Antenna liquid cooling heat dissipation frame structure and flow adjusting method

Abstract

The antenna liquid cooling heat dissipation frame structure comprises a frame body, mounting grooves, a cooling liquid inlet, a cooling liquid outlet, heat dissipation fins, an internal flow channel and a flow channel flow adjusting port, the frame body is of a hollow structure, a plurality of rows of groove sets are formed in the top face of the frame body, each groove set is composed of a plurality of mounting grooves, and the mounting grooves are communicated with the cooling liquid inlet and the cooling liquid outlet. The groove group is used for placing a power component; a plurality of internal flow channels are correspondingly arranged in the frame main body and below the groove group, a liquid inlet flow path and a liquid return flow path are arranged on the two axial sides of each internal flow channel, and the liquid inlet flow paths and the liquid return flow paths are semi-closed flow paths; radiating fins with different sizes are arranged at intervals along the axial direction of the internal flow channel; the cooling liquid inlet and the cooling liquid outlet are formed in the two sides of the bottom of the frame body respectively, and the heat dissipation performance of the frame body is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat dissipation structures, and in particular relates to an antenna liquid cooling heat dissipation frame structure and a flow regulation method. Background Art

[0002] For a long time, the heat dissipation problem of active phased array antennas has been the key to limiting the improvement of their detection performance. With the rapid development of modern active phased array antenna technology, active phased array antennas are showing a trend of diversified functions and complex tasks. Active phased array antennas contain a large number of heat-generating components, and the physical size of the antenna is very compact. Heat accumulates inside the antenna, causing the temperature to rise rapidly. In addition, the performance of the core electronic devices contained in the antenna is sensitive to temperature changes, and excessively high temperatures will directly affect its working performance. Therefore, it is very necessary to explore an efficient heat dissipation method for active phased array antennas.

[0003] The traditional method is air cooling, which generally consists of several cold plates of different lengths to form the antenna array. The coolant is distributed through the antenna collector and splitter, and then passes through the cold plate. At this time, the coolant exchanges heat with the internal heating components of the antenna to take away the generated heat. The coolant is collected and then flows out of the antenna. There are the following problems:

[0004] 1) The cold plates are of different lengths, flow resistance matching is difficult, and flow uniformity is poor;

[0005] 2) There are many sealing interfaces, which may cause leakage;

[0006] 3) There are installation errors, which affect the antenna performance. Summary of the invention

[0007] In view of this, the antenna liquid-cooled heat dissipation frame structure of the present invention changes the existing split structure into an integral structure, thereby improving the performance of use, solving the risk of leakage, and improving the installation accuracy. At the same time, it realizes the required flow distribution on multiple parallel flow channels, thereby enhancing the heat dissipation performance.

[0008] An antenna liquid cooling heat dissipation frame structure, the antenna includes an active phased array, including a frame body, a mounting slot, a coolant inlet, a coolant outlet, heat dissipation fins, an internal flow channel and a flow channel flow regulating port, wherein:

[0009] The frame body is provided with a hollow structure, and a plurality of slot groups are provided on the top surface, wherein the slot groups are composed of a plurality of the mounting slots, and the slot groups are used to place power components;

[0010] A plurality of internal flow channels are arranged in the frame body and correspondingly below the groove group, and a liquid inlet flow channel and a liquid return flow channel are arranged on both sides of the axial direction of the internal flow channel, and the liquid inlet flow channel and the liquid return flow channel are both semi-closed flow channels;

[0011] Heat dissipation fins of different sizes are arranged at intervals along the axial direction of the internal flow channel; and a coolant inlet and a coolant outlet are respectively provided on both sides of the bottom of the frame body.

[0012] Beneficial Effects

[0013] In view of the obvious shortcomings of the traditional liquid cooling method of active phased array radar antenna, the original split structure was changed to an integral structure, which effectively solved the leakage risk, improved the installation accuracy, and enhanced the structural strength. In addition, by adjusting the density and length of the fins inside the heat dissipation frame and the size of the flow regulating port, the reasonable distribution of the coolant inside the heat dissipation frame was achieved, and the heat dissipation effect was improved. The liquid cooling heat dissipation frame of the active phased array antenna has a simple structure and is easy to implement; it makes full use of the internal space of the active phased array antenna and has a compact structure; the adjustable heat dissipation fins have flexible and diverse adjustment methods, the flow regulating port size has a large adjustable range, and the welding process is good. It has obvious effects on improving the rationality of coolant distribution and the uniformity of antenna array surface temperature. It can be used to solve the heat dissipation problems of active phased array antennas and other similar high heat flux density products. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 This is the overall structural diagram of the framework body;

