Power amplifier assembly with liquid cooling heat dissipation mechanism

Abstract

The utility model discloses a power amplifier assembly with a liquid cooling heat dissipation mechanism, which belongs to the technical field of EMC electromagnetic compatibility, and is characterized in that the power amplifier assembly comprises two main water pipes and two groups of power amplifier assemblies, each of the two groups of power amplifier assemblies comprises a plurality of cold plate groups and power amplifier modules, the cold plate groups and the power amplifier modules are arranged up and down, and the power amplifier modules are installed on the surfaces of the cold plate groups. The main water pipes are communicated with each other, one main water pipe is provided with a water inlet, the other main water pipe is provided with a water outlet, the water inlet and the water outlet are connected with an external cold source machine, and each main water pipe is provided with a plurality of water distribution connectors. The heat dissipation device has the advantages that the heat dissipation requirement can also be met through the series-parallel connection design, and therefore the heat dissipation device can replace a forced air cooling heat dissipation mode to dissipate heat of the power amplifier module.

Description

TECHNICAL FIELD

[0001] The utility model belongs to EMC electromagnetic compatibility technical field, more specifically, it relates to a kind of power amplifier assembly with liquid cooling heat dissipation mechanism. BACKGROUND

[0002] In the EMC electromagnetic compatibility technical field, traditional power amplifier array is mostly forced air cooling heat dissipation mode.In the past longer period of time, this heat dissipation mode is with its relatively simple structure and lower cost, has been widely used in power amplifier array heat dissipation.However, with the continuous progress of science and technology, power amplifier chip technology has also made remarkable development.

[0003] Modern power amplifier chip has greatly improved in performance, and its signal processing capacity is stronger, correspondingly, the heat consumption generated when chip works also increases.At the same time, in order to meet the development trend of electronic product miniaturization, integration, the size of power amplifier chip is continuously reduced.This increase and decrease change makes the heat flux density of power amplifier chip increase sharply.Heat flux density is the heat power per unit area, which reflects the difficulty of chip heat dissipation.The greater the heat flux density, the more heat needs to be dissipated in the limited chip surface area, so that forced air cooling heat dissipation mode has many limitations:

[0004] 1, affected by system resistance, the actual working air volume of fan is only 3-5 times of maximum air volume, which greatly reduces the heat dissipation efficiency.

[0005] 2, the noise generated when running, causes adverse effects on user experience.

[0006] 3, when coping with instantaneous thermal shock, forced air cooling mode is weak, and cannot effectively protect equipment.

[0007] 4, the service life of fan is limited, and its failure will affect the reliability of heat dissipation system, and further threaten the normal operation of power amplifier array.

[0008] Therefore, in order to solve the above technical problems, the present application provides a kind of power amplifier assembly with liquid cooling heat dissipation mechanism. UTILITY MODEL CONTENT

[0009] In view of the deficiencies in the prior art, the utility model aims at providing a kind of power amplifier assembly with liquid cooling heat dissipation mechanism.

[0010] To achieve the above objectives, this utility model provides the following technical solution: a power amplifier assembly with a liquid cooling heat dissipation mechanism, comprising two main water pipes and two sets of power amplifier assemblies. Each of the two sets of power amplifier assemblies includes multiple vertically arranged cold plate groups and power amplifier modules. The power amplifier modules are mounted on the surface of the cold plate groups. The main water pipes are interconnected. One main water pipe is provided with an inlet, and the other main water pipe is provided with an outlet. The inlet and outlet are connected to an external chiller. Each main water pipe is provided with multiple water distribution connectors, and the water distribution connectors are connected to the cold plate groups on the power amplifier assemblies through branch pipes.

[0011] Preferably, the branch pipe is a rubber hose, one end of which is threaded and connected to the branch connector of the main water pipe through a movable nut, and the other end is connected to the self-sealing water connector seat on the cold plate assembly through a self-sealing water connector.

