CN115219169A - A method for testing uniformity of liquid-cooled channel distribution network design of liquid-cooled cold plate - Google Patents

Abstract

The invention discloses a method for testing the design uniformity of a liquid cooling runner shunting network of a liquid cooling cold plate, which comprises the steps of arranging pneumatic connectors at a plurality of preset test points corresponding to each stage of runner of a multistage shunting network in a runner test piece, connecting the pneumatic connectors in series by utilizing a pressure detection assembly, starting a liquid supply pipeline, keeping cold flow in the runner test piece flowing by utilizing a cold liquid inlet and a cold liquid outlet, obtaining the pressure values of the preset test points acquired by the pressure detection assembly, and judging whether the uniformity of the liquid cooling runner shunting network meets the design requirements or not. According to the invention, the test of the design uniformity of the liquid cooling runner shunting network is converted into the judgment of the runner pressure value and the pressure difference value, so that the test and the verification of the design uniformity of the liquid cooling runner grading network are realized under the condition of not influencing the fluid flow path in the liquid cooling runner, the limitation of the size of the liquid cooling cold plate and the position of a test space is avoided, and the test efficiency and the convenience of the liquid cooling cold plate are improved.

Description

A method for testing uniformity of liquid-cooled channel distribution network design of liquid-cooled cold plate

technical field

The invention relates to the technical field of heat dissipation structure design of electronic equipment, in particular to a method for testing the uniformity of the design of a liquid-cooled flow channel shunt network of a liquid-cooled cold plate.

Background technique

In electronic devices with high heat flux density, liquid cooling design has become the mainstream heat dissipation method for electronic devices. For the heat dissipation of the liquid-cooled cold plate with multi-chip and multi-channel hierarchical network, the uniformity of the design of the liquid-cooled runner distribution network directly affects the utilization rate of the cooling liquid, which in turn affects the heat dissipation effect of the cooling system.

In engineering applications, the liquid cooling channel is usually a closed whole, and the liquid cooling plate is limited in size and test space position. The method of directly judging the uniformity of the flow channel design by the flow value is difficult to meet the actual use requirements. Therefore, how to test and verify the uniformity of the liquid-cooled channel grading network design without affecting the fluid flow path in the liquid-cooled channel is a technical problem that needs to be solved urgently.

The above content is only used to assist the understanding of the technical solutions of the present invention, and does not mean that the above content is the prior art.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide a method for testing the uniformity of liquid-cooled channel distribution network design of a liquid-cooled cold plate, which aims to solve the current method for testing the uniformity of liquid-cooled channels, which is limited by the volume of the liquid-cooled cold plate and the position of the test space. major technical issues.

In order to achieve the above object, the present invention provides a method for testing the uniformity of liquid-cooled flow channel distribution network design for a liquid-cooled cold plate, the liquid-cooled cold plate includes a flow channel base and a flow channel test piece, and the method includes the following steps :

S1: Connect the flow channel test piece and the flow channel base with a double-pass liquid cooling connector, so that the cold liquid in the cold liquid inlet of the flow channel base flows into the flow channel test piece, and the flow channel The cooling liquid outlet of the channel base discharges the cooling liquid in the flow channel test piece;

S2: set pneumatic joints at several preset test points of the flow channel test piece, and use a pressure detection component to connect the pneumatic joints in series; wherein, the preset test points correspond to the most of the flow channel test pieces Each stage of the flow channel of the stage shunt network;

S3: Start the liquid supply pipeline, use the cold liquid inlet and the cold liquid outlet to maintain the cold flow in the flow channel test piece, and obtain the pressure value of the preset test point collected by the pressure detection component;

S4: According to the pressure value of the preset test point, determine whether the uniformity of the distribution network of the liquid cooling channel meets the design requirements.

Optionally, the flow channel test piece includes an upper cover of the flow channel to be measured and a base of the flow channel to be measured. The upper cover of the flow channel to be measured and the base of the flow channel to be measured are welded and fixed by a vacuum brazing process. A multi-stage shunt network with multi-stage flow channels is formed between the channel upper cover and the measured channel base.

Optionally, the multi-stage shunt network adopts a parallel symmetrical multi-stage flow channel design.

Optionally, the preset test point is set on the upper cover of the flow channel to be tested, and corresponds to the position of each stage of the flow channel in the flow channel test piece.

Optionally, the preset test point is set at the position of the upper cover of the flow channel under test corresponding to the inlet and the outlet of each stage of the flow channel.

