47; liquid inlet pipe 48; liquid outlet pipe 49. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are the preferred embodiments of the present application, and should not be seen as excluding other embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0045] In the claims, specification, and above drawings of the present application, unless otherwise explicitly limited, the use of the terms "first", "second", or "third" etc. is intended to identify different objects, and is not intended to describe a particular order.

[0046] ​​​In the claims, the specification, and the drawings of the present application, terms such as "center", "transverse", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. indicate directions or positions based on the directions and positions shown in the drawings, and are used only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, so it cannot be understood as limiting the specific protection scope of the present application.

[0047] In the claims, the specification, and the drawings of the present application, unless otherwise expressly defined, the term "fixedly connected" or "fixedly connected" should be understood in a broad sense, that is, any connection mode between the two without displacement relationship and relative rotation relationship, that is, it includes non-detachable fixed connection, detachable fixed connection, integration and fixed connection through other devices or elements.

[0048] In the claims, the specification, and the drawings of the present application, the terms "include", "have" and their variants are intended to mean "contain but not limited to".

[0049] In the claims, the specification, and the drawings of the present application, unless otherwise expressly defined, some core terms in the present application should also be understood as follows:

[0050] "First liquid cooling component" and "second liquid cooling component" refer to two liquid cooling components with different functional positioning and structural form in the heat exchange structure. "First liquid cooling component" usually refers to the main liquid cooling component for directly mounting power electronic devices and conducting heat by contact, such as a horizontally arranged liquid cooling plate. "Second liquid cooling component" refers to a secondary liquid cooling component in communication with the liquid cooling pipeline of the first liquid cooling component for auxiliary heat dissipation, which can be an air-liquid heat exchanger for cooling the internal environment air of the equipment.

[0051] "Exhaust liquid cooling component" is not a completely independent component type in structure, but a functional designation of at least one "second liquid cooling component". The "exhaust liquid cooling component" is endowed with the function of the main exhaust point of the system through its specific height position in the entire heat exchange structure and specific pipeline connection mode.

[0052] "Liquid cooling pipeline" should be understood in a broad sense, which refers to the complete and closed path of the circulating flow of the cooling medium inside the heat exchange structure. This includes all flow channels, collection parts, liquid collecting pipes inside the first liquid cooling component and the second liquid cooling component, and external or internal pipes for connecting these components.

[0053] "liquid inlet end" and "liquid outlet end" refer to the interface of an independent component (such as the first liquid cooling component or the second liquid cooling component) or the entire heat exchange structure with external pipelines or other components for fluid exchange. Among them, the "liquid inlet end" is the port through which the cooling medium flows into the component or structure, and the "liquid outlet end" is the port through which the cooling medium flows out of the component or structure.

[0054] "heat exchange part" and "heat exchange flow channel" are used to describe the internal structure of the second liquid cooling component as an air-liquid heat exchanger. The "heat exchange part" refers to the main part used for heat exchange with air, usually a grid or fin array structure with a large surface area. The "heat exchange flow channel" refers to multiple, usually parallel channels inside the heat exchange part for the circulation of cooling medium.

[0055] "liquid inlet collection part" and "liquid outlet collection part" refer to the manifold or chamber structure arranged at both ends of multiple parallel heat exchange flow channels. The "liquid inlet collection part" is used to evenly distribute the cooling medium flowing in from the liquid inlet end to each heat exchange flow channel, and the "liquid outlet collection part" is used to collect the cooling medium after flowing through each heat exchange flow channel and guide it to the liquid outlet end.

[0056] "first liquid collection pipe", "second liquid collection pipe", "first liquid passage", and "second liquid passage" are specific components used to form the forced exhaust microstructure. The "liquid collection pipe" refers to the vertically divided chamber or pipe that constitutes the liquid inlet collection part or the liquid outlet collection part. The "liquid passage" refers to the opening or channel that connects these internal chambers at a specific height position (usually high position), forming a "fill first and then overflow" exhaust mechanism.

