CN-121994051-A - Multi-heat source heat pipe system with adjustable heat transfer path

CN121994051ACN 121994051 ACN121994051 ACN 121994051ACN-121994051-A

Abstract

The invention discloses a multi-heat source heat pipe system with an adjustable heat transfer path, which relates to the technical field of heat pipes and comprises a throttling device, three multi-heat source heat pipe systems which can be realized based on the throttling device, and control logic, wherein the throttling device is used for controlling the flow of a liquid working medium in the heat pipe, and according to different heat pipe types, the throttling device is provided with a type A throttling device, a type B throttling device, a type C throttling device and a type D throttling device. According to the multi-heat-source heat pipe system with the adjustable heat transfer paths, an independent throttling device is configured for each heat source and used for selectively cutting off or communicating the heat transfer paths of the heat sources, and heat series flows among different heat sources are effectively isolated by accurately adjusting the flow of liquid working media in each heat transfer channel, so that the multi-heat-source heat pipe system with a star structure, a tree structure and a parallel loop structure is realized, and the multi-heat-source heat pipe system with different topological structures is adapted.

Inventors

ZHANG JIANQIU
CHEN RONGWANG
ZHANG ZHEN
WU YONGBING
WU JINTAO

Assignees

浙江荣际科创股份有限公司

Dates

Publication Date: 20260508
Application Date: 20251216

Claims (9)

1. The multi-heat source heat pipe system with the adjustable heat transfer path comprises a throttling device and control logic, and is characterized in that the throttling device is used for controlling the flow of liquid working medium in a heat pipe, and according to different heat pipe types, the throttling device has the following forms: The A-type throttling device is suitable for a grooved heat pipe, and the excitation device generates a magnetic field or a temperature field to deform the excited deformation material and change the continuity and depth of the groove so as to block a liquid path; The B-type throttling device is suitable for sintering heat pipes, the sintering material of the controlled section adopts a magneto-induced or temperature-induced deformation material, the excitation device generates a magnetic field or a temperature field, so that the porosity and the pore diameter of the deformation material are changed, and a capillary force bottleneck is formed in the controlled section, thereby blocking a liquid path; The C-type throttling device is simultaneously applicable to grooved and sintered heat pipes, an ultrasonic transducer is arranged outside the heat pipe, and high-frequency ultrasonic waves are used for carrying out vibration excitation on liquid working media in the heat pipe, so that the liquid working media are cavitated at a controlled section, and a liquid path is blocked; The D-type throttling device is suitable for loop heat pipes, the inner wall of a pipeline of the liquid part of the loop heat pipe is smooth and has no groove or sintering structure, liquid working medium flows in the middle of the pipeline, and the flow control principle is the same as that of the C-type throttling device; the three multi-heat-source heat pipe systems which can be realized based on the throttling device are a star-shaped multi-heat-source heat pipe system, a tree-shaped multi-heat-source heat pipe system and a parallel multi-heat-source loop heat pipe system.
2. A multiple heat source heat pipe system with adjustable heat transfer path according to claim 1 wherein the type a throttle device, type B throttle device are of the stimulated deformation material available: the magnetically deformable material is terbium dysprosium iron alloy, iron cobalt vanadium alloy and magnetically active polymer; and the temperature-induced deformation material is nickel-titanium alloy, other copper-based and iron-based alloy.
3. The multiple heat source heat pipe system with adjustable heat transfer path as set forth in claim 1, wherein the heat sources are distributed in a star shape around a central node, the heat sources are connected with the central node by heat pipes, and a throttling device is installed on the heat pipes connecting the heat sources with the central node.
4. The multiple heat source heat pipe system with adjustable heat transfer path as set forth in claim 1, wherein the topology structure of the tree-type multiple heat source heat pipe system is characterized by comprising two or more nodes, wherein the heat sources are distributed in a star shape around the nearest node, the nodes are connected by a single heat pipe, no throttling device is arranged between the nodes, the heat source is connected with the nearest node by the heat pipe, and the throttling device is arranged on the heat pipe connecting the heat source with the nearest node.
5. The multiple heat source heat pipe system with adjustable heat transfer path as set forth in claim 1, wherein the parallel multiple heat source loop heat pipe system has a topology structure characterized in that all heat sources are connected in parallel, the evaporation end and the condensation end are respectively located at two sides of the liquid storage device, all liquid working medium pipelines are located at one side close to the liquid storage device, each heat source is provided with a throttling device, and the throttling device is installed at one side of the liquid working medium pipelines.
6. The multiple heat source heat pipe system with adjustable heat transfer path as set forth in claim 5, wherein the working medium circulating direction of said parallel multiple heat source loop heat pipe system is evaporation end-condensation end-reservoir.
7. A multiple heat source heat pipe system with adjustable heat transfer paths as set forth in claim 1, wherein said control logic steps are as follows: s1, starting: Initializing a system, and preparing for data acquisition and processing; S2, data acquisition: for each heat source i=1 toN, reading heat source temperature T [ i ], reading heat source heat transfer power Q [ i ]; s3, judging the roles of the heat sources: Judging whether each heat source needs to be cooled or heated: if T [ i ] > T_cool [ i ], then the heat source i is recorded into an evaporation end list Evap [ ]; If T [ i ] < T_heat [ i ], then the heat source i is recorded into a condensing end list Econd [ ]; s4, sequencing the heat source priority: The heat sources in the evaporation end list are subjected to priority ranking according to the difference value of the T [ i ] and the T_cool [ i ]; The heat sources in the condensation end list are subjected to priority ranking according to the difference value of the T [ i ] and the T_heat [ i ]; S5, heat source pairing and path generation: Pairing the evaporation end with the highest priority with the condensation end, and generating a path according to a pairing rule, namely a connection mode of the evaporation end and the condensation end; S6, executing the action of the throttling device: Corresponding throttling devices are opened or closed according to pairing decision, heat exchange is started between allocated heat sources, and unassigned heat sources are kept in a standby state; s7, state detection and alarm: Monitoring the temperature and the power of each heat source in real time, monitoring whether the current pairing state violates the pairing rule, and giving an alarm if the heat source with high priority cannot be matched with a heat exchange path; S8, returning: The system continuously runs the control logic, and the pairing of the heat transfer path and the heat source is dynamically adjusted according to the real-time working condition, so that the high-efficiency and stable running of the system is ensured.
8. The multiple heat source heat pipe system with adjustable heat transfer path according to claim 7, wherein in step S5, the pairing rules include: at least one evaporation end and one condensation end are present; The temperature of all evaporation ends participating in heat exchange is higher than that of all condensation ends; the working temperature range of the working medium covers all evaporation ends and condensation ends which participate in heat exchange; the total power of the evaporation ends participating in heat exchange is close to the total output power of the condensation ends; the maximum temperature difference between the evaporation end and the condensation end cannot be higher than a set threshold value; The star/tree type multi-heat source heat pipe system has no dead circulation, i.e. a closed circulation path does not exist.
9. The multiple heat source heat pipe system with adjustable heat transfer path as set forth in claim 7, wherein the throttling device activation rule dynamically activates the corresponding throttling device according to the working state and priority of the heat source, so that the heat pipe connecting the evaporation end and the condensation end is in a liquid working medium circulating state, the other throttling devices are not activated, and the other heat sources and the heat pipe are in a liquid working medium non-circulating state.

