Radiator heat dissipation performance comparison test device

Abstract

The utility model relates to the technical field of experimental equipment, in particular to a radiator heat dissipation performance comparison test device which comprises a water storage tank, a circulating pump I, a heating mechanism, a temperature sensor I, a high-level water tank, a low-level water tank, a temperature sensor II, a needle valve, a ball valve, a weighing scale, a measuring cylinder and a three-way valve, a first water outlet pipe is connected between the water storage tank and the high-level water tank, the first circulating pump, the heating mechanism and the first temperature sensor are connected to the first water outlet pipe, at least two second water outlet pipes are connected between the high-level water tank and the low-level water tank at the same horizontal height, and the radiator, the second temperature sensor, the needle valve and the ball valve which are located on the same second water outlet pipe form an experimental group. The low-position water tank is connected with a second overflow pipe used for discharging water to the measuring cylinder, the measuring cylinder is placed on the weighing scale, a water return pipe is connected between the second overflow pipe and the water storage tank, and the three-way valve is installed at the joint of the water return pipe and the second overflow pipe. The utility model has the effect that the flow passing through each group of radiators is stable and equal.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental equipment, in particular to a heat dissipation performance comparison test device for a radiator. Background Art

[0002] In order to improve the heat dissipation of the radiator, paint is usually applied on the surface of the radiator. With the continuous advancement of material science, people are also constantly trying to apply various new materials on the surface of the radiator to improve the heat dissipation performance of the radiator. In this exploration process, a comparative experiment is required, that is, when other test conditions are the same, different types of paint are applied on the same groups of radiators or the same type of material is adjusted in its composition ratio to test its effect on the heat dissipation effect.

[0003] The basic heat transfer relationship involved in the test principle is Q = cG (t1-t2), where Q is the heat (W) and c is the specific heat capacity (J / (kg·℃) 2 ), G is the mass flow rate (kg / s), t1 is the water inlet temperature (℃), and t2 is the water outlet temperature (℃). It can be seen from the above formula that when water is used as the medium, at the same ambient temperature, when the water inlet flow rate and water inlet temperature of each group of radiators are the same, the lower the water outlet temperature of the radiator, the greater the heat dissipation, indicating that the coating has a better effect on improving the heat dissipation performance of the radiator.

[0004] How to ensure that the flow through each group of radiators is equal is the key to ensuring the accuracy of the comparative experimental results. The commonly used method is to set regulating valves and ultrasonic flow meters on the branch pipes of each group of radiators, and adjust the opening of each valve to make the values ​​displayed by all ultrasonic flow meters the same.

[0005] This method seems simple but is actually difficult to operate because the radiators are connected in parallel. When the opening of a branch valve is adjusted, the impedance of the entire parallel loop will change, causing the flow of other pipelines to change accordingly. Utility Model Content

[0006] In order to make the flow rates passing through each group of radiators stable and equal, the utility model provides a radiator heat dissipation performance comparison test device.

[0007] The utility model provides a heat sink heat dissipation performance comparison test device adopts the following technical solution:

[0008] A radiator heat dissipation performance comparison test device is used to test the heat dissipation performance of the radiator, comprising a water tank, a circulation pump, a heating mechanism, a temperature sensor, a high-level water tank, a low-level water tank, a temperature sensor, a needle valve, a ball valve, a weighing scale, a measuring cylinder and a three-way valve. A water outlet pipe is connected between the water tank and the high-level water tank. The circulation pump, the heating mechanism and the temperature sensor are connected to the water outlet pipe. At least two water outlet pipes are connected at the same horizontal height between the high-level water tank and the low-level water tank. The radiator, the temperature sensor, the needle valve and the ball valve located on the same water outlet pipe are set as an experimental group. The low-level water tank is connected to an overflow pipe for draining water from the measuring cylinder. The measuring cylinder is placed on the weighing scale. A return pipe is connected between the overflow pipe and the water tank. The three-way valve is installed at the connection between the return pipe and the overflow pipe.

[0009] By adopting the above technical solution, the water inlet of the radiator is connected to a high-level water tank and the water outlet is connected to a low-level water tank. When the test device is running, the high-level water tank and the low-level water tank always keep an overflow state; when adjusting the flow, they are adjusted one by one in the order of the first experimental group, the second experimental group..., and the non-adjusted branches are in a closed state. Since the acting pressure and flow are the same when each branch is adjusted individually, the impedance of each branch is the same. Since the resistance of the water tank is negligible, it can be ensured that when the ball valves of all branches are opened, the flow through each radiator increases synchronously and the increased flow remains the same; the weighing method is used for measurement, and the results are more accurate than those of traditional flow meter measurement methods, and are not affected by flow field uniformity, water quality, etc.