[0012] Preferably, each main water pipe integrates a pressure sensor, a flow sensor, and a leakage detection device, and the signal output terminals of the three are connected to the signal input terminals of the host computer.

[0013] Preferably, the water inlet is connected to a self-sealing water connector seat on an external chiller via a self-sealing water connector.

[0014] Preferably, the main water pipe with an inlet includes a U-shaped pipe A and a U-shaped pipe B. The horizontal part of the U-shaped pipe A is connected to the inlet, and the vertical part of the U-shaped pipe A is connected to the water inlet of the cold plate assembly on the first power amplifier assembly. The U-shaped pipe B has an inverted structure, and the vertical part of the U-shaped pipe B is connected to the water outlet of the cold plate assembly on the first power amplifier assembly. The main water pipe with an outlet includes a U-shaped pipe C and a U-shaped pipe D. The U-shaped pipe C has an inverted structure, and the vertical part of the U-shaped pipe C is connected to the water inlet of the cold plate assembly on the second power amplifier assembly. The vertical part of the U-shaped pipe D is connected to the water outlet of the cold plate assembly on the second power amplifier assembly, and the horizontal part of the U-shaped pipe D is connected to the outlet. The U-shaped pipes B and C are connected by a connecting pipe.

[0015] Preferably, each group of cold plates includes a cold plate A and a cold plate B. The water inlets of the cold plates A and B on the first group of power amplifier components are respectively connected to the two vertical parts of the U-shaped tube A through water distribution connectors. The outlets of the cold plates A and B on the first group of power amplifier components are respectively connected to the two vertical parts of the U-shaped tube B through water distribution connectors. The water inlets of the cold plates A and B on the second group of power amplifier components are respectively connected to the two vertical parts of the U-shaped tube C through water distribution connectors. The outlets of the cold plates A and B on the second group of power amplifier components are respectively connected to the two vertical parts of the U-shaped tube C through water distribution connectors.

[0016] Preferably, a thermally conductive interface material is applied between the power amplifier module and the cold plate assembly, and the power amplifier module is fastened to the cold plate assembly with screws.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This utility model utilizes an external chiller to provide suitable flow rate and pressure, driving deionized water, the heat dissipation medium, into the first main water pipe through a self-sealing connector at the inlet. The water then flows into 16 branch pipes, which distribute the flow to the cold plate assembly of the first power amplifier module, carrying away the heat generated by the power amplifier module. The working fluid then exits from the 16 cold plate assemblies and converges back into the first main water pipe, entering the next main water pipe, and subsequently into the next group of 16 power amplifier modules. After being distributed into 16 branches again, the water finally converges at the self-sealing connector at the outlet, returning to the chiller, completing the cycle. During this process, the water temperature gradually rises as it absorbs heat. When the water temperature reaches a certain level, the compressor is activated to cool the water and lower the temperature, ensuring effective heat dissipation. This replaces forced air cooling for power amplifier module heat dissipation, thus solving the problems mentioned in the background technology.

[0019] 2. The main water pipe of this utility model is made of 304 food-grade stainless steel and is formed by argon gas protection welding. This welding method can ensure the welding quality and prevent the oxidation of materials and the mixing of impurities during the welding process.

[0020] 3. The branch pipe of this utility model is a rubber hose, which connects the main water pipe and the power amplifier component. Due to its flexible connection characteristics, it has stronger tolerance and does not have particularly high requirements for the positional accuracy of the power amplifier component. Compared with some blind-insertion power amplifier component designs, this flexible connection method has lower processing requirements for related structural components, lower processing costs, and stronger operability during installation, making it easier to connect the main water pipe and the power amplifier component.

[0021] 4. A thin layer of thermally conductive interface material is evenly applied between the power amplifier module and the cold plate assembly. Then, the power amplifier module is fastened to the cold plate assembly with screws. On the one hand, the screws can play a mechanical holding role. On the other hand, the thermally conductive interface material can effectively reduce the thermal resistance of conduction, so that the heat generated by the power amplifier module can be transferred to the cold plate assembly more efficiently.

