Radiator, method for manufacturing a radiator, and remote radio unit

Abstract

A radiator (10), a method for manufacturing the radiator (10), and a remote radio unit are provided. The radiator (10) includes a tank (11) and a heat dissipation component (12) disposed within the tank (11). The heat dissipation component (12) includes a housing (121), which has a receiving cavity (122) for receiving a coolant. The heat dissipation component (12) contacts a heat source component (20) of the remote radio unit using a first opening (111) on one side of the tank (11). The coolant within the receiving cavity (122) absorbs heat dissipated from the heat source component (20) and then vaporizes and evaporates within the receiving cavity (122). The vaporized working fluid condenses and releases heat when it comes into contact with the low-temperature inner wall of the cavity 122 (such as the top of the cavity 122), and the condensed cooling fluid flows back to the bottom of the cavity 122. By repeating this cycle, uniform heat dissipation and high temperature equalization performance are achieved, effectively improving the heat dissipation effect of the radiator 10.

Description

[Technical field]

[0001] The present application relates to the field of communication technology, and in particular to a radiator, a method for manufacturing a radiator, and a remote radio unit. [Background technology]

[0002] A remote radio unit is located between the base station and the mobile terminal, and is connected to the upper base station by using an optical fiber. The remote radio unit is used to transmit and receive radio frequency signals to and from the upper base station under the control of the base station controller. With the continuous improvement of network performance, the integration of the remote radio unit is constantly improved, and the requirements for the heat dissipation capability of the remote radio unit are also continuously improved.

[0003] At present, in conventional remote radio units, a die-cast aluminum alloy radiator is usually used as the main heat dissipation means for heat dissipation. Specifically, the die-cast aluminum alloy radiator includes a substrate and a plurality of heat sink fins arranged on the substrate, and the heat sink fins are arranged on one side of the substrate at equal intervals in parallel. The heat source components of the remote radio unit are in contact with the other side of the substrate, and the molding material of the substrate and the molding material of the heat sink fins are both die-cast aluminum alloy. The heat of the heat generating element is sequentially diffused to the substrate and the heat sink fins, and the substrate and the heat sink fins are used to exchange heat with the surroundings and dissipate heat.

[0004] However, in the above radiator, the substrate in direct contact with the heat source is a die-cast aluminum alloy substrate, which is limited by the relatively low thermal conductivity of the substrate material, and the uniformity of heat dissipation is relatively poor, resulting in a poor heat dissipation effect of the radiator. Summary of the Invention

[0005] The present application provides a radiator, a manufacturing method for the radiator, and a remote radio unit to effectively improve the heat dissipation effect of the radiator and solve the problem that the heat dissipation effect of the existing radiator is poor due to the relatively low thermal conductivity of the material of the substrate in contact with the heat source.

[0006] According to a first aspect, the present application provides a radiator for use in dissipating heat in a remote radio unit, comprising a tank and a heat dissipation component disposed within the tank.

[0007] The heat dissipation component includes a housing having a receiving cavity for receiving a coolant and a first opening on one side of the tank, the heat dissipation component contacting a heat source component of the remote radio unit using the first opening.

[0008] In this way, the coolant in the accommodating cavity absorbs the heat dissipated from the heat source component, and then vaporizes and evaporates into the accommodating cavity. When the vaporized and evaporated working fluid comes into contact with the relatively low-temperature inner wall of the accommodating cavity (such as the top of the accommodating cavity), it condenses and releases heat, and the condensed coolant flows back to the bottom of the accommodating cavity. By repeating this cycle, uniform heat dissipation is achieved. Compared with existing aluminum die-cast radiators, the heat dissipation component comes into direct contact with the heat source, and gas-liquid two-phase heat dissipation can be formed in the heat dissipation component, achieving a relatively high temperature equalization performance. Therefore, the heat dissipation effect of the radiator is effectively improved.

[0009] In addition, compared with the die-cast aluminum heat sink fins used in existing radiators, the gas-liquid two-phase heat dissipation method formed in the heat dissipation component can significantly reduce the thermal resistance of the heat transfer path and improve the heat dissipation effect of the radiator.

[0010] In a possible implementation of the first aspect, there is further a second opening on a side relative to the tank and opposite the first opening, and the heat dissipation component is positioned within the tank using the second opening.

[0011] The second opening may be used to position a heat dissipating component within the tank and may also facilitate fastening the tank and the heat dissipating component together.

[0012] In a possible implementation of the first aspect, a first end related to the heat dissipation component and proximate to the first opening is fixedly connected to the tank, and there are protrusions and / or grooves on an outer wall related to the first end and in contact with an inner wall of the tank.

[0013] The protrusions and / or grooves are located on the outer wall relating to the first end and in contact with the inner wall of the tank, thereby increasing the contact area between the heat dissipation component and the tank, thus increasing the strength of the connection between the heat dissipation component and the tank, and improving the robustness and stability of the radiator.

[0014] In possible implementations of the first aspect, the protrusions and / or grooves are associated with the heat dissipation component and are located at an end closer to the bottom of the tank, or the protrusions and / or grooves are associated with the heat dissipation component and are located at an end away from the bottom of the tank.