[0057] "top liquid collection part" refers to a common chamber located at the highest point of multiple parallel heat exchange flow channels in a reverse U-shaped flow path design. It is connected to the top of each heat exchange flow channel, and fluid must pass through this structure to complete the cycle.

[0058] "Cooling source" refers to an external independent system that provides low-temperature cooling medium for the heat exchange structure, such as a liquid cooling unit or a dry cooler, which usually includes components such as pumps, heat exchangers, and liquid storage tanks. "Cooling medium" refers to the fluid circulating between the cooling source and the liquid cooling pipeline of the heat exchange structure, used to absorb and carry away heat, which can be deionized water, ethylene glycol solution, or special heat-conducting liquid.

[0059] "Close to set" is used to describe the relationship between two ports or positions, not necessarily meaning that they must be directly connected or have a very small geometric distance, but that they are in equivalent or approximately equivalent positions in the fluid dynamics of the liquid cooling pipeline. For example, "liquid inlet end close to set" means that two different liquid inlet ends are connected to a common or adjacent pressure source, so that the pressure at their inlets is basically the same, ensuring that the parallel branches connected to them can obtain approximately the same driving pressure difference.

[0060] "Parallel arrangement" refers to the connection mode of multiple heat exchange channels, that is, the inlet of each heat exchange channel is in communication with the liquid inlet collecting part, and the outlet is in communication with the liquid outlet collecting part, so that the total fluid is distributed into each channel and flows at the same time.

[0061] Embodiment one

[0062] Embodiment one of the present application relates to a liquid-cooled converter, which includes a cabinet, a plurality of power devices and other electronic devices, and further includes a liquid-cooled heat exchange structure. At least part of the power devices are heat exchanged through the first liquid cooling part 10 and the second liquid cooling part 20 in the liquid-cooled heat exchange structure. The power devices in the converter can be IGBT modules.

[0063] Specifically, the liquid-cooled converter can be a sealed energy storage converter cabinet. The bottom of the cabinet is provided with a liquid-cooled plate as the first liquid cooling part 10, and the main heat-generating power electronic devices such as IGBT modules are tightly installed on the liquid-cooled plate for efficient conduction heat dissipation by direct contact. At the same time, a plurality of air-cooled heat exchangers according to the adopted liquid-cooled heat exchange structure as the second liquid cooling part 20 are vertically arranged in the cabinet. The fan 30 forcibly circulates air in the cabinet to flow through these air-cooled heat exchangers, thereby cooling the internal environment air of the entire cabinet to provide convective heat dissipation for the auxiliary electronic devices such as capacitors, inductors and control boards that cannot be directly liquid-cooled. The entire heat exchange structure is provided with a passive exhaust function, so that the liquid-cooled converter can maintain efficient operation of the liquid cooling system for a long time without additional exhaust components, ensuring the stable working temperature of the internal electronic devices, thereby improving the operation reliability and service life of the entire liquid-cooled converter.

[0064] The liquid-cooled heat exchange structure related in the embodiment mainly includes the first liquid cooling part 10 and the second liquid cooling part 20, or can also include the fan 30.

[0065] The liquid-cooled heat exchange structure related in the embodiment includes the first liquid cooling part 10 for interfacing with the cold source to circulate the cooling medium inside, and at least one second liquid cooling part 20 arranged in the first liquid cooling part 10 and in communication with the liquid cooling pipeline 41 of the first liquid cooling part 10 to circulate the cooling medium inside; wherein one of the second liquid cooling parts 20 is an exhaust liquid cooling part, the highest part of the liquid cooling pipeline 41 in the exhaust liquid cooling part is higher than the highest part of the liquid cooling pipeline 41 in the first liquid cooling part 10, and the inlet end of the exhaust liquid cooling part is arranged close to the inlet end of the first liquid cooling part 10, and the outlet end of the exhaust liquid cooling part is arranged close to the outlet end of the first liquid cooling part 10.