[0022] 5. The main water pipe of this utility model integrates a pressure sensor, a flow sensor, and a leakage detection device. All of them have feedback functions and can transmit information to the host computer, where relevant information can be read in real time to understand the working status of the whole machine. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention (in the figure, the irregularly shaped ones are cold plate assemblies, the rectangular ones are power amplifier modules, and the power amplifier modules are attached to both the upper and lower surfaces of the cold plate assemblies).

[0025] Figure 2 This is a flowchart illustrating the workflow of this utility model.

[0026] Figure 3 This is a schematic diagram of the specific structure of the pipe in this utility model;

[0027] Figure 4 This is a schematic diagram of the specific structure of the main water pipe in this utility model;

[0028] Figure 5 This is a schematic diagram showing the flow direction of the working fluid in this invention.

[0029] In the diagram: 1. Main water pipe; 101. U-shaped pipe A; 102. U-shaped pipe B; 103. U-shaped pipe C; 104. U-shaped pipe D; 2. Water inlet; 3. Water outlet; 4. Water distribution connector; 5. Branch pipe; 6. Power amplifier assembly; 601. Cold plate assembly; 6011. Cold plate A; 6012. Cold plate B; 602. Power amplifier module. Detailed Implementation

[0030] like Figures 1-5 As shown, this utility model provides a power amplifier assembly with a liquid cooling heat dissipation mechanism, including two main water pipes 1 and two sets of power amplifier assemblies 6. Each set of power amplifier assemblies 6 includes multiple vertically arranged cold plate groups 601 and power amplifier modules 602. The power amplifier modules 602 are mounted on the surface of the cold plate groups 601. The main water pipes 1 are interconnected. One main water pipe 1 is provided with an inlet 2, and the other main water pipe 1 is provided with an outlet 3. The inlet 2 and outlet 3 are connected to an external chiller. Each main water pipe 1 is provided with multiple water distribution connectors 4, and the water distribution connectors 4 are connected to the cold plate groups 601 on the power amplifier assembly 6 through branch pipes 5. The inlet 2 is connected to the self-sealing water connector seat on the external chiller through a self-sealing water connector. The main water pipes 1 are designed as separate parts, and each part is connected with a standard flange, which facilitates assembly and use in different installation environments. For example, in some equipment layouts with limited space or complex structures, each component can be placed in a suitable position first, and then connected by flanges, which is much more flexible than using a single long pipe for installation.

[0031] In operation, an external chiller provides a suitable flow rate and pressure, driving deionized water, the heat dissipation medium, into the first main water pipe through the self-sealing connector at the inlet. It then flows into the 16-channel branch pipe 5, which in turn branches into the cold plate group 601 of the first power amplifier assembly 6 (the process of entering the main water pipe first and then flowing into the 16-channel branch pipe 5 involves both convergence and branching, demonstrating a combination of series and parallel connections). This removes the heat generated by the power amplifier assembly 6 (i.e., the heat generated by the power amplifier module 602). The working fluid then exits from the 16 cold plate groups 601 and converges back into the first main water pipe 1, entering the next main water pipe, and subsequently into the next group of 16-channel power amplifier assemblies 6. After being branched into 16 channels again, it finally converges back into the self-sealing water connector at the outlet 3 (again, there is both convergence and branching, demonstrating a combination of series and parallel connections) and returns to the chiller, completing the cycle. During this process, the water temperature gradually rises as it absorbs heat. When the water temperature reaches a certain level, the compressor is activated to cool the water and ensure effective heat dissipation.

[0032] The first power amplifier assembly 6 is the low-end power amplifier assembly 6, and the second power amplifier assembly 6 is the high-end power amplifier assembly.