[0015] If the protrusion and / or groove is related to the heat dissipation component and located at the end close to the bottom of the tank, the cross section of the bottom plate of the heat dissipation component is inverted T-shaped. If the protrusion and / or groove is related to the heat dissipation component and located at the end away from the bottom of the tank, the cross section of the bottom plate is T-shaped. Similarly, the provision of the protrusion and / or groove can improve the robustness of the connection between the tank and the heat dissipation component, and the cross section of the bottom plate is T-shaped or inverted T-shaped. In addition to improving the robustness of the connection, the complexity of the heat dissipation component is reduced, and the molding of the heat dissipation component is facilitated. Also, when the heat dissipation component and the tank are fixedly connected by the friction stir welding method, the cross section of the bottom plate is T-shaped or inverted T-shaped, which can facilitate the placement and operation of the stir bar.

[0016] In a possible implementation of the first aspect, the heat dissipation component is fixedly arranged in the tank by welding.

[0017] The welding method includes at least one of friction stir welding, brazing, or laser welding.

[0018] Compared to fastening using screws, fixing the heat dissipation components inside the tank using a welding method improves the integrity of the radiator and reduces the risk of air leakage from the heat dissipation components.

[0019] In a possible implementation of the first aspect, the radiator further comprises a fastener, and fastening holes cooperating with the fastener are provided in the heat dissipation component and in the tank, and the heat dissipation component is fixedly positioned in the tank by cooperation between the fastener and the fastening holes.

[0020] When the heat dissipation component and the tank are fixed in a manner in which the fastener cooperates with the fastening hole, the solution is simple, the process is mature, the implementation is easy, and the cost is relatively low.

[0021] In a possible implementation of the first aspect, the radiator further comprises a sealing layer, the sealing layer being arranged between an outer wall of the heat dissipation component and an inner wall of the tank.

[0022] When the heat dissipation component and the tank are fixedly connected in a manner in which the fastener cooperates with the fastening hole, the fastening hole is provided in the heat dissipation component, so that the airtightness of the heat dissipation component may be relatively low. Therefore, by disposing a sealing layer between the outer wall of the heat dissipation component and the inner wall of the tank, the airtightness of the connection between the heat dissipation component and the tank can be improved and the risk of air leakage can be reduced.

[0023] In a possible implementation of the first aspect, the heat dissipation component is fixedly arranged in the tank by in-mold hot mounting.

[0024] Specifically, when a mold is used to mold the tank, the heat dissipation component can be placed inside the tank, and placing the heat dissipation component inside the tank when molding the tank can simplify the process and reduce costs.

[0025] In a possible implementation of the first aspect, the housing includes a bottom plate, a top plate, and a number of heat sink fins disposed between the bottom plate and the top plate, the bottom plate, the top plate, and the heat sink fins all being hollow structures, and the hollow structures of the bottom plate, the heat sink fins, and the top plate are connected to form a receiving cavity.

[0026] Compared with the existing die-cast aluminum alloy plate, the housing of the heat dissipation component includes a bottom plate, an upper plate, and a heat sink fin, the bottom plate can contact the heat source component using a first opening, the bottom plate, the upper plate, and the heat sink fin are hollow structures and connected to form an accommodating cavity, the cooling liquid is injected into the accommodating cavity, and a gas-liquid two-phase heat dissipation manner is formed in the housing, the temperature equalization is relatively high, and the heat dissipation efficiency is effectively improved. There may be multiple heat dissipation fins, and the multiple heat dissipation fins may be arranged in parallel at equal intervals. The multiple heat sink fins can provide more accommodating space and further increase the contact area for evaporation or condensation, thus further improving the heat dissipation effect.

[0027] According to a second aspect, the present application provides a method for manufacturing a radiator, the radiator being used for heat dissipation of a remote radio unit, the method comprising the steps of: forming a heat dissipation component, the heat dissipation component including a housing, the housing including a receiving cavity used for receiving a coolant; forming a tank and disposing the heat dissipation component in the tank, the heat dissipation component contacting a heat source component of the remote radio unit using a first opening on one side of the tank.

[0028] In the radiator formed using the above steps, the heat dissipation component is in contact with the heat source component, and the heat dissipation component includes a receiving cavity used for receiving a cooling liquid. The cooling liquid in the receiving cavity is vaporized and evaporated into the receiving cavity after absorbing the heat dissipated from the heat source component. When the vaporized and evaporated working liquid comes into contact with the inner wall of the receiving cavity (such as the top of the receiving cavity) which is relatively low temperature, it condenses and releases heat, and the condensed cooling liquid flows back to the bottom of the receiving cavity. By repeating this cycle, uniform heat dissipation is realized. Since a relatively high temperature equalization performance is achieved, the heat dissipation effect of the radiator is effectively improved.

[0029] In a possible implementation of the second aspect, the step of forming a tank and disposing a heat dissipation component in the tank includes the steps of: forming the tank; and fixing and disposing the heat dissipation component in the tank by a welding method.

[0030] In this way, the heat dissipation components are placed in the tank by a welding method, which can improve the integrity of the radiator and reduce the risk of air leakage from the heat dissipation components.

[0031] In a possible embodiment of the second aspect, the step of fixedly positioning the heat dissipation component within the tank in a welding manner comprises joining the heat dissipation component to the tank using a friction stir welding process.