[0066] Reference Figure 1The first liquid cooling member 10 is a liquid cooling plate, which is a substantially flat plate-shaped member, and has a liquid cooling flow channel formed inside. The liquid cooling flow channel has a first liquid inlet end 42 and a first liquid outlet end 45 formed at the inlet and outlet of the liquid cooling flow channel respectively, and the liquid cooling flow channel, the first liquid inlet end 42 and the first liquid outlet end 45 cooperatively form a liquid cooling pipeline 41 of the first liquid cooling member 10. The liquid cooling flow channel inside the first liquid cooling member 10 can be designed in a conventional manner, but in this embodiment, the first liquid inlet end 42 and the first liquid outlet end 45 are arranged at the same end of the first liquid cooling member 10 to reduce the distance between the first liquid inlet end 42 and the first liquid outlet end 45, and to facilitate the pipeline arrangement between the first liquid cooling member 10 and the external cooling source through the first liquid inlet end 42 and the first liquid outlet end 45. After the external cooling source is connected to the first liquid inlet end 42 and the first liquid outlet end 45, the cooling medium in the cooling source can be delivered to the first liquid cooling member 10 and circulated in the liquid cooling pipeline 41 of the first liquid cooling member 10. In this embodiment, the cooling medium can be a conventional cooling liquid, such as deionized water, mineral oil, ethylene glycol solution, etc.

[0067] In this embodiment, one of the plurality of second liquid cooling members 20 is an exhaust liquid cooling member, which is also used to cool the electronic devices inside the liquid cooling converter. The exhaust liquid cooling member can be in direct contact with the electronic devices to be cooled, or can lower the internal temperature of the liquid cooling converter under the action of the fan 30. The exhaust liquid cooling member is independently arranged on the first liquid cooling member 10 and is in communication with the liquid cooling pipeline 41 in the first liquid cooling member 10. The second liquid inlet end 43 and the second liquid outlet end 46 of the exhaust liquid cooling member are not simply communicated to the liquid cooling pipeline 41 in the first liquid cooling member 10, but are arranged close to the first liquid inlet end 42 and the first liquid outlet end 45 respectively. Specifically, a communication port can be arranged in the liquid cooling flow channel inside the first liquid cooling member 10 close to the first liquid inlet end 42 to communicate with the second liquid inlet end 43 of the exhaust liquid cooling member. At the same time, a liquid cooling flow channel is directly extended from the first liquid outlet end 45 to a position close to the exhaust liquid cooling member, and the second liquid outlet end 46 of the exhaust liquid cooling member is communicated with the liquid cooling flow channel, so as to arrange the first liquid inlet end 42, the first liquid outlet end 45, the second liquid inlet end 43 and the second liquid outlet end 46 of the exhaust liquid cooling member as close as possible respectively.

[0068] The highest point of the liquid cooling pipeline 41 of the exhaust liquid cooling device is set to be higher than the highest point of the liquid cooling pipeline 41 of the first liquid cooling device 10 and the highest point of the liquid cooling pipeline 41 of any other second liquid cooling device 20. For example, since the first liquid cooling device 10 is a liquid cooling plate, the exhaust liquid cooling device is vertically installed above the first liquid cooling device 10, so that the highest point of the liquid cooling pipeline 41 of the exhaust liquid cooling device is higher than the highest point of the liquid cooling pipeline 41 of the first liquid cooling device 10. Meanwhile, the height of the exhaust liquid cooling device is higher than the height of the other second liquid cooling devices 20, for example, in the case where the layout of the liquid cooling pipeline 41 in the plurality of second liquid cooling devices 20 is the same, the exhaust liquid cooling device is made higher, so that the highest point of the liquid cooling pipeline 41 of the exhaust liquid cooling device is higher than the highest point of the liquid cooling pipeline 41 of the other second liquid cooling devices 20; in the case where the layout of the liquid cooling pipeline 41 in the plurality of second liquid cooling devices 20 is different, as long as the highest point of the liquid cooling pipeline 41 of the exhaust liquid cooling device is higher than the highest point of the liquid cooling pipeline 41 of the other second liquid cooling devices 20.