Optionally, the pressure detection component includes a PU gas pipe, a pressure gauge and a throttle valve, the first end of the PU gas pipe is connected to the pneumatic joint, and the second end of the PU gas pipe is connected to the throttle valve, so the The pressure gauge is arranged on the PU air pipe.

Optionally, the step S4 is specifically:

According to whether the pressure values of the symmetrical preset test points are respectively within the preset range, it is judged whether the uniformity of the main channel of the liquid-cooled channel shunt network meets the design requirements;

According to whether the pressure difference between the inlet and the outlet corresponding to each stage of the flow channel is within the error range, it is judged whether the uniformity of each stage of the flow channel of the liquid-cooled flow channel distribution network meets the design requirements.

Optionally, after the step S4, the method further includes:

S5: If the uniformity of the distribution network of the liquid-cooled flow channel does not meet the design requirements, adjust the design parameters of the distribution network of the liquid-cooled flow channel, and obtain a flow channel test piece corresponding to the design parameters according to the adjusted design parameters;

S6: Using the flow channel test piece, return to step S1 until the uniformity of the liquid-cooled flow channel shunt network meets the design requirements;

S7: Obtain the design parameters of the liquid-cooled flow-channel flow-distribution network when the uniformity of the liquid-cooled flow channel flow-distribution network meets the design requirements, and use the design parameters as standard parameters to realize mass production of the liquid-cooled cold plate.

An embodiment of the present invention proposes a method for testing the uniformity of a liquid-cooled flow channel distribution network design for a liquid-cooled cold plate. Pneumatic joints are set at several preset test points corresponding to each stage of the multi-stage shunt network in the test piece, and the pneumatic joints are connected in series with the pressure detection component, the liquid supply pipeline is activated, and the cooling liquid inlet and the cooling liquid outlet are used to maintain the The cold flow flows in the flow channel test piece, and the pressure value of the preset test point collected by the pressure detection component is obtained to judge whether the uniformity of the liquid-cooled flow channel distribution network meets the design requirements. The present invention realizes the design of the liquid-cooled flow channel classification network without affecting the fluid flow path in the liquid-cooled flow channel by converting the test of the uniformity of the design of the liquid-cooled flow channel distribution network into the judgment of the flow channel pressure value and the pressure difference value. The uniformity test and verification is not limited by the size of the liquid-cooled cold plate and the position of the test space, which improves the testing efficiency and convenience of the liquid-cooled cold plate.

Description of drawings

1 is a schematic flowchart of a method for testing the uniformity of a liquid-cooled flow channel distribution network design of a liquid-cooled cold plate in an embodiment of the present invention;

2 is a schematic diagram of the installation layout of the device under test and the test method in the embodiment of the present invention;

FIG. 3 is a schematic diagram of a distribution network stress test point in an embodiment of the present invention.

Description of reference numbers:

1- The upper cover of the flow channel under test; 2- The base of the flow channel under test; 3- Pneumatic joint; 4- The flow channel base.

The realization, functional characteristics and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

In engineering applications, the liquid-cooled flow channel is usually a closed whole, and the liquid-cooled cold plate is limited in size. The method of judging the uniformity of runner design is difficult to meet the actual use requirements. Therefore, how to test and verify the uniformity of the liquid-cooled channel grading network design without affecting the fluid flow path in the liquid-cooled channel is a technical problem that needs to be solved urgently.

In order to solve this problem, various embodiments of the uniformity testing method of the liquid-cooled channel distribution network design of the liquid-cooled cold plate of the present invention are proposed. The method for testing the uniformity of the design of the liquid-cooled flow channel distribution network of the liquid-cooled cold plate provided by the present invention converts the test of the design uniformity of the liquid-cooled flow channel distribution network into the judgment of the flow channel pressure value and the pressure difference, without affecting the liquid-cooled flow channel distribution network design uniformity test method. In the case of the fluid flow path in the cold runner, the test and verification of the uniformity of the grading network design of the liquid-cooled runner can be realized. It is not limited by the size of the liquid-cooled cold plate and the position of the test space, and the test efficiency of the liquid-cooled cold plate is improved. Convenience.

An embodiment of the present invention provides a method for testing the uniformity of the design of a liquid-cooled channel distribution network of a liquid-cooled cold plate. Referring to FIG. 1, FIG. 1 is a method for testing the uniformity of the design of a liquid-cooled channel distribution network for a liquid-cooled cold plate of the present invention. Schematic flow diagram of an embodiment of .