[0032] In a possible embodiment of the second aspect, the step of fixedly positioning the heat dissipation component within the tank in a welding manner comprises welding the heat dissipation component to the tank using a laser welding process.

[0033] In a possible embodiment of the second aspect, the step of fixedly positioning the heat dissipation component within the tank in a welding manner comprises welding the heat dissipation component to the tank using a brazing process.

[0034] In a possible implementation of the second aspect, the radiator further includes a fastener, and after the step of forming the heat dissipation component, the method further includes the step of forming fastening holes in the heat dissipation component, and the step of forming a tank and disposing the heat dissipation component in the tank includes the steps of forming a tank and forming fastening holes in the tank; and fixedly disposing the heat dissipation component in the tank by cooperation between the fastener and the fastening holes.

[0035] In this way, the tank and the heat dissipating component are fixedly connected by the cooperation between the fastener and the fastening hole, which is easy to operate, has a mature process, and is relatively low in cost.

[0036] In a possible implementation of the second aspect, after the heat dissipation component is fixedly positioned in the tank by cooperation between the fastener and the fastening hole, the method further includes a step of forming a sealing layer between an outer wall of the heat dissipation component and an inner wall of the tank.

[0037] The sealing layer can improve the tightness of the connection between the heat dissipation component and the tank and reduce the risk of air leakage.

[0038] In a possible implementation of the second aspect, the step of forming the tank and disposing the heat dissipation component within the tank includes the steps of: providing a die casting mold for the tank; disposing the heat dissipation component in the die casting mold and forming the tank by hot mount die casting, wherein the heat dissipation component is disposed within the tank.

[0039] In this way, when the tank is formed by the in-mold hot mounting method, the heat dissipation components can be placed inside the tank, which simplifies the work and reduces costs.

[0040] In a possible implementation of the second aspect, forming the heat dissipation component includes forming the heat dissipation component using a brazing process.

[0041] According to a third aspect, the present application provides a radiator, said radiator being obtained using the method previously described.

[0042] The heat dissipation component in the radiator obtained by using the above method is in contact with the heat source component, and the heat sink component includes a receiving cavity used to receive a cooling liquid, which may be a gas-liquid two-phase heat dissipation manner, which effectively improves the heat dissipation uniformity and further improves the heat dissipation effect of the radiator.

[0043] According to a fourth aspect, the present application provides a remote radio unit including at least a heat source component and a radiator as described above, wherein a heat dissipation component within the radiator is in contact with the heat source component.

[0044] The heat source component and the radiator are included. The heat dissipation component of the radiator is in contact with the heat source component, and the heat dissipation component includes a receiving cavity used for receiving a cooling liquid. The cooling liquid in the receiving cavity is vaporized and evaporated into the receiving cavity after absorbing the heat dissipated from the heat source component. When the vaporized and evaporated working liquid comes into contact with the inner wall of the receiving cavity (such as the top of the receiving cavity) which is relatively low temperature, it condenses and releases heat, and the condensed cooling liquid flows back to the bottom of the receiving cavity. By repeating the cycle in this way, uniform heat dissipation is realized, and a relatively high temperature equalization performance and a relatively good heat dissipation effect are realized. In this way, the heat dissipation capacity of the remote radio unit is improved. [Brief description of the drawings]

[0045] [Figure 1] FIG. 2 is a schematic diagram of a partially divided structure of a radiator according to an embodiment of the present application. [Diagram 2] 2 is a schematic cross-sectional view of a contact between a radiator and a heat source component according to an embodiment of the present application. [Diagram 3] 1 is a schematic diagram of a structure of a heat dissipation component in a radiator according to an embodiment of the present application; [Figure 4] 1 is a schematic cross-sectional view of a radiator according to an embodiment of the present application; [Diagram 5] 2 is a schematic cross-sectional view of another radiator according to an embodiment of the present application; [Figure 6] 1 is a schematic cross-sectional view of yet another radiator according to an embodiment of the present application; [Figure 7] 1 is a schematic cross-sectional view of yet another radiator according to an embodiment of the present application; [Figure 8] FIG. 2 is a schematic diagram of a radiator structure formed by friction stir welding between a heat dissipation component and a tank according to an embodiment of the present application. [Figure 9] FIG. 2 is a schematic diagram of a structure of a radiator formed by brazing a heat dissipation component and a tank according to one embodiment of the present application. [Figure 10]1 is a schematic diagram of a radiator arrangement formed between a heat dissipation component and a tank by cooperation between fasteners and fastening holes according to an embodiment of the present application; FIG. [Figure 11] 4 is a flowchart of a method for manufacturing a radiator according to an embodiment of the present application.

[0046] Explanation of symbols 10-radiator; 11-tank; 111-first opening; 112-second opening; 113-die casting layer; 12-heat dissipation component; 121-housing; 121a-bottom plate; 121b-top plate; 121c-heat dissipation fins; 122-accommodating cavity; 123-protrusion; 124-groove; 13-fastener; 20-heat source component. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0047] The terms used in the embodiments of the present application are used only to describe particular embodiments of the present application and are not intended to limit the present application.