[0069] It should be noted that the highest point here refers to the highest part of the liquid cooling pipeline 41 in the first liquid cooling device 10 and the second liquid cooling device 20 compared to the ground height when the liquid cooling inverter is normally installed and used. In other cases, such as transportation, manufacturing and other links, the liquid cooling inverter may be tilted or in other postures, at this time, the definition of "the highest point of the liquid cooling pipeline 41" is not applicable.

[0070] Based on the physical property that the gas density in the fluid is lower than the liquid density, the gas will naturally gather to the highest point of the entire heat exchange structure under the action of gravity. Therefore, the exhaust liquid cooling device becomes the natural gathering point of residual gas in the entire liquid cooling system. Meanwhile, the liquid inlet end of the exhaust liquid cooling device is arranged close to the liquid inlet end of the first liquid cooling device 10, and the liquid outlet end is also arranged close to the liquid outlet end of the first liquid cooling device 10. Since the liquid inlet end and the liquid outlet end of the first liquid cooling device 10 are directly connected to the cold source, the pressure difference between them is the largest, and the position of the liquid inlet end and the liquid outlet end of the exhaust liquid cooling device makes them also have a large pressure difference. Under the circulating power provided by the cold source, the pressure difference provides sufficient driving force for the cooling medium flowing through the exhaust liquid cooling device, which can overcome the air resistance formed by the gathered gas, forcibly push the cooling medium to flow through the exhaust liquid cooling device, and carry the gas gathered therein to the main flow path for discharge. In summary, the heat exchange structure creatively couples the two technical means of high point gas collection and large pressure difference driving together, forming a complete and automatically running exhaust scheme, which improves the technical problem that the gas in the liquid cooling pipeline 41 is difficult to exhaust in the prior art, and does not need to add additional exhaust valves and other components, simplifies the structure and improves the long-term running reliability of the system.

[0071] Further, the lowest part of the liquid cooling pipeline 41 of the second liquid cooling member 20 as the exhaust liquid cooling member is flush with the highest part of the liquid cooling pipeline 41 of the first liquid cooling member 10. Specifically, refer to Figure 1 Since the first liquid cooling member 10 is a liquid cooling plate, the height positions of the liquid cooling pipeline 41 at different positions of the first liquid cooling member 10 are the same when the liquid cooling transformer is normally installed and used. At this time, since the exhaust liquid cooling member is vertically arranged, the lowest part of the liquid cooling pipeline 41 of the exhaust liquid cooling member is the second liquid inlet end 43 and the second liquid outlet end 46, and the second liquid inlet end 43 and the second liquid outlet end 46 will not necessarily be lower than the highest part of the liquid cooling pipeline 41 of the first liquid cooling member 10. In other embodiments, the first liquid cooling member 10 can have different height positions at different positions. At this time, the second liquid inlet end 43 and the second liquid outlet end 46 of the exhaust liquid cooling member can be arranged at the highest part of the liquid cooling pipeline 41 of the first liquid cooling member 10. In this way, it is ensured that the second liquid cooling member 20 as the exhaust liquid cooling member is overall above the first liquid cooling member 10 in the vertical direction, and the gas in the first liquid cooling member 10 will quickly gather to the exhaust liquid cooling member. The gas gathering effect is more certain and concentrated, thereby improving the efficiency and thoroughness of exhaust.