[0033] In summary, the water circuit design of this liquid cooling system adopts a series-parallel connection (a combination of series and parallel connections). A simple series connection would result in excessive water flow resistance, while a simple parallel connection would require the chiller to provide a large flow rate. Since the water flow rate provided by the chiller in this power amplifier array liquid cooling system is limited, if all connections are in parallel, the total flow rate would be divided so that the flow rate of each channel would not be sufficient to heat dissipate the individual power amplifier component 6. As mentioned above, this power amplifier array has 16 low-frequency power amplifier components 6 and 16 high-frequency power amplifier components 6, which generally operate in a time-sharing manner. The series-parallel water circuit design can take advantage of this characteristic to reasonably combine the low-frequency and high-frequency power amplifier components 6 in series and parallel connections respectively. When the 16-channel low-end power amplifier assembly 6 is working, the working fluid can flow through the corresponding cold plate group 601 of these low-end power amplifier assemblies 6 in a series-parallel connection. At this time, the flow distribution can meet their heat dissipation requirements. When the 16-channel high-end power amplifier assembly 6 is working, the water flows through the corresponding cold plate group 601 of the high-end power amplifier assembly 6 in a different series-parallel connection. This can also meet the heat dissipation requirements and avoid waste of resources (more rational flow distribution).

[0034] Furthermore, one end of the branch pipe 5 is threaded and connected to the water distribution joint 4 of the main water pipe 1 via a movable nut, and the other end is connected to the self-sealing water connector seat on the cold plate assembly 601 via a self-sealing water connector.

[0035] It should be noted that, as mentioned earlier, the self-sealing water connector and its seat each have a sealing function when separated, effectively preventing the working fluid from flowing out. When the self-sealing water connector and its seat are screwed together to a certain depth, a locking function is created, preventing them from separating. At this point, the spring inside the connector is pushed open, opening the internal channel and allowing the working fluid to pass through smoothly. This design ensures both the reliability of the connection and the sealing and conductivity of the water circuit.

[0036] The main water pipe 1 is made of 304 food-grade stainless steel and is formed by argon-protected welding. This welding method ensures welding quality and prevents oxidation of materials and contamination of impurities during the welding process. After welding, the main water pipe 1 undergoes pickling and passivation sealing treatment, forming a dense protective film on its surface, which allows for long-term use and improves the corrosion resistance and service life of the main water pipe 1.

[0037] Branch pipe 5 is a rubber hose, which connects the main water pipe 1 and the power amplifier assembly 6. Due to its flexible connection characteristics, it has stronger tolerance and does not have particularly high requirements for the positional accuracy of the power amplifier assembly 6. Compared with some blind-insertion power amplifier assembly 6 designs, this flexible connection method has lower processing requirements for related structural components, lower processing costs, and stronger operability during installation, making it easier to connect the main water pipe 1 and the power amplifier assembly 6.

[0038] The main water pipe 1 integrates a pressure sensor, a flow sensor, and a leak detection device. The pressure sensor monitors pressure changes within the pipe in real time, the flow sensor accurately measures the flow rate of the working fluid, and the leak detection device detects any liquid leaks. These devices have feedback capabilities, transmitting the collected information to a host computer in real time. The host computer reads this information in real time to understand the overall system's operating status. For example, if the pressure sensor detects an abnormal pressure change, it may indicate a blockage or leak in the water circuit; if the flow sensor detects an abnormal flow rate, it may indicate an malfunction in the chiller or a problem with the piping; and if the leak detection device detects a leak, it can issue an alarm promptly, alerting engineers to perform repairs. This real-time monitoring and feedback mechanism effectively ensures the stable operation of the power amplifier array, improving the system's reliability and safety.

[0039] Furthermore, the main water pipe 1 on each power amplifier assembly 6 is formed by two U-shaped pipes connected together, and the water inlet 2 is located at the midpoint of the U-shaped pipe.