[0048] As communication products such as remote radio units become increasingly highly integrated and consume more power, the requirements for the heat dissipation efficiency of the products are also becoming higher. Conventional heat source components generally use die-cast aluminum alloy radiators as the main heat dissipation means. Specifically, the die-cast aluminum alloy radiator includes a substrate, a plurality of heat sink fins are arranged parallel to one side of the substrate, a heat generating element of the remote radio unit is arranged on the board, and the other end of the radiator, which is related to the substrate and opposite to the heat sink fins, contacts the board, and the heat generated from the heat source is diffused from the board to the substrate and the heat sink fins in sequence. The heat dissipation is realized by heat exchange between both the substrate and the heat sink fins and the environment.

[0049] However, due to the relatively low thermal conductivity of the die-casting aluminum alloy, the effect of dissipating heat in the hot spot area from the substrate to the top of the heat sink fin (the end far from the substrate) is affected, and there is a relatively large temperature difference between the substrate part and the top of the heat sink fin, resulting in a relatively poor heat dissipation uniformity and a reduced heat dissipation effect of the heat source component.

[0050] In the prior art, there is also a solution to use a roll-press cooler to dissipate heat from the heat source component. Specifically, by using a roll-press cooler instead of die-cast fitting of the heat sink fin, the roll-press cooler is used to form the heat sink fin, and the roll-press cooler is used to achieve a good temperature equalization effect for heat dissipation between the root (the end close to the substrate) and the upper end of the heat sink fin. In this way, the heat dissipation effect of the radiator is improved.

[0051] However, the substrate that is in direct contact with the heat source is a die-cast aluminum alloy, and the substrate is limited by the thermal conductivity of the substrate material, and the uniformity of heat dissipation is relatively poor. Therefore, the heat dissipation effect of the radiator needs to be further improved.

[0052] In order to solve the above technical problems, an embodiment of the present application provides a radiator. A heat dissipation component is in contact with a heat source component of a remote wireless unit, and the heat dissipation component includes a receiving cavity used to receive a cooling liquid. The cooling liquid can be vaporized and evaporated after absorbing heat, and the vaporized cooling liquid can condense and release heat when it comes into contact with a relatively low-temperature object. In this way, a gas-liquid two-phase heat dissipation is formed in the heat dissipation component that is in direct contact with the heat source component, so that the heat dissipation uniformity is effectively improved, the temperature equalization performance of the radiator is improved, and the heat dissipation effect is improved. Hereinafter, the radiator and the manufacturing method of the radiator will be described using two embodiments.

[0053] EMBODIMENT 1 An embodiment of the present application provides a radiator 10 used for heat dissipation of a remote radio unit. Specifically, the remote radio unit includes a heat source component, which generates a large amount of heat during operation, for example, a PCB circuit board (Printed Circuit Board) having a high frequency function. The radiator 10 mainly dissipates heat to the heat source component. As shown in FIG. 1, the radiator 10 includes a tank 11 and a heat dissipation component 12 disposed in the tank 11. Specifically, the tank 11 has a housing cavity used to house the heat dissipation component 12, and the heat dissipation component 12 is disposed in the housing cavity. The heat dissipation component 12 and the tank 11 can be disposed by methods such as welding, joining, hot mounting, or screw connection.

[0054] The heat dissipation component 12 includes a housing 121, which includes a receiving cavity 122 for receiving a coolant. The coolant can be vaporized and evaporated after absorbing heat, and the vaporized coolant can be condensed and release heat when it comes into contact with a relatively low-temperature object. In this way, a gas-liquid two-phase heat dissipation method can be formed in the heat dissipation component 12. There is a first opening 111 on one side of the tank 11, and the heat dissipation component 12 is in contact with the heat source component 20 using the first opening 111. Specifically, one end of the heat dissipation component 12 can be embedded in the first opening 111, thereby bringing the radiator 10 into contact with the heat source component 20 to perform heat exchange.

[0055] As shown in FIG. 2, the heat dissipation component 12 is in contact with the heat source component 20, so that the side of the heat dissipation component 122 and the side closer to the heat source component 20 is the bottom of the receiving cavity 122, and the opposite side of the bottom is the top of the receiving cavity 122. After absorbing the heat released from the heat source component 20, the cooling liquid in the receiving cavity 122 is vaporized and evaporated into the receiving cavity 122, and the evaporated and vaporized working liquid condenses and releases heat when it comes into contact with the inner wall of the receiving cavity 122 (such as the top of the receiving cavity 122) which is relatively low temperature, and the condensed cooling liquid flows back to the bottom of the receiving cavity 122. By repeating this cycle, uniform heat dissipation is realized. Compared with the existing die-cast aluminum alloy radiator, the heat dissipation component 12 is in direct contact with the heat source, and a gas-liquid two-phase heat dissipation can be formed in the heat dissipation component 12, so that a relatively high temperature equalization performance is achieved. Therefore, the heat dissipation effect of the radiator 10 is effectively improved.

[0056] In addition, compared with the die-cast aluminum heat sink fins used in existing radiators, the gas-liquid two-phase heat dissipation method formed in the heat dissipation component 12 can greatly improve the temperature equalization and heat dissipation performance of the radiator, and can also greatly reduce the thermal resistance of the heat transfer path, thereby improving the heat dissipation effect of the radiator 10.