In this embodiment, the liquid-cooled cold plate includes a flow channel base and a flow channel test piece, and the method for testing the uniformity of the liquid-cooled flow channel distribution network design of the liquid-cooled cold plate includes the following steps:

S1: Connect the flow channel test piece and the flow channel base with a double-pass liquid cooling connector, so that the cold liquid in the cold liquid inlet of the flow channel base flows into the flow channel test piece, and the flow channel The cooling liquid outlet of the channel base discharges the cooling liquid in the flow channel test piece;

S2: set pneumatic joints at several preset test points of the flow channel test piece, and use a pressure detection component to connect the pneumatic joints in series; wherein, the preset test points correspond to the most of the flow channel test pieces Each stage of the flow channel of the stage shunt network;

S3: Start the liquid supply pipeline, use the cold liquid inlet and the cold liquid outlet to maintain the cold flow in the flow channel test piece, and obtain the pressure value of the preset test point collected by the pressure detection component;

S4: According to the pressure value of the preset test point, determine whether the uniformity of the distribution network of the liquid cooling channel meets the design requirements.

In some embodiments, after step S4, the method further includes:

S5: If the uniformity of the distribution network of the liquid-cooled flow channel does not meet the design requirements, adjust the design parameters of the distribution network of the liquid-cooled flow channel, and obtain a flow channel test piece corresponding to the design parameters according to the adjusted design parameters;

S6: Using the flow channel test piece, return to step S1 until the uniformity of the liquid-cooled flow channel shunt network meets the design requirements;

S7: Obtain the design parameters of the liquid-cooled flow-channel flow-distribution network when the uniformity of the liquid-cooled flow channel flow-distribution network meets the design requirements, and use the design parameters as standard parameters to realize mass production of the liquid-cooled cold plate.

In this embodiment, the test method for the uniformity of the design of the distribution network of the liquid-cooled flow channel requires the aid of the liquid-cooled cold plate DUT, and the DUT adopts a parallel symmetrical flow channel design. Different branch flow channels are designed under the condition of process resistance. The design goal is to ensure the uniformity of flow at No. 1, No. 2, No. 3 and No. 4 positions. Uniformity of liquid supply in tiny channels. This test method is used to verify whether the flow channel design of the DUT is reasonable.

Referring to FIG. 2 , the component under test is mainly composed of: the upper cover of the flow channel to be measured 1 , the base of the flow channel to be measured 2 , the pneumatic joint 3 , and the flow channel base 4 . The upper cover 1 of the flow channel to be tested and the base 2 of the flow channel to be measured are welded together by a vacuum brazing welding process to form a DUT with a closed flow channel. The DUT and the flow channel base 4 are connected by a double-pass liquid-cooled connector.

Referring to Figure 3, at the position of the upper cover of the upper cover 1 of the flow channel to be tested close to the inlet and outlet of the multi-stage flow channel, 8 test points are arranged. Point 1-B; by analogy, set test point 2-A and test point 2-B at the inlet and outlet of position 2; set test point 3-A and test point 3-B at the inlet and outlet of position 3; Test point 4-A and test point 4-B are set at the inlet and outlet of position 4, and a pneumatic connector is installed at the test point.

Test principle: Design multiple pressure test points at the upper cover of the liquid-cooled cold plate flow channel of the liquid-cooled flow channel shunt network, install pneumatic joints at the test points, and connect the corresponding specifications of PU gas pipes, pressure gauges and throttling in series at the joints. The valve uses the blocking effect of the throttle valve to keep the fluid working medium flowing in the liquid-cooled flow channel. Numerically realize the numerical test and verification of the design uniformity of the flow channel distribution network. By reading the pressure difference value of the pressure gauge corresponding to each stage of the flow channel, the numerical test and verification of the design uniformity of each flow channel of the flow channel distribution network is realized. .

Test steps: Step 1: Install the liquid supply pipeline of the DUT; Step 2: Set the liquid supply flow rate of the main channel; Step 3: Close the throttle valve corresponding to each test point, and reset the pressure gauge to zero; Step 4: Start the liquid supply system of the liquid supply pipeline; Step 5: Read the value displayed by the pressure gauge at each test point; Step 6: Record the value and analyze the uniformity of the flow channel design.

This embodiment provides a method for testing the uniformity of the distribution network design of the liquid-cooled flow channel of the liquid-cooled cold plate. The test method is suitable for practical engineering applications and is not limited by the volume of the liquid-cooled cold plate and does not affect the fluid in the liquid-cooled flow channel. In the case of the flow path, it is convenient to verify the uniformity of the distribution network design of the liquid-cooled runner, and the application of its test method can be extended to the test verification of the uniformity of the multi-stage runner design.

Obviously, the described embodiments are only some, but not all, embodiments of the invention. Based on the embodiments in the invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the invention.