[0016] Figure 2 A top view of the frame body with a coolant inlet and outlet;

[0017] Figure 3 It is a bottom-up schematic diagram of the frame body;

[0018] Figure 4 It is a front sectional view of the frame body;

[0019] Figure 5 Schematic diagram of setting flow regulating ports for internal flow channels, where:

[0020] 1. Frame body; 2. Mounting groove; 3. Coolant inlet; 4. Coolant outlet; 5. Heat dissipation fins; 6. Internal flow channel; 7. Flow regulating port. DETAILED DESCRIPTION

[0021] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0022] The following describes the embodiments of the present disclosure through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present disclosure.

[0023] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present disclosure, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0024] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present disclosure, and only show the components related to the present disclosure rather than being drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout type may also be more complicated.

[0025] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, one skilled in the art will appreciate that aspects may be practiced without these specific details.

[0026] like Figures 1 to 5 The antenna liquid cooling heat dissipation frame structure shown in the figure includes an active phased array, including a frame body 1, a mounting slot 2, a coolant inlet 3, a coolant outlet 4, a heat dissipation fin 5, an internal flow channel 6 and a flow channel flow regulating port 7, wherein:

[0027] The frame body 1 is provided with a hollow structure, and a plurality of slot groups are provided on the top surface. The slot groups are composed of a plurality of mounting slots 2, and the slot groups are used to place power components;

[0028] A plurality of internal flow channels 6 are provided in the frame body 1 and below the groove group, and a liquid inlet flow channel and a liquid return flow channel are provided on both sides of the internal flow channel 6 in the axial direction. For example, the two ends of the internal flow channel 6 along the width direction of the frame body 1 are respectively connected to the liquid inlet flow channel and the liquid return flow channel. Both the liquid inlet flow channel and the liquid return flow channel are semi-closed flow channels, that is, the liquid flow channel and the liquid return flow channel are not connected separately, and the two are connected through the internal flow channel 6;

[0029] Heat dissipation fins 5 of different sizes are arranged at axial intervals along the internal flow channel 6. The heat dissipation fins 5 are evenly arranged in the hollow structure of the frame body 1 to form the internal flow channel 6. The frame body 1 has a coolant inlet 3 and a coolant outlet 4 on both sides of the bottom. When working, the coolant enters the frame body 1 from the coolant inlet 3, passes through the internal flow channel 6 formed by multiple heat dissipation fins 5, and finally flows out from the coolant outlet 4, thereby completing the heat dissipation process of the active phased array antenna heat dissipation frame.

[0030] Secondly, a flow regulation method of an antenna liquid cooling heat dissipation frame is provided, using the above antenna liquid cooling heat dissipation frame structure, the method comprising:

[0031] S101: Determine the number and size of the internal flow channels 6 and the target flow rate of each internal flow channel 6 according to the model of the antenna, which can be determined according to the signal of the electronic device, for example, according to the arrangement of the TR components on the antenna;

[0032] S102: Determine the maximum total heat consumption of the power components in each slot group. For example, the maximum heat dissipation of the power component model is determined according to the difference method.

[0033] S103: determining the flow rate of the coolant required for the corresponding internal flow channel 6 according to the maximum total heat consumption; for example, distributing the flow rates of the multiple internal flow channels 6 to Q1, Q2, Q3, Q4 and Q5;

[0034] S104: using simulation software (e.g., FLOEFD simulation software) to perform simulation calculation on the heat dissipation fins 5 initially arranged in the internal flow channel 6 to determine the initial flow rate;

[0035] S105: Re-determine the parameters of the heat dissipation fins 5 in each internal flow channel 6 according to the initial flow rate. Specifically,

[0036] All initial flow rates are compared or contrasted with the corresponding target flow rates. If the initial flow rate is greater than the corresponding target flow rate, the spacing between all the heat dissipating fins 5 in the corresponding internal flow channel 6 is increased and / or the length is increased;

[0037] If the initial flow rate is less than the corresponding target flow rate, the spacing between all the heat dissipating fins 5 in the corresponding internal flow channel 6 is thinned out and / or the length is reduced;

[0038] All adjusted internal flow channels 6 are simulated iteratively until all passing flow rates are equal to the corresponding target flow rates, the purpose of which is to achieve reasonable distribution of the coolant inside the liquid cooling heat dissipation frame of the active phased array antenna, thereby achieving uniform heat dissipation of the entire active phased array antenna array surface.

