A flow resistance test apparatus

Abstract

The utility model discloses a flow resistance test test device, including water chiller, water chiller both sides intercommunication connection return flow subassembly, return flow subassembly one end intercommunication connection has the return pipe, return pipe one end outside intercommunication connection has water chiller outlet valve, return pipe middle part intercommunication connection has pressure bucket, pressure bucket bottom end intercommunication connection has gas supply component, return pipe far from water chiller one end outside intercommunication connection has sample inlet pressure gauge, return pipe far from water chiller one end intercommunication connection has test sample placing box, test sample placing box far from return pipe one side intercommunication connection has the shunt component, the shunt component outside intercommunication connection has the detection component, the detection component far from the shunt component one end intercommunication connection has the drain pipe, the drain pipe outside intercommunication connection has sample outlet detection component, and this device expands the use range, improves the test precision, solves the problem of unstable and big test error in the small flow test.

Description

Technical Field

[0001] This utility model relates to the field of thermal management performance testing technology, specifically a flow resistance testing device. Background Technology

[0002] The flow resistance of a product is a key parameter that affects its heat dissipation performance. Under the same temperature and pressure, the smaller the flow resistance of a product, the better its heat dissipation performance. As the types of new energy thermal management products increase, the products being tested have multiple inlets and outlets. Testing needs to be carried out in a situation of one inlet and multiple outlets or multiple inlets and one outlet. Therefore, the requirements for the accuracy of the flow resistance test of the product are also getting higher and higher.

[0003] Existing flow resistance testing equipment does not take into account the pulsation generated by the pump during operation and the noise fluctuations in the pipeline, resulting in the test accuracy not meeting the relevant test requirements. Utility Model Content

[0004] The purpose of this invention is to provide a flow resistance testing device to solve the problem mentioned in the background art that the existing flow resistance testing equipment does not take into account the pulsation generated by the pump during operation and the noise fluctuation in the pipeline, resulting in the test accuracy not meeting the relevant test requirements.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a flow resistance testing device, comprising a chiller, with a return assembly connected to both sides of the chiller, a return water pipe connected to one end of the return assembly, a chiller outlet valve connected to the outer side of one end of the return water pipe, a pressure tank connected to the middle of the return water pipe, an air supply assembly connected to the bottom of the pressure tank, a sample inlet pressure gauge connected to the outer side of the end of the return water pipe away from the chiller, a test sample placement box connected to the end of the return water pipe away from the chiller, a flow divider connected to the side of the test sample placement box away from the return water pipe, a detection assembly connected to the outer side of the flow divider, a drain pipe connected to the end of the detection assembly away from the flow divider, and a sample outlet detection assembly connected to the outer side of the drain pipe. This device expands the application range of the device, improves the testing accuracy, solves the problems of instability and large testing errors in small flow tests, and with the addition of a bypass valve, small flow tests are more stable, and the temperature and flow test range is wider.

[0006] Preferably, the reflux assembly includes a circulation pipeline connected to both sides of the chiller, and a bypass regulating valve for the chiller is connected to the middle of the circulation pipeline. The addition of the bypass valve makes the small flow test more stable, and the adjustable detection is more targeted.

[0007] Preferably, the air supply component includes an air inlet pipe connected to the bottom of the pressure tank. A compressed air regulating valve is connected to the middle of the outer side of the air inlet pipe, so that the flow resistance test can accurately control the flow rate of compressed air to simulate the airflow under different working conditions. The compressed air regulating valve can accurately adjust the flow rate of compressed air according to the test requirements to ensure that the airflow is stable and meets the test conditions during the test.

[0008] Preferably, the flow splitting assembly includes a flow splitting pipe connected to one end of a drain pipe. A first branch pipe and a second branch pipe are symmetrically connected to the outside of the flow splitting pipe. The flow rate entering each test branch can be precisely adjusted through the flow splitting pipe. This helps simulate the flow resistance under different flow rates in actual operating conditions, meeting various testing requirements.