[0057] As shown in FIG. 1, there is further a second opening 112 on a side relative to the tank 11 and opposite to the first opening 111, and the heat dissipation component 12 is positioned within the tank 11 using the second opening 112, which is used to position the heat dissipation component 12 within the tank 11 and can also facilitate fixed positioning of the tank 11 and the heat dissipation component 12.

[0058] As shown in Fig. 1, the shape of the tank may be a rectangular parallelepiped shape. There is a first opening 111 connected to the receiving cavity on the side of the tank 11, and there is a second opening 112 on the side opposite to the first opening 111, and openings can also be arranged on one or more sides between the first opening 111 and the second opening 112 to increase the contact between the heat dissipation component and the external environment, so that the heat of the heat dissipation component can be better dissipated, which is helpful to improve the heat dissipation effect of the radiator.

[0059] The tank 11 may be formed using a die-cast aluminum alloy material. It will be understood that the shape of the tank 11 may alternatively be other shapes such as a cube or a circle. The material forming the heat dissipation component 12 may be a metal with a relatively high thermal conductivity such as aluminum or copper, and alloy materials thereof.

[0060] See Fig. 3. In a possible embodiment, the housing 121 of the heat dissipation component 12 may include a bottom plate 121a, a top plate 121b, and a heat dissipation fin 121c located between the bottom plate 121a and the top plate 121b. The bottom plate 121a of the heat dissipation component 12 is in contact with the heat source component 20 using the first opening 111 and may have a relatively large contact area, which is helpful to improve the heat dissipation effect.

[0061] The bottom plate 121a, the top plate 121b, and the heat dissipation fins 121c are all hollow structures, and the hollow structures of the bottom plate 121a, the heat dissipation fins 121c, and the top plate 121b are connected to form the accommodating cavity 122. Specifically, for example, the bottom plate 121a has a first cavity, the top plate 121b has a second cavity, and the heat dissipation fins 121c have a third cavity, one end of the third cavity is connected to the first cavity, and the other end of the third cavity is connected to the second cavity, and the connected first cavity, second cavity, and third cavity form the accommodating cavity 122. The cooling liquid is injected into the accommodating cavity 122.

[0062] There may be multiple heat sink fins 121c, and the multiple heat sink fins 121c may be arranged in parallel at equal intervals. The multiple heat sink fins 121c can provide more storage space and further increase the contact area for evaporation or condensation, so that the heat dissipation effect is further improved.

[0063] In this embodiment of the present application, the first end of the heat dissipation component 12 and close to the first opening 111 is fixedly connected to the tank 11. Specifically, in this embodiment of the present application, the bottom plate 121a is the first end of the heat dissipation component 12 and close to the first opening 111. In other words, the bottom plate 121a is fixedly connected to the tank 11. The outer wall of the first end and in contact with the inner wall of the tank 11 has a protrusion 123 and / or a groove 124. Specifically, as shown in FIG. 1, the tank 11 and the heat dissipation component 12 may each be in the shape of a rectangular parallelepiped. The tank 11 has a receiving cavity, and the heat dissipation component 12 is disposed in the receiving cavity. There is a first opening 111 on one side of the tank 11, and the bottom plate 121a of the heat dissipation component 12 is in contact with the heat source component 20 using the first opening 111. On the side relative to the tank 11 and opposite the first opening 111 there is a second opening, and the heat dissipation component 12 can be placed in the tank 11 using the second opening 112.

[0064] The bottom plate 121a is fixedly connected to the tank 11, and the outer wall of the bottom plate 121a that is related to the bottom plate 121a and in contact with the tank 11 has a protrusion 123 and / or a groove 124. Specifically, the outer wall of the bottom plate 121a may have a protrusion 123. As shown in Figures 4, 5, and 6, the outer wall of the bottom plate 121a has a protrusion 123 formed outward. Alternatively, the outer wall of the bottom plate 121a may have a groove 124. As shown in Figure 7, the outer wall of the bottom plate 121a has a groove 124 formed inward. Alternatively, the outer wall of the bottom plate 121a may have both the protrusion 123 and the groove 124.

[0065] A protrusion 123 and / or a groove 124 may be formed on the outer wall. As shown in Fig. 6, the outer wall has a protrusion 123, and the cross section of the outer wall of the bottom plate 121a has an arch structure. As shown in Fig. 7, the outer wall has a groove 124, and the cross section of the outer wall of the bottom plate 121a has a sawtooth structure. Alternatively, multiple protrusions 123 and / or grooves 124 may be formed on the outer wall to further enhance the robustness of the connection between the tank 11 and the heat dissipation component 12.

[0066] In a possible embodiment, the protrusion 123 and / or the groove 124 are located at an end of the tank 11 that is related to the heat dissipation component 12 and is close to the bottom of the tank 11. Specifically, as shown in Fig. 4, the bottom of the tank 11 is the end of the tank 11 that is close to the bottom of the receiving cavity 122, and the top of the tank 11 is the end opposite the bottom. The protrusion 123 is located at an end of the tank 11 that is related to the bottom wall of the heat dissipation component 12 and is close to the bottom of the tank 11, and the cross section of the bottom plate 121a is an inverted T-shape as shown in Fig. 4.