It should be noted that all directional indications (such as up, down, left, right, front, rear...) in the embodiments of the present invention are only used to explain the relative relationship between various components under a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly.

In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exists, and it is not within the protection scope of the invention requirement.

The above are only the preferred embodiments of the invention, and are not intended to limit the scope of the invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the invention, or directly or indirectly used in other related technical fields, are the same as The principle is included in the scope of patent protection of the invention.

Claims (8)

1. A method for testing the uniformity of liquid-cooled flow channel distribution network design of a liquid-cooled cold plate, wherein the liquid-cooled cold plate comprises a flow channel base and a flow channel test piece, and the method comprises the following steps: S1: Connect the flow channel test piece and the flow channel base with a double-pass liquid cooling connector, so that the cold liquid in the cold liquid inlet of the flow channel base flows into the flow channel test piece, and the flow channel The cooling liquid outlet of the channel base discharges the cooling liquid in the flow channel test piece; S2: set pneumatic joints at several preset test points of the flow channel test piece, and use a pressure detection component to connect the pneumatic joints in series; wherein, the preset test points correspond to the most of the flow channel test pieces Each stage of the flow channel of the stage shunt network; S3: Start the liquid supply pipeline, use the cold liquid inlet and the cold liquid outlet to maintain the cold flow in the flow channel test piece, and obtain the pressure value of the preset test point collected by the pressure detection component; S4: According to the pressure value of the preset test point, determine whether the uniformity of the distribution network of the liquid cooling channel meets the design requirements. 2. The method for testing the uniformity of liquid-cooled flow channel shunt network design of a liquid-cooled cold plate as claimed in claim 1, wherein the flow channel test piece comprises a measured flow channel upper cover and a measured flow channel base, so The upper cover of the flow channel to be tested and the base of the flow channel to be measured are welded and fixed by vacuum brazing process, and a multi-stage shunt network with multi-stage flow channels is formed between the upper cover of the flow channel to be measured and the base of the flow channel to be measured. 3 . The method for testing the uniformity of liquid-cooled flow channel distribution network design of a liquid-cooled cold plate according to claim 2 , wherein the multi-stage distribution network adopts a parallel symmetrical multi-stage flow channel design. 4 . 4. The method for testing the uniformity of liquid-cooled flow channel shunt network design of a liquid-cooled cold plate according to claim 2, wherein the preset test point is set on the upper cover of the measured flow channel, and is connected with the The position of each stage of the runner in the runner test piece corresponds. 5. The method for testing the uniformity of liquid-cooled flow channel distribution network design of a liquid-cooled cold plate as claimed in claim 4, wherein the preset test point is set at the inlet of each level of flow channel corresponding to the outlet. The position of the upper cover of the flow channel under test. 6. The method for testing the uniformity of liquid-cooled flow channel distribution network design of a liquid-cooled cold plate as claimed in claim 1, wherein the pressure detection assembly comprises a PU gas pipe, a pressure gauge and a throttle valve, and the PU gas pipe The first end of the PU air pipe is connected to the pneumatic joint, the second end of the PU air pipe is connected to the throttle valve, and the pressure gauge is arranged on the PU air pipe. 7. The method for testing the uniformity of liquid-cooled flow channel distribution network design of a liquid-cooled cold plate as claimed in claim 5, wherein the step S4 is specifically: According to whether the pressure values of the symmetrical preset test points are respectively within the preset range, it is judged whether the uniformity of the main channel of the liquid-cooled channel shunt network meets the design requirements; According to whether the pressure difference between the inlet and the outlet corresponding to each stage of the flow channel is within the error range, it is judged whether the uniformity of each stage of the flow channel of the liquid-cooled flow channel distribution network meets the design requirements. 8. The method for testing the uniformity of liquid-cooled flow channel distribution network design of a liquid-cooled cold plate according to claim 1, wherein after the step S4, the method further comprises: S5: If the uniformity of the distribution network of the liquid-cooled flow channel does not meet the design requirements, adjust the design parameters of the distribution network of the liquid-cooled flow channel, and obtain a flow channel test piece corresponding to the design parameters according to the adjusted design parameters; S6: Using the flow channel test piece, return to step S1 until the uniformity of the liquid-cooled flow channel shunt network meets the design requirements; S7: Obtain the design parameters of the liquid-cooled flow-channel flow-distribution network when the uniformity of the liquid-cooled flow channel flow-distribution network meets the design requirements, and use the design parameters as standard parameters to realize mass production of the liquid-cooled cold plate.

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