[0009] Preferably, the detection component includes a pressure gauge at sample outlet one, a pressure gauge at sample outlet two, a flow meter at sample outlet one, a flow meter at sample outlet two, a control valve at sample outlet one, and a control valve at sample outlet two. The pressure gauge at sample outlet two, the flow meter at sample outlet two, and the control valve at sample outlet two are sequentially connected to the outside of the first branch pipe. The pressure gauge at sample outlet one, the flow meter at sample outlet one, and the control valve at sample outlet one are sequentially connected to the outside of the second branch pipe. This helps to detect whether the system pressure is within a safe range, prevents excessive pressure from causing safety accidents or damage to the equipment, accurately measures the flow rate of the fluid flowing out of the sample outlet, provides accurate flow data for flow resistance testing, and precisely adjusts the fluid flow rate at the sample outlet to meet the flow requirements of different testing conditions.

[0010] Preferably, the sample outlet detection component includes a sample outlet total pressure gauge and a chiller return valve. The sample outlet total pressure gauge and the chiller return valve are connected to the outside of the drain pipe near the chiller to measure and display the total pressure at the sample outlet, allowing the operator to understand the pressure status of the entire testing system at the sample outlet. By adjusting the return valve, an appropriate amount of cooling water can be returned to the chiller to maintain the normal operation of the cooling system and ensure temperature stability during the test.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This device adds a pressure tank to the pipeline for flow resistance testing. By adjusting the pressure in the pressure tank, the pressure pulsation generated by the pump during operation is offset, so that the pressure fluctuation in the pipeline is controlled below 0.1 kPa, which improves the test accuracy. The test device is composed of a chiller, a precision pressure gauge, a flow meter and a pressure tank. It can perform flow resistance testing on products with one inlet and multiple outlets or multiple inlets and one outlet, thus expanding the scope of application of the device.

[0013] This experimental setup solves the problems of instability and large testing errors in low-flow-rate testing. With the addition of a bypass valve, low-flow-rate testing is more stable, and the temperature and flow rate testing range is wider. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a top view of the present invention;

[0016] Figure 3 This utility model Figure 1 A magnified view of the structure at point A in the middle;

[0017] Figure 4 This is a schematic diagram of the structural principle of this utility model.

[0018] In the diagram: 1. Chiller; 2. Chiller outlet valve; 3. Compressed air regulating valve; 4. Sample inlet pressure gauge; 5. Sample outlet pressure gauge 1; 6. Sample outlet pressure gauge 2; 7. Sample outlet flow meter 1; 8. Sample outlet flow meter 2; 9. Sample outlet control valve 1; 10. Sample outlet control valve 2; 11. Sample outlet total pressure gauge; 12. Chiller return valve; 13. Chiller bypass regulating valve; 14. Pressure tank; 15. Test sample placement box; 16. Circulation pipeline; 17. Return pipe; 18. Air inlet pipe; 19. Drain pipe; 20. Diverter pipe; 21. First branch pipe; 22. Second branch pipe. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The sample inlet pressure gauge 4, sample outlet pressure gauge 5, sample outlet pressure gauge 6, and sample outlet total pressure gauge 11 mentioned below are all pressure gauges capable of reading pressure data from adjacent parts or equipment. The sample outlet control valve 9 and sample outlet control valve 10 are both control valves capable of adjusting or controlling the fluid flow rate in the pipeline. The sample outlet flow meter 7 and sample outlet flow meter 8 are both flow meters capable of reading fluid flow rate data from adjacent parts or equipment. The basic mechanisms of the aforementioned parts or equipment are known to those skilled in the art, and therefore will not be elaborated upon further.

[0020] Please see Figure 1-4 This utility model provides a flow resistance testing device, including a chiller 1, which can provide the temperature and flow rate required for sample testing.

[0021] The chiller 1 is connected to a return flow assembly on both sides. One end of the return flow assembly is connected to a return water pipe 17. The outer side of one end of the return water pipe 17 is connected to the chiller outlet valve 2. The middle of the return water pipe 17 is connected to a pressure tank 14. The pressure tank 14 can regulate the pressure pulsation generated by the water pump of the chiller 1 during operation by adjusting the pressure of the compressed air in the pressure tank 14.

[0022] The bottom of the pressure tank 14 is connected to an air supply component. The outer side of the return water pipe 17 away from the chiller 1 is connected to a sample inlet pressure gauge 4. The outer side of the return water pipe 17 away from the chiller 1 is connected to a test sample placement box 15. The test sample placement box 15 can be understood as a placement box with a multi-port connector. When the sample to be tested needs to be tested, the sample to be tested is placed inside the test sample placement box 15. The side of the test sample placement box 15 away from the return water pipe 17 is connected to a diversion component. The outer side of the diversion component is connected to a detection component. The outer side of the detection component away from the diversion component is connected to a drain pipe 19. The outer side of the drain pipe 19 is connected to a sample outlet detection component.