[0072] In addition, in the present embodiment, each second liquid cooling member 20 is provided with a heat exchange part 21 corresponding to at least one fan 30 for driving air to pass through the heat exchange part 21, and the liquid cooling pipeline 41 in the second liquid cooling member 20 is formed with a plurality of heat exchange flow channels 22 for the flow of cooling medium corresponding to the heat exchange part 21. Specifically, refer to Figure 2The heat exchange part 21 can be provided as a solid structure with multiple mesh holes for air flow to pass through, and multiple heat exchange channels 22 are arranged therein, which are used to circulate the liquid cooling medium as part of the liquid cooling pipeline 41 of the second liquid cooling member 20. The fan 30 can be fixedly arranged on one side of the heat exchange part 21 of the second liquid cooling member 20, so as to suck in the air flow with a higher temperature and guide the air flow to pass through the heat exchange part 21, and then discharge the air flow with a lower temperature to the internal environment of the liquid cooling converter. The fan 30 can be directly fixedly installed on the second liquid cooling member 20, or can be independently fixedly installed on the first liquid cooling member 10. One heat exchange part 21 of one second liquid cooling member 20 can correspondingly be provided with one fan 30, or can correspondingly be provided with multiple fans 30, mainly depending on the size of the heat exchange part 21 and the size of the fan 30. By additionally arranging the fan 30 and enabling the second liquid cooling member 20 to have the heat exchange part 21 for air flow and the heat exchange channel 22 for cooling medium flow, the second liquid cooling member 20 is endowed with the function of air-liquid heat exchange. This enables the heat exchange structure not only to conductively dissipate heat of the electronic devices in direct contact with the first liquid cooling member 10, but also to actively cool the air in the internal environment of the device shell through the second liquid cooling member 20, thereby convectively dissipating heat of the devices that cannot be in direct contact with the first liquid cooling member 10 and the entire internal environment, and achieving more comprehensive and balanced temperature control of the liquid cooling converter.

[0073] Further, the heat exchange channels 22 are arranged in parallel; the liquid cooling pipeline 41 in the second liquid cooling member 20 is formed with a liquid inlet collecting part 23 and a liquid outlet collecting part 24 at two ends corresponding to the heat exchange channels 22; the liquid inlet collecting part 23 is in communication with the liquid inlet end of the second liquid cooling member 20, and the liquid outlet collecting part 24 is in communication with the liquid outlet end of the second liquid cooling member 20. Specifically, the liquid inlet collecting part 23 and the liquid outlet collecting part 24 are cavities with certain internal spaces arranged in the second liquid cooling member 20, and the cavities have openings in communication with the second liquid inlet end 43 or the second liquid outlet end 46 through the liquid inlet pipe 48 and the liquid outlet pipe 49, and are also in communication with the liquid inlet end and the liquid outlet end of each heat exchange channel 22, i.e., the heat exchange liquid inlet end 44 and the heat exchange liquid outlet end 47, so as to realize the parallel arrangement of each heat exchange channel 22. After the cooling medium enters the liquid inlet collecting part 23, it is evenly distributed to each heat exchange channel 22 in parallel, and after the cooling medium flows through the heat exchange channel 22 and completes heat exchange, the cooling medium with a higher temperature flows into the liquid outlet collecting part 24 and then flows out to the liquid cooling channel of the first liquid cooling member 10 through the second liquid outlet end 46. The internal heat exchange channels 22 of the second liquid cooling member 20 are designed to be arranged in parallel, and the liquid inlet collecting part 23 and the liquid outlet collecting part 24 are arranged. The liquid inlet pipe 48 and the liquid outlet pipe 49 are tubular members vertically extending and fixedly connected to the first liquid cooling member 10 as part of the second liquid cooling member 20. The parallel structure can provide a larger heat exchange contact area for the cooling medium under the premise of ensuring the total flow, and effectively reduces the pressure loss of the fluid flowing through the second liquid cooling member 20, thereby improving the heat exchange efficiency.