[0010] Optionally, a water dispersion tube connected to a water outlet pipe is vertically arranged in the high-position water tank, the top of the water dispersion tube is closed and a plurality of water dispersion holes are opened on the peripheral wall.

[0011] By adopting the above technical solution, the outflow velocity is reduced, thereby reducing the impact of the outflow on the pressure stability at the water outlet at the bottom of the tank.

[0012] Optionally, an overflow pipe 1 is connected between the high-level water tank and the water storage tank.

[0013] The adoption of the above technical solution is conducive to the recycling of water resources.

[0014] Optionally, a water collecting tank 1 connected to an overflow pipe 1 is horizontally installed in the high-level water tank, and the water collecting tank 1 is made of a pipe fitting with the upper half cut off.

[0015] By adopting the above technical solution, the water collecting tank is set in the structural form of a rectangular horizontal weir, which is conducive to maintaining the stability of the liquid level in the low-level water tank.

[0016] Optionally, a water collecting tank 2 connected to overflow pipe 2 is horizontally installed in the low-level water tank, and the water collecting tank 2 is made of a pipe fitting with the upper half cut off.

[0017] By adopting the above technical solution, the water collecting tank 2 is set to a rectangular horizontal weir structure, which is conducive to maintaining the stability of the liquid level in the low-level water tank.

[0018] Optionally, the heating mechanism includes a plate heat exchanger and a constant temperature bath, the plate heat exchanger is connected to the water outlet pipe 1 and the constant temperature bath respectively, and an electric regulating valve and a circulating pump 2 are also arranged between the plate heat exchanger and the constant temperature bath.

[0019] By adopting the above technical solution, the heat exchange performance is stable and the operation is convenient.

[0020] Optionally, the diameter of the high-level water tank and the low-level water tank is four times the diameter of the remaining water delivery pipeline.

[0021] By adopting the above technical solution, the flow resistance is reduced by more than 99% under the same flow rate, reducing the impact of the high-level water tank and the low-level water tank on the water flow resistance.

[0022] Optionally, the number of the water dispersion holes is 208, and the diameter of the water dispersion holes is 5 mm.

[0023] By adopting the above technical solution, it was experimentally measured that the outflow area increased by 7.7 times and the outflow velocity was significantly reduced.

[0024] In summary, the present invention includes at least one of the following beneficial technical effects:

[0025] The water inlet of the radiator is connected to a high-level water tank, and the water outlet is connected to a low-level water tank. When the test device is running, the high-level water tank and the low-level water tank are always kept in an overflow state. When adjusting the flow, they are adjusted one by one in the order of the first experimental group, the second experimental group, etc. The non-adjusted branches are in a closed state. Since the pressure and flow rate of each branch are the same when adjusting each branch individually, the impedance of each branch is the same. Since the resistance of the water tank is negligible, it can be ensured that when the ball valves of all branches are opened, the flow through each radiator increases synchronously and the increased flow rate remains the same. The weighing method is used for measurement, which is more accurate than the traditional flow meter measurement method and is not affected by the uniformity of the flow field, water quality, etc.

[0026] The setting of the water dispersion tube and the water dispersion hole reduces the outflow velocity, thereby reducing the influence of the outflow on the pressure stability at the water outlet at the bottom of the tank;

[0027] Structures such as plate heat exchangers have stable heat transfer performance and are easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a heat dissipation performance comparison test device for a radiator according to an embodiment of the utility model.

[0029] Figure 2 It is a structural schematic diagram of a water dispersion tube according to an embodiment of the utility model.

[0030] Figure 3 It is a schematic structural diagram of the cooperation between a high-position water tank and a water collecting tank in an embodiment of the utility model.

[0031] Explanation of the reference numerals: 1. water storage tank; 10. outlet pipe 1; 11. return pipe; 12. circulation pump 1; 13. temperature sensor 1; 14. control valve; 2. heating mechanism; 20. plate heat exchanger; 21. constant temperature tank; 22. electric regulating valve; 23. circulation pump 2; 3. high-level water tank; 30. water dispersion tube; 300. water dispersion hole; 31. outlet pipe 2; 32. overflow pipe 1; 33. water collecting tank 1; 34. ball valve; 35. needle valve; 4. low-level water tank; 40. overflow pipe 2; 41. water collecting tank 2; 5. weighing scale; 50. measuring cylinder; 6. three-way valve; 7. radiator; 8. temperature sensor 2. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1 -Attached Figure 3 The utility model is described in further detail.

[0033] The utility model embodiment discloses a heat dissipation performance comparison test device for a radiator. Figure 1 The radiator heat dissipation performance comparison test device includes a water tank 1, a heating mechanism 2, a high-level water tank 3, a low-level water tank 4 and a weighing scale 5. A water outlet pipe 10 is connected between the bottom of the water tank 1 and the bottom of the high-level water tank 3, and a circulating pump 12, a temperature sensor 13 and a control valve 14 are installed on the water outlet pipe 10.