[0067] Alternatively, as shown in FIG. 5, the protrusions 123 and / or grooves 124 are disposed at the ends that are related to the heat dissipation component 12 and are away from the bottom of the tank 11, so that the cross section of the bottom plate 121a is T-shaped as shown in FIG. 5. Similarly, the robustness of the connection between the tank 11 and the heat dissipation component 12 can be improved by disposing the protrusions 123 and / or grooves 124, so that the cross section of the bottom plate 121a is T-shaped or inverted T-shaped. In addition to improving the robustness of the connection, the complexity of the heat dissipation component 12 is reduced, making it easier to form the heat dissipation component 12. Also, when the heat dissipation component 12 and the tank 11 are fixedly connected by friction stir welding, the cross section of the bottom plate 121a is T-shaped or inverted T-shaped, making it easier to place and work on the stir bar.

[0068] In a possible embodiment, the heat dissipation component 12 can be fixed in the tank 11 by a welding method. The welding method can specifically include at least one of friction stir welding, brazing, and laser welding. Compared with a method of fastening using screws, the heat dissipation component 12 can be fixed in the tank 11 by a welding method to improve the integrity of the radiator 10 and reduce the risk of air leakage from the heat dissipation component 12.

[0069] Specifically, as shown in Fig. 8, the heat dissipation component 12 is fixed to the tank 11 by friction stir welding. As shown in Fig. 8, a bottom plate 121a is welded to the tank 11, the tank 11 has a first opening 111, the bottom plate 121a is embedded in the first opening 111, and the first opening 111 can be used to directly contact the heat source component 20.

[0070] When the heat dissipation component 12 is fixed to the tank 11 by the brazing method, as shown in FIG. 9, when the bottom plate 121a is connected to the tank 11 by the brazing method, the first opening 111 of the tank may be coated with a die-casting layer 113 to facilitate the brazing connection between the tank 11 and the bottom plate 121a, and the bottom plate 121a is welded to the die-casting layer 113 by the brazing method. This can be easily implemented. However, the heat dissipation component 12 contacts the heat source component 20 using the die-casting layer 113 on the first opening 111, and the thickness of the die-casting layer 113 is much smaller than the thickness of the tank 11, so the heat loss is relatively small. Compared with methods such as friction stir welding, the heat dissipation effect is reduced. However, compared with the existing case in which the substrate contacts the heat source, the thickness of the die-casting layer 113 is relatively small, so the thermal resistance of the heat transfer path can be reduced and the heat dissipation effect can be improved.

[0071] In another possible embodiment, as shown in FIG. 10, the radiator 10 further includes a fastener 13, and fastening holes (not shown) that cooperate with the fastener 13 are provided in the heat dissipation component 12 and the tank 11, and the heat dissipation component 12 is fixedly positioned within the tank 11 by cooperation between the fastener 13 and the fastening holes.

[0072] Specifically, for example, there may be a first fastening hole in the tank 11, and a second fastening hole in the bottom plate 121a of the heat dissipation component 12. The fastener 13 may be a mechanical part having a thread such as a screw on the outer wall, and the second fastening hole may be a hole having a thread on the inner wall, and the fastener 13 passes through the first fastening hole of the tank 11 and cooperates with the second fastening hole of the heat dissipation component 12 through the screw, so that the heat dissipation component 12 is fixedly disposed in the tank 11. When the heat dissipation component 12 and the tank 11 are fixed in a manner in which the fastener 13 cooperates with the fastening hole, the solution is simple, the process is mature, the implementation is simple, and the cost is relatively low.

[0073] When the heat dissipation component 12 and the tank 11 are fixedly connected in a manner in which the fastener 13 cooperates with the fastening hole, the heat dissipation component 12 may have relatively poor airtightness due to the fastening hole provided in the heat dissipation component 12. Therefore, in this embodiment of the present application, the radiator 10 may further include a sealing layer (not shown), which is disposed between the outer wall of the heat dissipation component 12 and the inner wall of the tank 11. Specifically, the sealing layer may be a resin layer. The provision of the sealing layer can improve the airtightness of the connection between the heat dissipation component 12 and the tank 11 and reduce the risk of air leakage.

[0074] The sealing layer may be disposed only between the bottom plate 121a and the tank 11, or the sealing layer may be disposed at a location where the heat dissipation component 12 contacts the tank 11, for example between the top plate 121b of the heat dissipation component 12 and the tank 11.

[0075] In another possible embodiment, the heat dissipation component 12 is fixedly disposed in the tank 11 by an in-mold hot mounting method. Specifically, the heat dissipation component 12 can be disposed in the tank 11 when molding the tank 11 using a mold, and in the case where the heat dissipation component 12 is disposed in the tank 11 when molding the tank 11, the process can be simplified and the cost can be reduced.

[0076] 8, the formed tank 11 has a first opening 111, and the bottom wall of the heat dissipation component 12 is embedded in the first opening 111 and contacts the heat source component 20 using the first opening 111. It should be noted that the radiator 10 is fixedly connected to the tank 11 by an in-mold hot mounting manner, and the second opening 112 can still be positioned on the tank 11, so that it is convenient to inject the coolant into the radiator 10.

[0077] EMBODIMENT 2 An embodiment of the present application provides a method for manufacturing a radiator. The radiator is used for heat dissipation of a remote radio unit. As shown in Figure 11, the method includes the following steps:

[0078] S101: Form a heat dissipation component, where the heat dissipation component includes a housing, the housing including a receiving cavity.