[0074] With reference to Figures 2 to 5 In this embodiment, the liquid outlet collecting portion 24 of the liquid cooling pipeline 41 of the second liquid cooling member 20 includes at least two first liquid collecting pipes 26 connected by the first liquid passage 25, and one of the first liquid collecting pipes 26 is provided with the liquid outlet end of the liquid outlet collecting portion 24. The liquid inlet collecting portion 23 is connected to the first liquid collecting pipe 26 of the liquid outlet collecting portion 24 which is not provided with the liquid outlet end of the liquid outlet collecting portion 24 through at least part of the heat exchange flow channel 22. The first liquid passage 25 is higher than the liquid outlet end of the liquid outlet collecting portion 24 and is not lower than the highest heat exchange flow channel 22. Specifically, the liquid outlet collecting portion 24 is divided into two vertical first liquid collecting pipes 26 in structure. The heat exchange liquid outlet end 47 of all the heat exchange flow channels 22 is connected to the inner first liquid collecting pipe 26. The outer first liquid collecting pipe 26 is connected to the final liquid outlet pipe 49. The two first liquid collecting pipes 26 are not connected at the bottom and the side, but are connected at the top through one or more first liquid passages 25. Therefore, after the cooling medium flows out of the heat exchange flow channel 22, the inner first liquid collecting pipe 26 must be completely filled, the liquid level rises to the top, and the cooling medium can enter the outer first liquid collecting pipe 26 and flow out only after passing through the first liquid passage 25. By providing at least two first liquid collecting pipes 26 connected by the first liquid passage 25 in the liquid outlet collecting portion 24 and making the first liquid passage 25 higher than the heat exchange flow channel 22, the cooling medium must first fill all the parallel heat exchange flow channels 22, and the liquid level rises and passes through the higher first liquid passage 25 before flowing out of the liquid outlet end, which ensures that the gas inside the heat exchange flow channel 22 is completely replaced and discharged by the rising liquid level, further improving the exhaust capacity and heat exchange performance of the second liquid cooling member 20.

[0075] Further, with reference to Figures 2 to 5The liquid inlet collecting part 23 comprises at least two second liquid collecting pipes 28 connected by the second liquid passage 27, and one of the second liquid collecting pipes 28 is provided with the liquid inlet end of the liquid inlet collecting part 23. The second liquid collecting pipe 28 provided with the liquid inlet end of the liquid inlet collecting part 23 in the liquid inlet collecting part 23 is connected to the first liquid collecting pipe 26 not provided with the liquid outlet end of the liquid outlet collecting part 24 through the heat exchange channel 22. The second liquid passage 27 is higher than the liquid inlet end of the liquid inlet collecting part 23 and is not lower than the highest heat exchange channel 22. Specifically, corresponding to the structure of the liquid outlet collecting part 24, the liquid inlet collecting part 23 is also divided into two vertical second liquid collecting pipes 28. The outer second liquid collecting pipe 28 is connected to the liquid inlet pipe 48 as the inlet of the cooling medium. The inner second liquid collecting pipe 28 is connected to the heat exchange liquid inlet end 44 of all the heat exchange channels 22 and is responsible for distributing the cooling medium. The two second liquid collecting pipes 28 are connected only at the top through one or more second liquid passages 27. Therefore, after the cooling medium enters, it must first fill the outer second liquid collecting pipe 28, cross the second liquid passage 27 at the top, and then enter the inner second liquid collecting pipe 28 and finally flow to the heat exchange channel 22. By providing at least two second liquid collecting pipes 28 connected by the second liquid passage 27 in the liquid inlet collecting part 23 and making the second liquid passage 27 higher than the heat exchange channel 22, an exhaust structure for forcibly filling the cooling medium is formed at the liquid inlet end of the heat exchange channel 22. The exhaust structure cooperates with the exhaust structure of the liquid outlet collecting part 24 to form a double-end exhaust guarantee mechanism between the two ends of the heat exchange channel 22, further ensuring and improving the reliability and completeness of the self-exhaust function of the second liquid cooling component 20.

[0076] Embodiment Two

[0077] The difference between Embodiment Two and Embodiment One is that the structure of the second liquid cooling component 20 is different.

[0078] With reference to Figures 6 to 8 , the position of the liquid inlet end of the liquid inlet collecting part 23 in at least part of the liquid cooling pipeline 41 of the second liquid cooling component 20 is lower than the position of the liquid outlet end of the liquid outlet collecting part 24. Specifically, the liquid inlet collecting part 23 and the liquid outlet collecting part 24 can be simple single-chamber manifolds. The low-in high-out feature is mainly realized by the connection mode of the external pipeline. For example, the liquid inlet pipe 48 is connected to the lower half of the liquid inlet collecting part 23, and the liquid outlet pipe 49 is connected to the upper half of the liquid outlet collecting part 24. This low-in high-out structural layout takes advantage of the natural tendency of gas to float in liquid. During the upward flow of the cooling medium, the gas in the pipeline will be carried to the higher liquid outlet end and discharged, which helps to improve the exhaust performance of the system.