[0034] Reference Figure 1 The heating mechanism 2 is used to heat the water in the water outlet pipe 10 to the required temperature. The heating mechanism 2 is connected to the water outlet pipe 10. The heating mechanism 2 includes a plate heat exchanger 20 and a constant temperature tank 21. The plate heat exchanger 20 is connected to the water outlet pipe 10 and the constant temperature tank 21 respectively. The circulating pump 12 and the control valve 14 are located at the water inlet of the plate heat exchanger 20. The temperature sensor 13 is located at the water outlet of the plate heat exchanger 20. An electric regulating valve 22 and a circulating pump 23 are also installed between the constant temperature tank 21 and the plate heat exchanger 20. The temperature sensor 13 can be electrically connected to the electric regulating valve 22 to control the degree of opening of the electric regulating valve 22 to adjust the water temperature in the water outlet pipe 10.

[0035] Reference Figure 1 and Figure 2The top of the high-level water tank 3 is connected to the outside air. A water dispersion tube 30 is vertically installed in the high-level water tank 3. The bottom end of the water dispersion tube 30 is connected to the water outlet pipe 10. The water dispersion tube 30 is made of a DN32 stainless steel pipe. The top of the water dispersion tube 30 is closed and 208 water dispersion holes 300 with a diameter of 5 mm are opened on the surrounding wall. The outflow area is increased by 7.7 times through experiments, which greatly reduces the outflow speed, thereby reducing the influence of the outflow on the pressure stability at the water outlet at the bottom of the tank, and reducing the cost at the same time.

[0036] Reference Figure 1 At least two water outlet pipes 31 are connected between the bottom of the high water tank 3 and the bottom of the low water tank 4. The water inlet ends of all water outlet pipes 31 are at the same level, and the water outlet ends of all water outlet pipes 31 are at the same level. The radiator 7, the temperature sensor 8, the needle valve 35 and the ball valve 34 are installed in sequence on the water outlet pipe 31 from the high water tank 3 to the low water tank 4. The radiator 7, the temperature sensor 8, the needle valve 35 and the ball valve 34 installed on the same water outlet pipe 31 are set as an experimental group.

[0037] Reference Figure 1 and Figure 3 An overflow pipe 32 is connected between the top of the high-level water tank 3 and the top of the water storage tank 1, and a water collecting tank 33 connected to the overflow pipe 32 is horizontally installed in the high-level water tank 3. The water collecting tank 33 in this embodiment is made of a DN32 steel pipe with the upper half removed to form a rectangular horizontal weir structure, which is beneficial to maintaining the liquid level in the high-level water tank 3 stable. A liquid level meter (not shown in the figure) is also installed in the high-level water tank 3.

[0038] Reference Figure 1 The weighing scale 5 in this embodiment is a high-precision digital weighing scale, on which a measuring cylinder 50 is placed, the top of the low-level water tank 4 is connected to the outside air and the side wall thereof is connected to an overflow pipe 2 40 extending into the measuring cylinder 50, a return pipe 11 is connected between the overflow pipe 2 40 and the water storage tank 1, and a three-way valve 6 is installed at the connection between the return pipe 11 and the overflow pipe 2 40. A water collecting tank 2 41 connected to the overflow pipe 2 40 is also horizontally installed in the low-level water tank 4, and the structure of the water collecting tank 2 41 is the same as that of the water collecting tank 1 33, which will not be described here; the diameters of the high-level water tank 3 and the low-level water tank 4 in this embodiment are four times the diameters of the other water delivery pipelines, and the flow resistance is reduced by more than 99% under the same flow rate, so the resistance of the high-level water tank 3 and the low-level water tank 4 can be ignored.

[0039] The operating steps of the radiator heat dissipation performance comparison test device of the utility model embodiment are as follows: ① first connect multiple radiators 7 to the corresponding water outlet pipes 2 31, store enough water in the water tank 1, adjust the three-way valve 6 to the passage where water flows into the water tank 1, open the ball valve 34 in the first experimental group, and keep the water outlet pipes 2 31 of the other experimental groups in the closed state; ② open the circulation pump 12, adjust the control valve 14 to avoid large water flow fluctuations, observe the liquid level gauge in the high-level water tank 3, and make the high-level water tank 3 reach a stable overflow state; ③ open the weighing scale 5, adjust the three-way valve 6 to the passage where water flows into the measuring cylinder 50, adjust the needle valve 35 in the first experimental group, so that the mass flow on the display connected to the weighing scale 5 is stable at a certain value, set as m, and after the adjustment is completed Close the ball valve 34 in the experimental group; ④ open the ball valve 34 in the second experimental group, adjust the needle valve 35 of the branch until the mass flow on the display connected to the weighing scale 5 is displayed as m, and close the ball valve 34 of the branch. The adjustment method for the remaining experimental groups is to repeat this step; ⑤ After the flow adjustment of all experimental groups is completed, fully open the ball valves 34 in all experimental groups, and adjust the three-way valve 6 to the passage for water to enter the water storage tank 1; ⑥ Open the circulating pump 23 and the thermostatic bath 21, set the outlet temperature value of the plate heat exchanger 20, and when the outlet temperature reaches the set value, read the value of the temperature sensor 28 in each experimental group; ⑦ Adjust the outlet temperature setting value of the plate heat exchanger 20. Repeat the experiment to obtain the influence of the coating on the heat dissipation performance of the radiator 7 under different water supply temperatures.