[0023] Furthermore, the reflux assembly includes a circulation pipeline 16, which forms a closed loop between the chiller 1, the testing equipment, and related components, allowing the coolant to circulate continuously and thus continuously remove the heat generated during the test, ensuring that the testing environment and equipment are in a stable temperature state. The circulation pipeline 16 is connected to both sides of the chiller 1, and a chiller bypass regulating valve 13 is connected in the middle of the circulation pipeline 16. The chiller bypass regulating valve 13 is a bypass regulating valve that can adjust the flow rate of coolant through the bypass pipeline according to actual needs, and can accurately regulate the flow rate of coolant and the system pressure, with high control accuracy.

[0024] Furthermore, the air supply component includes an air inlet pipe 18, which is connected to the bottom of the pressure tank 14. A compressed air regulating valve 3 is connected to the middle of the outer side of the air inlet pipe 18. When using the device, an external air compressor is connected to the end of the air inlet pipe 18 away from the pressure tank 14. The air compressor supplies air to the air inlet pipe 18, allowing air to enter the pressure tank 14. Different flow rates are precisely set to create conditions for obtaining accurate flow resistance data and to simulate airflow conditions under various actual working conditions.

[0025] Furthermore, the flow diversion assembly includes a diversion pipe 20, which is connected to one end of the drain pipe 19. The diversion pipe 20 is symmetrically connected to a first branch pipe 21 and a second branch pipe 22 on its outer side. The compressed air in the main pipeline is diverted to different branches in a certain proportion to conduct flow resistance tests on different test objects or under different test conditions. The diversion pipe 20 can provide a suitable and adjustable flow rate for each test object. By changing the opening of the diversion pipe 20 or using a combination of multiple diversion pipes 20 with different diameters, the flow rate entering each test branch can be precisely adjusted, which helps to simulate the flow resistance under different flow rates in actual working conditions and meet various test requirements. The diversion pipe 20 can flexibly adjust the flow rate to obtain comprehensive test data. In the flow resistance test, different test branches may have different flow resistances due to different test objects. The diversion pipe 20 can balance the pressure between the branches to a certain extent by reasonably distributing the flow rate.

[0026] Furthermore, the detection components include a pressure gauge 5 at sample outlet one, a pressure gauge 6 at sample outlet two, a flow meter 7 at sample outlet one, a flow meter 8 at sample outlet two, a control valve 9 at sample outlet one, and a control valve 10 at sample outlet two. The pressure gauge 6, flow meter 8, and control valve 10 at sample outlet two are sequentially connected to the outside of the first branch pipe 21, and the pressure gauge 5, flow meter 7, and control valve 9 at sample outlet one are sequentially connected to the outside of the second branch pipe 22. This allows for a direct and intuitive display of pressure values, enabling operators to quickly obtain flow and pressure information for timely adjustments and judgments.

[0027] Furthermore, the sample outlet detection component includes a sample outlet total pressure gauge 11 and a chiller return water valve 12. The sample outlet total pressure gauge 11 and the chiller return water valve 12 are connected to the outside of the drain pipe 19 near the chiller 1. In conjunction with the water supply valve of the chiller 1 and the piping of the entire cooling system, the return water valve can help balance the pressure in the cooling system. By reasonably adjusting the opening of the chiller return water valve 12, it is possible to avoid excessively high or low pressure in the cooling system, prevent problems such as pipe rupture or poor water flow, ensure the safe and stable operation of the cooling system, control the return water flow and pressure, help protect the chiller 1, and prevent overload or damage to the compressor, water pump and other components inside the chiller 1 due to excessive or insufficient return water flow, extend the service life of the chiller 1, and reduce maintenance costs.