[0079] The heat dissipating component may be formed using a brazing process, and the material from which the heat dissipating component is formed may be a metal with relatively good thermal conductivity, such as aluminum or copper, or an alloy thereof.

[0080] The cooling liquid may be a liquid with a high latent heat of vaporization, such as a single substance, such as water, methanol, or acetone, or a mixture of these refrigerant liquids.

[0081] In S101, when forming the heat dissipation component, it is necessary to provide a liquid inlet on the housing, which is connected to the receiving cavity, to facilitate the injection of the cooling liquid.

[0082] S102: Form a tank and place a heat dissipation component in the tank, where the heat dissipation component contacts a heat source component of a remote wireless unit using a first opening on one side of the tank.

[0083] The tank may be formed separately, and the cooling liquid may be injected into the heat dissipating component, which may then be placed into the tank, or alternatively, the tank may be formed with the heat dissipating component placed into the tank together, and the cooling liquid may be injected into the heat dissipating component.

[0084] In the radiator formed using the above steps, the heat dissipation component is in contact with the heat source component, and the heat dissipation component includes a receiving cavity used for receiving a cooling liquid. The cooling liquid in the receiving cavity is vaporized and evaporated into the receiving cavity after absorbing the heat dissipated from the heat source component. When the vaporized and evaporated working liquid comes into contact with the inner wall of the receiving cavity (such as the top of the receiving cavity) which is relatively low temperature, it condenses and releases heat, and the condensed cooling liquid flows back to the bottom of the receiving cavity. By repeating this cycle, uniform heat dissipation is realized. Since a relatively high temperature equalization performance is achieved, the heat dissipation effect of the radiator is effectively improved.

[0085] In a possible embodiment, step S102 includes: molding the tank, i.e., separately molding the tank by die casting; and fixing the heat dissipation component in the tank by welding.

[0086] In this way, the heat dissipation component is placed in the tank by a welding method, specifically, the bottom plate of the heat dissipation component can be welded to the tank, which improves the integrity of the radiator and reduces the risk of air leakage of the heat dissipation component.

[0087] In particular, the step of fixedly disposing the heat dissipation component within the tank in a welding manner may include joining the heat dissipation component to the tank using a friction stir welding process.

[0088] Alternatively, fixedly disposing the heat dissipation component within the tank in a welded manner may include welding the heat dissipation component to the tank using a laser welding process.

[0089] Alternatively, the step of fixedly disposing the heat dissipation component within the tank in a welding manner includes welding the heat dissipation component to the tank using a brazing process.

[0090] In another possible embodiment, the radiator further includes a fastener. After forming the heat dissipation component in step S101, the method may further include forming a fastening hole (i.e., a second fastening hole) in the heat dissipation component.

[0091] Step S102 may include forming a tank and forming a fastening hole (i.e., a first fastening hole) in the tank; and fixedly positioning the heat dissipation component in the tank through cooperation between a fastener and the fastening hole.

[0092] Specifically, the fastener passes through a first fastening hole of the tank and cooperates with a second fastening hole of the bottom plate of the heat dissipation component to fixedly connect the tank and the heat dissipation component using the fastener and the fastening hole. The connection method in which the fastener cooperates with the fastening hole is simple, the process is mature, and the cost is relatively low.

[0093] In order to improve the airtightness of the heat dissipation component, after the step of fixing and disposing the heat dissipation component in the tank by the cooperation between the fastener and the fastening hole, the method further includes the step of forming a sealing layer between the outer wall of the heat dissipation component and the inner wall of the tank. The sealing layer may be formed by coating a sealing material between the outer wall of the heat dissipation component and the inner wall of the tank, for example, the sealing layer may be a resin layer. Alternatively, the sealing layer may be a mechanical part having a sealing function, such as a sealing strip, which is disposed between the outer wall of the heat dissipation component and the inner wall of the tank.

[0094] In another possible embodiment, step S102 may include the steps of: preparing a die-casting mold for the tank; disposing a heat-dissipating component in the die-casting mold, and forming the tank by a hot-mount die-casting manner, where the heat-dissipating component is disposed in the tank. In this way, when forming the tank by an in-mold hot-mounting manner, the heat-dissipating component is disposed in the tank, so that the operation can be simplified and the cost can be reduced.

[0095] An embodiment of the present application further provides a remote radio unit including at least a heat source component and the radiator of any of embodiments 1 and 2. A heat dissipation component in the radiator is in contact with the heat source component. The heat source component is a heat generating component in the remote radio unit, such as a PCB circuit board.

[0096] According to the remote radio unit provided in this embodiment of the present application, a heat source component and a radiator are included, the heat dissipation component of the radiator is in contact with the heat source component, and the heat dissipation component includes a receiving cavity used to receive a cooling liquid. The cooling liquid in the receiving cavity is vaporized and evaporated into the receiving cavity after absorbing the heat dissipated from the heat source component. When the vaporized and evaporated working liquid comes into contact with the inner wall of the receiving cavity (such as the top of the receiving cavity) which is relatively low temperature, it condenses and releases heat, and the condensed cooling liquid flows back to the bottom of the receiving cavity. By repeating the cycle in this way, uniform heat dissipation is realized, and a relatively high temperature equalization performance and a relatively good heat dissipation effect are realized. In this way, the heat dissipation capacity of the remote radio unit is improved.