[0040] This test device is designed as an open system. The water inlet of the radiator 7 is connected to a high-level water tank 3 and the water outlet is connected to a low-level water tank 4. When the test device is running, the high-level water tank 3 and the low-level water tank 4 always maintain an overflow state. When adjusting the flow rate, adjust them one by one in the order of the first experimental group, the second experimental group..., and the non-adjusted branches are in a closed state. Since the acting pressure and flow rate are the same when each branch is adjusted separately, the impedance of each branch is the same. Since the resistance of the water tank is negligible, it can be ensured that when the ball valves 34 of all branches are opened, the flow through each radiator 7 increases synchronously and the increased flow rate remains the same. Compared with the traditional flow meter measurement method, the measurement using the weighing method is more accurate and is not affected by the uniformity of the flow field, water quality, etc. By placing this test device in an enthalpy difference chamber, the influence of the coating on the heat dissipation performance of the radiator 7 under different water supply temperatures and indoor temperatures can also be studied.

[0041] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A heat sink heat dissipation performance comparison test device, used to test the heat dissipation performance of a heat sink, characterized by: The invention comprises a water storage tank (1), a circulation pump (12), a heating mechanism (2), a temperature sensor (13), a high-position water tank (3), a low-position water tank (4), a second temperature sensor (8), a needle valve (35), a ball valve (34), a weighing scale (5), a measuring cylinder (50) and a three-way valve (6); a water outlet pipe (10) is connected between the water storage tank (1) and the high-position water tank (3); a circulation pump (12), a heating mechanism (2) and a temperature sensor (13) are connected to the water outlet pipe (10); and a water outlet pipe (10) is connected between the high-position water tank (3) and the low-position water tank (4). At least two water outlet pipes (31) are connected at the same level, and a radiator (7), a temperature sensor (8), a needle valve (35) and a ball valve (34) located on the same water outlet pipe (31) are set as an experimental group. An overflow pipe (40) for draining water from a measuring cylinder (50) is connected to the low-level water tank (4), and the measuring cylinder (50) is placed on a weighing scale (5). A return pipe (11) is connected between the overflow pipe (40) and the water storage tank (1), and a three-way valve (6) is installed at the connection between the return pipe (11) and the overflow pipe (40).

2. The heat dissipation performance comparison test device of a radiator according to claim 1, characterized in that: A water dispersion tube (30) connected to the water outlet pipe (10) is vertically arranged in the high-position water tank (3). The top of the water dispersion tube (30) is closed and a plurality of water dispersion holes (300) are opened on the peripheral wall.

3. The heat dissipation performance comparison test device of a radiator according to claim 1, characterized in that: An overflow pipe 1 (32) is connected between the high-level water tank (3) and the water storage tank (1).

4. The heat dissipation performance comparison test device of a radiator according to claim 3, characterized in that: A water collecting tank (33) connected to an overflow pipe (32) is horizontally installed in the high-position water tank (3). The water collecting tank (33) is made of a pipe with the upper half cut off.

5. The heat dissipation performance comparison test device of a radiator according to claim 1, characterized in that: A second water collecting tank (41) connected to a second overflow pipe (40) is horizontally installed in the low-level water tank (4), and the second water collecting tank (41) is made of a pipe fitting with the upper half cut off.

6. The heat dissipation performance comparison test device of a radiator according to claim 1, characterized in that: The heating mechanism (2) comprises a plate heat exchanger (20) and a thermostatic bath (21). The plate heat exchanger (20) is connected to the water outlet pipe (10) and the thermostatic bath (21) respectively. An electric regulating valve (22) and a circulating pump (23) are also provided between the plate heat exchanger (20) and the thermostatic bath (21).

7. The heat dissipation performance comparison test device of a radiator according to claim 1, characterized in that: The diameters of the high-position water tank (3) and the low-position water tank (4) are four times the diameters of the remaining water delivery pipelines.

8. The heat dissipation performance comparison test device of a radiator according to claim 2, characterized in that: The number of the water-spreading holes (300) is 208, and the diameter of the water-spreading holes (300) is 5 mm.

Images