[0079] Further, with reference to Figures 6 to 8The liquid outlet end of the liquid outlet collecting portion 24 is not lower than the highest heat exchange flow channel 22. Specifically, the connecting point of the liquid outlet pipe 49 and the liquid outlet collecting portion 24 is equal to or higher than the center line height of the topmost heat exchange flow channel 22 in the vertical height. This ensures that the liquid outlet is always located at or above the top of the heat exchange flow channel 22, avoiding the formation of a new gas collection point due to improper liquid outlet position, and ensuring the smoothness of the exhaust flow path.

[0080] It should be noted that the second liquid cooling member 20 provided in Embodiment One and Embodiment Two can be used simultaneously in the liquid cooling heat exchange structure.

[0081] Embodiment Three

[0082] Embodiment Three differs from Embodiment One in that the structure of the second liquid cooling member 20 is different.

[0083] Reference Figures 9 to 11 In at least part of the liquid cooling pipeline 41 of the second liquid cooling member 20, each heat exchange flow channel 22 is provided with a top liquid collecting portion 29 at the middle position along the cooling medium flow direction, which simultaneously communicates with each heat exchange flow channel 22, and the liquid inlet end and the liquid outlet end of each heat exchange flow channel 22 are lower than the top liquid collecting portion 29. Specifically, each heat exchange flow channel 22 is no longer a simple horizontal pipeline. Each heat exchange flow channel 22 flows upward after being drawn from the liquid inlet collecting portion 23, enters a top liquid collecting portion 29 located at the top end of the entire heat exchange portion 21, which is shared by all flow channels, and then flows downward, and finally enters the liquid outlet collecting portion 24. The heat exchange flow channel 22 is designed to have a structure in which the middle position is higher than both ends, forming a top liquid collecting portion 29 in the shape of an inverted U. In order for the fluid to pass through this path, it must first fill the entire flow channel and pass over the highest point in the middle, thereby forcibly expelling the gas that may be present at the top of the flow channel.

[0084] It should be noted that the second liquid cooling member 20 provided in Embodiment One, Embodiment Two, and Embodiment Three can be used simultaneously in the liquid cooling heat exchange structure.

[0085] The above description and embodiment of the application are used to explain the scope of protection of the application, but do not constitute a limitation on the scope of protection of the application. Through the inspiration of the present application or the above-mentioned embodiments, those skilled in the art can combine common knowledge, ordinary technical knowledge in the art, and / or existing technology to obtain modifications, equivalent replacements, or other improvements of the embodiments of the present application or part of the technical features thereof through logical analysis, reasoning, or limited experiments, which should be included in the protection scope of the present application.

Claims

1. A liquid cooling heat exchange structure comprising a first liquid cooling member (10) for interfacing with a cold source to circulate a cooling medium inside, characterized in that, The application relates to a liquid cooling device for a high-power electronic device, comprising: at least one second liquid cooling component (20) arranged in the first liquid cooling component (10) and communicating with the liquid cooling pipeline (41) of the first liquid cooling component (10) to circulate cooling medium inside; wherein one of the second liquid cooling components (20) is an exhaust liquid cooling component, the highest position of the liquid cooling pipeline (41) of the exhaust liquid cooling component is higher than the highest position of the liquid cooling pipeline (41) of the first liquid cooling component (10) and the highest position of the liquid cooling pipeline (41) of any other second liquid cooling component (20), and the liquid inlet end of the exhaust liquid cooling component is arranged close to the liquid inlet end of the first liquid cooling component (10), and the liquid outlet end of the exhaust liquid cooling component is arranged close to the liquid outlet end of the first liquid cooling component (10).