[0097] In the description of the embodiments of the present application, it should be noted that the terms "attach", "connect" and "connection" should be understood in a broad sense unless otherwise specified and limited. For example, a connection may be a fixed connection, a connection realized using an intermediate medium, or a connection between two elements or an interactive relationship between two elements. Those skilled in the art can understand the specific meaning of the aforementioned terms in the embodiments of the present application based on the specific situation.

[0098] In the description of the embodiments of this application, the claims, and the accompanying drawings, the terms "first," "second," "third," "fourth," etc. (when present) are intended to distinguish between similar objects, but do not necessarily indicate a particular order or sequence.

Claims

1. A radiator for use in dissipating heat from a remote radio unit, the radiator including a tank and a heat dissipation component disposed within the tank, the heat dissipation component includes a housing having a receiving cavity for receiving a cooling fluid, the housing having a first opening on one side of the tank, the heat dissipation component contacting a heat source component of the remote radio unit using the first opening; a second opening on a side of the tank opposite the first opening, the heat dissipation component being disposed in the tank through the second opening in a direction from the second opening to the first opening. Radiator.

2. 2. The radiator of claim 1, wherein a first end related to the heat dissipation component and close to the first opening is fixedly connected to the tank, and an outer wall related to the first end and in contact with an inner wall of the tank has protrusions and / or grooves.

3. 3. The radiator of claim 2, wherein the protrusions and / or the grooves are disposed at an end of the tank that is relative to the heat dissipation component and is closer to a bottom, or the protrusions and / or the grooves are disposed at an end of the tank that is relative to the heat dissipation component and is further away from the bottom.

4. The heat dissipation component is fixed in the tank by welding; 4. The radiator according to claim 1, wherein the welding method includes at least one of friction stir welding, brazing, and laser welding.

5. 4. The radiator of claim 1, further comprising a fastener, the heat dissipation component and the tank being provided with fastening holes cooperating with the fastener, the heat dissipation component being fixedly positioned within the tank by cooperation between the fastener and the fastening holes.

6. The radiator of claim 5 , further comprising a sealing layer, the sealing layer being disposed between an outer wall of the heat dissipation component and an inner wall of the tank.

7. 4. The radiator according to claim 1, wherein the heat dissipation component is fixedly arranged in the tank by in-mold hot mounting.

8. 8. The radiator of claim 1, wherein the housing includes a bottom plate, a top plate, and a plurality of heat sink fins disposed between the bottom plate and the top plate, the bottom plate, the top plate, and the heat sink fins are all hollow structures, and the hollow structures of the bottom plate, the heat sink fins, and the top plate are connected to form the accommodating cavity.

9. 1. A method for manufacturing a radiator, the radiator being used to dissipate heat in a remote radio unit, the method comprising: forming a heat dissipation component, the heat dissipation component including a housing, the housing including a containment cavity adapted to contain a cooling fluid; forming a tank and disposing the heat dissipation component in the tank, the heat dissipation component contacting a heat source component of the remote radio unit using a first opening on one side of the tank; The step of disposing the heat dissipation component within the tank includes: disposing the heat dissipation component in the tank through a second opening in a direction from the second opening on a side of the tank opposite the first opening toward the first opening; A method for manufacturing a radiator.

10. The steps of forming the tank and disposing the heat dissipation component within the tank include: forming the tank; and fixing the heat dissipation component in the tank by welding.

11. The step of fixing the heat dissipation component in the tank by welding includes: The method of claim 10 including joining the heat dissipating component to the tank using a friction stir welding process.

12. The step of fixing the heat dissipation component in the tank by welding includes: The method of claim 10 including the step of welding the heat dissipating component to the tank using a laser welding process.

13. The step of fixing the heat dissipation component in the tank by welding includes: The method of claim 10 including the step of welding the heat dissipating component to the tank using a brazing process.

14. The radiator further includes a fastener. After the step of forming the heat dissipation component, the method further comprises: The method further includes forming a fastening hole in the heat dissipation component. The steps of forming a tank and disposing the heat dissipation component within the tank include: forming the tank and forming the fastening holes in the tank; and fixing the heat dissipation component within the tank through cooperation between the fastener and the fastener hole.

15. After the step of fixedly positioning the heat dissipation component within the tank through cooperation between the fastener and the fastening hole, the method further comprises: The method for manufacturing a radiator according to claim 14, further comprising forming a sealing layer between an outer wall of the heat dissipation component and an inner wall of the tank.

16. The steps of forming a tank and disposing the heat dissipation component within the tank include: providing a die casting mold for the tank; 10. The method of claim 9, further comprising the steps of: placing the heat dissipation component in the die casting mold and forming the tank by a hot mount die casting process, the heat dissipation component being placed in the tank.

17. The step of forming a heat dissipation component includes:

17. A method of manufacturing a radiator according to any one of claims 9 to 16, comprising forming the heat dissipation component using a brazing process.

18. 18. A remote radio unit comprising at least a heat source component and a radiator according to any one of claims 1 to 17, wherein a heat dissipation component within the radiator is in contact with the heat source component.

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