[0040] The specific structure is as follows: The main water pipe 1 with inlet 2 includes U-shaped pipe A101 and U-shaped pipe B102. The horizontal part of U-shaped pipe A101 is connected to inlet 2, and the vertical part of U-shaped pipe A101 is connected to the water inlet end of the cold plate assembly 601 on the first power amplifier assembly 6. U-shaped pipe B102 is inverted, and its vertical part is connected to the water outlet end of the cold plate assembly 601 on the first power amplifier assembly 6. The main water pipe 1 with outlet 3 includes U-shaped pipe C103 and U-shaped pipe D104. U-shaped pipe C103 is inverted, and its vertical part is connected to the water inlet end of the cold plate assembly 601 on the second power amplifier assembly 6. The vertical part of U-shaped pipe D104 is connected to the water outlet end of the cold plate assembly 601 on the second power amplifier assembly 6, and its horizontal part is connected to outlet 3. U-shaped tubes B102 and C103 are connected by a connecting pipe. Each cold plate group 601 includes a cold plate A6011 and a cold plate B6012. The water inlets of the cold plates A6011 and B6012 on the first power amplifier assembly 6 are connected to the two vertical parts of the U-shaped tube A101 through a water distribution connector 4. The outlets of the cold plates A6011 and B6012 on the first power amplifier assembly 6 are connected to the two vertical parts of the U-shaped tube B102 through a water distribution connector 4. The water inlets of the cold plates A6011 and B6012 on the second power amplifier assembly 6 are connected to the two vertical parts of the U-shaped tube C103 through a water distribution connector 4. The outlets of the cold plates A6011 and B6012 on the second power amplifier assembly 6 are connected to the two vertical parts of the U-shaped tube C103 through a water distribution connector 4.

[0041] 1. Structurally, in a centralized power amplifier assembly containing series and parallel water channels, this arrangement is more compact, the pipes can be staggered, and all pipes are arranged in one plane without overlapping in the depth direction.

[0042] 2. Functionally, such as Figure 5As shown, the working fluid in the cold source enters the U-shaped pipe A101 through inlet 2 and then flows into pipes A / B. The reason why inlet 2 is placed at the midpoint of the U-shaped pipe is to ensure that the flow rate entering pipes A / B is consistent. Then, from pipes A / B, the fluid flows through branch pipes 5 into the 16-channel power amplifier assembly 6, ensuring that the flow rate in each power amplifier assembly 6 is consistent. This ensures that the heat dissipation capacity of each cold plate assembly 601 is consistent, which in turn leads to a consistent final terminal temperature of the chips in the power amplifier module 602. Temperature consistency of the chips in power amplifier module 602 is a key design consideration, as inconsistent chip temperatures significantly impact performance. The working fluid then flows from the 16 cold plate groups 601 into the C / D tube (U-shaped tube B102), converges to E, and enters the next power amplifier assembly 6. It is then split into the F / G tube (U-shaped tube C103) of the next power amplifier assembly 6. Similarly, it flows into the cold plate group 601 of the next power amplifier assembly 6, and then from the cold plate group 601 into the H / I tube (U-shaped tube D104), finally converging at the outlet 3. This splitting of the flow from the midpoint of the U-shaped tube ensures consistent flow rate and consistent chip junction temperature.

[0043] A thin layer of thermally conductive interface material is evenly applied between the power amplifier module 602 and the cold plate assembly 601 (cold plate A6011 or cold plate B6012). The power amplifier module 602 is then fastened to the cold plate assembly 601 using screws. On one hand, the screws provide mechanical fastening, ensuring a secure connection between the power amplifier module 602 and the cold plate assembly 601. On the other hand, applying the thermally conductive interface material effectively reduces thermal resistance, allowing the heat generated by the power amplifier module 602 to be transferred to the cold plate assembly 601 more efficiently. The cold plate assembly 601 acts as a carrier of the working fluid. The heat from the power amplifier module 602 is first transferred to the substrate of the cold plate assembly 601, and then carried away by the flowing working fluid (deionized water), dissipating to the external heat sink through a heat exchanger, thereby achieving heat dissipation for the power amplifier assembly 6.