Description

Multi-heat source heat pipe system with adjustable heat transfer path Technical Field The invention relates to the technical field of heat pipes, in particular to a multi-heat-source heat pipe system with an adjustable heat transfer path. Background The heat pipe rapidly transfers heat at the evaporation end to the condensation end for heat exchange through the circulation evaporation-condensation-reflux process of the working medium in the closed pipe. Conventional heat pipes can be generally classified into conventional heat pipes and loop heat pipes according to the circulation mode of working medium. The condensation end and the evaporation end of the conventional heat pipe are connected by a single pipeline, and the phase change circulation flow of the liquid and gaseous working media is completed in the same pipeline, namely, the liquid working media flow in grooves or capillary structures on the inner wall of the heat pipe, and the gaseous working media flow in a cavity in the middle of the heat pipe in the opposite direction to the liquid working media. The condensing end and the evaporating end of the loop heat pipe are connected by independent gaseous working medium pipelines and liquid working medium pipelines to form a circulation loop. However, the conventional heat pipe has the following technical problems, whether it is a conventional heat pipe or a loop heat pipe: Firstly, only heat exchange can be realized between a single pair of heat sources, and multi-heat-source heat exchange cannot be realized. The traditional heat pipe adopts a single fixed heat transfer channel, and the working medium can only circulate between one evaporation end and one condensation end. In a multi-heat source scene, heat interaction of a plurality of heat sources cannot be flexibly organized, and heat of different heat sources can mix and flow to cause series flow and mutual interference. And secondly, the passive heat transfer causes uncontrollable paths. The working medium circulation of the traditional heat pipe is a completely passive spontaneous process. After the installation is completed, the heat transfer path is fixed by a geometric structure and cannot be dynamically adjusted according to actual working conditions. The change of working condition cannot be sensed and responded, and only constant passive heat dissipation can be provided. Heat can still continuously leak when heat dissipation is not needed, and thermal isolation and dynamic path management cannot be realized. Thirdly, the optimization of heat distribution cannot be performed. The heat distribution of conventional heat pipes is passive, fixed, non-optimal. When multiple heat sources share limited heat dissipation resources, heat exchange resources cannot be intelligently distributed according to factors such as heat source priority, temperature, power requirements and the like. The overall heat exchange balance, stability and efficiency of the system tend to be lower than theoretically achievable. Disclosure of Invention The present invention is directed to a multi-heat-source heat pipe system with adjustable heat transfer paths, so as to solve the above-mentioned problems in the prior art. In order to achieve the above purpose, the invention provides a multi-heat source heat pipe system with adjustable heat transfer paths, which comprises a throttling device, three multi-heat source heat pipe systems which can be realized based on the throttling device, and control logic, wherein the throttling device is used for controlling the flow of liquid working media in a heat pipe, and according to different heat pipe types, the throttling device has the following forms: The A-type throttling device is suitable for a grooved heat pipe, and one precondition that the grooved heat pipe can work is that the grooves are continuous and have enough depth to generate capillary force, so that liquid-state working fluid can flow in the grooves, and the exciting device generates a magnetic field or a temperature field to deform the excited deformation material, so that the continuity and the depth of the grooves are changed, and a liquid path is blocked; The B-type throttling device is suitable for a sintered heat pipe, and one precondition for the sintered heat pipe to work is that the porosity of a sintered structure is moderate (generally 30% -60%) so as to generate enough capillary force, a controlled section sintering material adopts a magneto or temperature-induced deformation material, and an excitation device generates a magnetic field or a temperature field so that the porosity and the pore diameter of the deformation material are changed, and a capillary force bottleneck is formed in a controlled section, thereby blocking a liquid path; The C-type throttling device is simultaneously suitable for grooved and sintered heat pipes, adopts cavitation throttling technology, such as ultrasonic cavitation, installs an ultrasonic transducer outside the heat