[0039] Further, if (within a certain parameter range, for example, the processing technology limits the flow channel width to be above 0.4 mm) the simulation iteration result cannot make the through flow rate equal to the corresponding target flow rate, and the internal flow channel 6 whose through flow rate is greater than the corresponding target flow rate is determined as an unbalanced flow channel;

[0040] Baffles are symmetrically arranged on both sides of the unbalanced flow channel, and flow regulating ports 7 are opened on the baffles along the flow direction of the coolant. Simulation and judgment are performed, wherein:

[0041] If the flow rate through the unbalanced flow channel is greater than the corresponding target flow rate, the size of the flow regulating port 7 is reduced; if the flow rate through the unbalanced flow channel is less than the corresponding target flow rate, the size of the flow regulating port 7 is increased;

[0042] The adjusted flow regulating port 7 is simulated and iterated again, and the adjustment is repeated according to the simulation results until all the passing flow rates are equal to the corresponding target flow rates. Preferably, if the required size of the adjusted flow regulating port 7 is ≤1mm, the shape of the flow regulating port 7 is set to an arch form and is processed by electric spark technology, the purpose of which is to avoid solder clogging.

[0043] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present disclosure should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. An antenna liquid cooling heat dissipation frame structure, the antenna includes an active phased array, characterized in that: It includes a frame body, a mounting groove, a coolant inlet, a coolant outlet, a heat dissipation fin, an internal flow channel and a flow channel flow regulating port, wherein: The frame body is provided with a hollow structure, and a plurality of slot groups are provided on the top surface, wherein the slot groups are composed of a plurality of the mounting slots, and the slot groups are used to place power components; A plurality of internal flow channels are arranged in the frame body and correspondingly below the groove group, and a liquid inlet flow channel and a liquid return flow channel are arranged on both sides of the axial direction of the internal flow channel, and the liquid inlet flow channel and the liquid return flow channel are both semi-closed flow channels; Heat dissipation fins of different sizes are arranged at intervals along the axial direction of the internal flow channel; and a coolant inlet and a coolant outlet are respectively provided on both sides of the bottom of the frame body.

2. A flow regulation method for an antenna liquid cooling heat dissipation frame, characterized in that: Use the antenna liquid cooling and heat dissipation frame structure as described in claim 1.

3. The flow rate regulation method according to claim 2, characterized in that: The flow regulation method comprises: Determining the number and size of the internal flow channels and the target flow rate of each of the internal flow channels according to the model of the antenna; Determining the maximum total heat dissipation of the power components in each column of the slot group; Determining the flow rate of coolant required for the corresponding internal flow channel according to the maximum total heat consumption; The heat dissipation fins initially arranged in the internal flow channel are simulated and calculated using simulation software to determine the initial flow rate; The parameters of the heat dissipation fins in each of the internal flow channels are re-determined according to the initial flow rate.

4. The flow rate regulation method according to claim 3, characterized in that: Re-determining the parameters of each heat sink fin in the internal flow channel according to the initial flow rate includes: All the initial flow rates are compared or contrasted with the corresponding target flow rates. If the initial flow rate is greater than the corresponding target flow rate, the spacing between all the heat dissipating fins in the corresponding internal flow channel is increased and / or the length is increased; If the initial flow rate is less than the corresponding target flow rate, the spacing of all the heat dissipation fins in the corresponding internal flow channel is thinned out and / or the length is reduced; All adjusted internal flow channels are simulated iteratively until all the through flow rates are equal to the corresponding target flow rates.

5. The flow rate regulation method according to claim 4, characterized in that: If the simulation iteration result shows that the through flow rate cannot be equal to the corresponding target flow rate, and the internal flow passage whose through flow rate is greater than the corresponding target flow rate is determined as an unbalanced flow passage; Baffles are symmetrically arranged on both sides of the unbalanced flow channel, and flow regulating ports are opened on the baffles along the flow direction of the coolant. Simulation and judgment are performed, wherein: If the flow rate through the unbalanced flow channel is greater than the corresponding target flow rate, the size of the flow regulating port is reduced; if the flow rate through the unbalanced flow channel is less than the corresponding target flow rate, the size of the flow regulating port is increased; The adjusted flow regulating port is subjected to simulation iteration again, and adjustment is repeated according to the simulation result until all the passing flows are equal to the corresponding target flows.

6. The flow rate regulation method according to claim 5, characterized in that: If the required size of the adjusted flow regulating port is ≤1mm, the shape of the flow regulating port is set to an arch form and is processed by an electric spark process.

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