[0044] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A power amplifier assembly with liquid cooling mechanism, characterized in that: Including two main water pipes (1) and two groups of power amplifier components (6), the two groups of power amplifier components (6) each include a plurality of upper and lower cold plate groups (601) and power amplifier modules (602), the power amplifier module (602) is installed on the surface of the cold plate group (601), the main water pipe (1) is communicated with each other, one of the main water pipes (1) is provided with a water inlet (2), the other main water pipe (1) is provided with a water outlet (3), the water inlet (2) and the water outlet (3) part are connected with external cold source machine, the main water pipe (1) is provided with a plurality of water distribution connectors (4), and the water distribution connector (4) is connected with the cold plate group (601) on the power amplifier component (6) through the branch pipe (5).

2. The power amplifier assembly with liquid cooling heat dissipation mechanism according to claim 1, characterized in that: The branch pipe (5) is a rubber hose, one end is provided with a thread and is connected with the water distribution connector (4) of the main water pipe (1) through a movable nut, and the other end is connected with the self-sealing water connector seat on the cold plate group (601) through a self-sealing water connector.

3. The power amplifier assembly with liquid cooling heat dissipation mechanism according to claim 1, characterized in that: The main water pipe (1) is integrated with a pressure sensor, a flow sensor and a liquid leakage detection device, and the signal output ends of the three are connected with the signal input ends of the upper computer.

4. The power amplifier assembly with liquid cooling heat dissipation mechanism according to claim 1, characterized in that: The water inlet (2) is connected with the self-sealing water connector seat on the external cold source machine through a self-sealing water connector.

5. The power amplifier assembly with liquid cooling heat dissipation mechanism according to claim 1, characterized in that: The main water pipe (1) provided with the water inlet (2) includes a U-shaped pipe A (101) and a U-shaped pipe B (102), the horizontal part of the U-shaped pipe A (101) is connected with the water inlet (2), and the vertical part of the U-shaped pipe A (101) is connected with the water inlet end of the cold plate group (601) of the first group of power amplifier components (6); the U-shaped pipe B (102) is in an inverted structure, the vertical part of the U-shaped pipe B (102) is connected with the water outlet end of the cold plate group (601) of the first group of power amplifier components (6), the main water pipe (1) provided with the water outlet (3) includes a U-shaped pipe C (103) and a U-shaped pipe D (104), the U-shaped pipe C (103) is in an inverted structure, the vertical part of the U-shaped pipe C (103) is connected with the water inlet end of the cold plate group (601) of the second group of power amplifier components (6); the vertical part of the U-shaped pipe D (104) is connected with the water outlet end of the cold plate group (601) of the second group of power amplifier components (6), the horizontal part of the U-shaped pipe D (104) is connected with the water outlet (3), and the U-shaped pipe B (102) and the U-shaped pipe C (103) are communicated through a connecting pipe.

6. The power amplifier assembly with liquid cooling heat dissipation mechanism according to claim 5, characterized in that: Each of the cold plate groups (601) comprises a cold plate A (6011) and a cold plate B (6012), the water inlets of the cold plate A (6011) and the cold plate B (6012) on the first group of power amplifier assemblies (6) are connected to the two vertical parts of the U-shaped tube A (101) through water distribution joints (4), the water outlets of the cold plate A (6011) and the cold plate B (6012) on the first group of power amplifier assemblies (6) are connected to the two vertical parts of the U-shaped tube B (102) through water distribution joints (4), the water inlets of the cold plate A (6011) and the cold plate B (6012) on the second group of power amplifier assemblies (6) are connected to the two vertical parts of the U-shaped tube C (103) through water distribution joints (4), and the water outlets of the cold plate A (6011) and the cold plate B (6012) on the second group of power amplifier assemblies (6) are connected to the two vertical parts of the U-shaped tube C (103) through water distribution joints (4).

7. The power amplifier assembly with liquid cooling heat dissipation mechanism according to claim 1, characterized in that: The power amplifier module (602) and the cold plate group (601) are coated with a thermal interface material, and the power amplifier module (602) is fastened on the cold plate group (601) through screws.

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