2. The liquid cooling heat exchange structure of claim 1, wherein, The lowest position of the liquid cooling pipeline (41) of the second liquid cooling component (20) serving as the exhaust liquid cooling component is flush with the highest position of the liquid cooling pipeline (41) of the first liquid cooling component (10).

3. The liquid cooling heat exchange structure of claim 1, wherein, The liquid cooling device further comprises at least one fan (30), each second liquid cooling component (20) is provided with a heat exchange part (21) corresponding to the at least one fan (30), and the fan (30) is used to drive air to pass through the heat exchange part (21); the liquid cooling pipeline (41) in the second liquid cooling component (20) is formed with a plurality of heat exchange flow channels (22) for cooling medium to pass through, corresponding to the heat exchange part (21).

4. The liquid cooling heat exchange structure of claim 3, wherein, The heat exchange flow channels (22) are arranged in parallel; the liquid cooling pipeline (41) in the second liquid cooling component (20) is formed with a liquid inlet collecting part (23) and a liquid outlet collecting part (24) corresponding to the two ends of the heat exchange flow channel (22) respectively; the liquid inlet collecting part (23) communicates with the liquid inlet end of the second liquid cooling component (20), and the liquid outlet collecting part (24) communicates with the liquid outlet end of the second liquid cooling component (20).

5. The liquid cooling heat exchange structure of claim 4, wherein, In at least part of the liquid cooling pipeline (41) of the second liquid cooling component (20), the liquid outlet collecting part (24) comprises at least two first liquid collecting pipes (26) communicated by a first liquid passage (25), and one of the first liquid collecting pipes (26) is provided with the liquid outlet end of the liquid outlet collecting part (24); the liquid inlet collecting part (23) communicates the first liquid collecting pipe (26) without the liquid outlet end of the liquid outlet collecting part (24) in the liquid outlet collecting part (24) through at least part of the heat exchange flow channel (22); the first liquid passage (25) is higher than the liquid outlet end of the liquid outlet collecting part (24) and is not lower than the heat exchange flow channel (22) at the highest position.

6. The liquid cooling heat exchange structure of claim 5, wherein, The liquid inlet collecting part (23) comprises at least two second liquid collecting pipes (28) communicated by a second liquid passage (27), and one of the second liquid collecting pipes (28) is provided with the liquid inlet end of the liquid inlet collecting part (23); the second liquid collecting pipe (28) provided with the liquid inlet end of the liquid inlet collecting part (23) is communicated with the first liquid collecting pipe (26) not provided with the liquid outlet end of the liquid outlet collecting part (24) in the liquid outlet collecting part (24) through the heat exchange flow channel (22); the second liquid passage (27) is higher than the liquid inlet end of the liquid inlet collecting part (23) and is not lower than the highest heat exchange flow channel (22).

7. The liquid cooling heat exchange structure of claim 4, wherein, In at least part of the liquid cooling pipeline (41) of the second liquid cooling member (20), the position of the liquid inlet end of the liquid inlet collecting part (23) is lower than the liquid outlet end of the liquid outlet collecting part (24).

8. The liquid cooling heat exchange structure of claim 7, wherein, The liquid outlet end of the liquid outlet collecting part (24) is not lower than the highest heat exchange flow channel (22).

9. The liquid cooling heat exchange structure of claim 4, wherein, In at least part of the liquid cooling pipeline (41) of the second liquid cooling member (20), each heat exchange flow channel (22) is provided with a top liquid collecting part (29) communicated with each heat exchange flow channel (22) at the middle position in the cooling medium flow direction, and the liquid inlet end and the liquid outlet end of each heat exchange flow channel (22) are lower than the top liquid collecting part (29).

10. A liquid-cooled power converter comprising a number of power devices, characterized in that Further comprising the liquid cooling heat exchange structure according to any one of claims 1-9, and at least part of the power devices are heat exchanged through the first liquid cooling member (10) and the second liquid cooling member (20).

Images