[0028] When using this device, the sample to be tested is placed in the test sample placement box 15, and the flow chamber of the sample to be tested is connected to the internal multi-port connector. After the test begins, the chiller 1 drives the internal cooling material to flow in the return water pipe 17. At the same time, the flow rate of the chilled water flowing through the pipeline is regulated and controlled by the chiller bypass regulating valve 13. When the chilled water flows through the pressure tank 14, the pressure tank 14 is pre-filled with compressed air at a certain pressure to provide a stable pressure for the test object, ensuring that the flow resistance test is carried out under specific pressure conditions. The compressed air regulating valve 3 precisely controls the flow rate of the compressed air entering the test device. The sample inlet pressure gauge 4 detects the pressure at the sample inlet. After passing through the test sample placement box 15, the flow is divided into the first branch pipe 21 and the second branch pipe 22. The pressure is directly displayed by the sample outlet pressure gauge 5, sample outlet pressure gauge 6, sample outlet flow meter 7, sample outlet flow meter 8, sample outlet control valve 9, and sample outlet control valve 10. The current flow and pressure information is displayed. After the substances inside the first branch pipe 21 and the second branch pipe 22 are combined, they enter the drain pipe 19. The total pressure gauge 11 at the sample outlet displays the total pressure value at the sample outlet in real time. By reading the value of this pressure gauge, the operator can directly understand the pressure of the gas or fluid after passing through the sample and determine whether it is within the normal range. This provides key pressure data for flow resistance testing. The difference between the sample outlet pressure and the inlet pressure can reflect the flow resistance characteristics of the sample. When the inlet pressure is known, the reading of the total pressure gauge 11 at the sample outlet can help calculate the pressure drop across the sample and then analyze the degree of obstruction of the sample to the fluid flow. The greater the pressure drop, the greater the flow resistance of the sample, and vice versa. The chiller return valve 12 controls the amount of water returning from the chiller user end to the chiller 1, enabling flow resistance testing at temperatures of -40℃ to 110℃, flow rates of 0.1L to 25L / min, and pressures below 400kPa.

[0029] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flow resistance testing apparatus, comprising a chiller (1), characterized in that: The chiller (1) is connected to a return assembly on both sides. One end of the return assembly is connected to a return water pipe (17). The outside of one end of the return water pipe (17) is connected to a chiller outlet valve (2). The middle of the return water pipe (17) is connected to a pressure tank (14). The bottom of the pressure tank (14) is connected to an air supply assembly. The outside of the end of the return water pipe (17) away from the chiller (1) is connected to a sample inlet pressure gauge (4). The end of the return water pipe (17) away from the chiller (1) is connected to a test sample placement box (15). The side of the test sample placement box (15) away from the return water pipe (17) is connected to a diversion assembly. The outside of the diversion assembly is connected to a detection assembly. The end of the detection assembly away from the diversion assembly is connected to a drain pipe (19). The outside of the drain pipe (19) is connected to a sample outlet detection assembly.

2. The flow resistance testing apparatus according to claim 1, characterized in that: The reflux assembly includes a circulation pipe (16), which is connected to both sides of the chiller (1), and a chiller bypass regulating valve (13) is connected in the middle of the circulation pipe (16).

3. The flow resistance testing apparatus according to claim 1, characterized in that: The air supply assembly includes an air inlet pipe (18), which is connected to the bottom of the pressure tank (14), and a compressed air regulating valve (3) is connected to the middle of the outer side of the air inlet pipe (18).

4. The flow resistance testing apparatus according to claim 1, characterized in that: The diversion assembly includes a diversion pipe (20), which is connected to one end of the drain pipe (19). A first branch pipe (21) and a second branch pipe (22) are symmetrically connected to the outside of the diversion pipe (20).

5. The flow resistance testing apparatus according to claim 1, characterized in that: The detection assembly includes a sample outlet pressure gauge (5), a sample outlet pressure gauge (6), a sample outlet flow meter (7), a sample outlet flow meter (8), a sample outlet control valve (9), and a sample outlet control valve (10). The sample outlet pressure gauge (6), the sample outlet flow meter (8), and the sample outlet control valve (10) are sequentially connected to the outside of the first branch pipe (21), and the sample outlet pressure gauge (5), the sample outlet flow meter (7), and the sample outlet control valve (9) are sequentially connected to the outside of the second branch pipe (22).

6. The flow resistance testing apparatus according to claim 1, characterized in that: The sample outlet detection component includes a sample outlet total pressure gauge (11) and a chiller return valve (12), which are connected to the outside of the drain pipe (19) near the chiller (1).

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