Testing device of thermoelectric generator

Abstract

The testing device comprises a constant-temperature water tank, a main pipeline, a constant-temperature heating table and a branch pipeline, a circulating pump, a flow meter and a heat exchanger are arranged on the main pipeline, the two ends of the main pipeline are connected with an inlet and an outlet of the constant-temperature water tank respectively, and the constant-temperature heating table is arranged below the heat exchanger. And a thermoelectric generator is arranged between the heat exchanger and the constant-temperature heating table. Flow and flow velocity in the heat exchanger can be adjusted, so that the heat exchanger rapidly reaches a heat balance state.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, and more specifically, to a testing device for a temperature difference generator. Background Art

[0002] A thermoelectric generator is a device that uses temperature differences to generate electrical energy. In order to determine the performance of each thermoelectric generator, it is necessary to test it, including testing the electrical energy output of the thermoelectric generator under different temperature differences. During the test, the temperature difference needs to be kept constant to ensure the readiness of the test results and avoid errors in the test. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and provide a testing device for a temperature difference generator.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model discloses a testing device for a temperature difference generator, comprising a constant temperature water tank, a main pipeline, a constant temperature heating platform, and a branch pipeline. A circulation pump, a flow meter, and a heat exchanger are arranged on the main pipeline. Two ends of the main pipeline are respectively connected with an inlet and an outlet of the constant temperature water tank. The constant temperature heating platform is arranged below the heat exchanger. A temperature difference generator is arranged between the heat exchanger and the constant temperature heating platform. One end of the branch pipeline is connected with the main pipeline, and the other end is connected with the inlet of the constant temperature water tank. A regulating valve is arranged on the branch pipeline.

[0006] Furthermore, the branch pipeline is connected to the main pipeline via a tee, and the tee is arranged on the main pipeline between the circulation pump and the flow meter.

[0007] Furthermore, the main line includes pipeline 1, pipeline 2, pipeline 3 and pipeline 4. One end of pipeline 1 is connected to the outlet of the constant temperature water tank, and the other end is connected to the inlet of the circulation pump. One end of pipeline 2 is connected to the outlet of the circulation pump, and the other end is connected to the inlet of the flow meter. One end of pipeline 3 is connected to the outlet of the flow meter, and the other end is connected to the inlet of the heat exchanger. One end of pipeline 4 is connected to the outlet of the heat exchanger, and the other end is connected to the inlet of the constant temperature water tank.

[0008] Further, the inlet and the outlet of the heat exchanger are located on two opposite sides.

[0009] Furthermore, a tee is installed on the second pipeline.

[0010] Furthermore, it also includes a support platform, a constant temperature heating platform is arranged on the support platform, an adjustable electronic load meter is arranged on the support platform, and the adjustable electronic load meter is electrically connected to the temperature difference generator.

[0011] Furthermore, a notch is provided in the middle of the support platform, a support plate is arranged in the notch, the constant temperature heating platform is installed on the support plate, a support block is installed on the support platform, a screw rod is rotatably provided between the support block and the support platform, a driving mechanism is provided on the support block, the driving mechanism can drive the screw rod to rotate, a screw rod nut is provided on the screw rod, a support arm is installed on the screw rod nut, a positioning groove is provided at the lower part of the support plate, and the upper end of the support arm can be inserted into the positioning groove.

[0012] Furthermore, a support frame is connected to the inner side of the support block, a guide rail is arranged on the upper part of the support frame, a guide groove is opened on the lower part of the support plate, and the guide groove and the guide rail are arranged opposite to each other up and down.

[0013] The beneficial effect of the utility model is that the total flow of the circulation pump is certain, and the flow and flow rate of the main pipeline can be indirectly controlled by the regulating valve on the branch pipeline, thereby adjusting the flow rate inside the heat exchanger, allowing the heat exchanger surface to quickly reach a thermal equilibrium state and maintain a constant temperature, thereby preparing for the subsequent detection of the temperature difference generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure of a test device for a thermoelectric generator in this embodiment;

[0015] Figure 2 Schematic diagram of the structure of the support platform in this embodiment.

[0016] Figure numerals: 1. Constant temperature water tank; 2. Circulation pump; 3. Main pipeline; 4. Heat exchanger; 5. Flow meter; 6. Constant temperature heating table; 7. Temperature difference generator; 8. Branch pipeline; 9. Control valve; 10. Adjustable electronic load meter; 11. Support table; 12. Pipeline one; 13. Pipeline two; 14. Pipeline three; 15. Pipeline four; 16. Tee; 17. Support seat; 18. Notch; 19. Support plate; 20. Guide groove; 21. Support block; 22. Screw rod; 23. Drive motor; 24. Screw nut; 25. Support arm; 26. Support frame; 27. Guide rail; 28. Mounting plate; 29. ​​Cylinder; 30. Push block; 31. Rubber block; 32. Fixing sleeve; 33. Positioning groove. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] As attached Figure 1 -Attached Figure 2As shown, a test device for a temperature difference generator includes a constant temperature water tank 1, a main pipe 3, a constant temperature heating platform 6, and a branch pipe 8. The main pipe 3 is provided with a circulation pump 2, a flow meter 5, and a heat exchanger 4. The two ends of the main pipe 3 are respectively connected to the inlet and outlet of the constant temperature water tank 1. The constant temperature heating platform 6 is arranged below the heat exchanger 4. A temperature difference generator 7 is arranged between the heat exchanger 4 and the constant temperature heating platform 6. One end of the branch pipe 8 is connected to the main pipe 3, and the other end is connected to the inlet of the constant temperature water tank 1. A regulating valve 9 is arranged on the branch pipe 8. The branch pipe 8 is connected to the main pipe 3 through a tee 16, and the tee 16 is arranged on the main pipe 3 between the circulation pump 2 and the flow meter 5. The main line 3 includes pipeline 1 12, pipeline 2 13, pipeline 3 14 and pipeline 4 15. One end of pipeline 12 is connected to the outlet of the constant temperature water tank 1, and the other end is connected to the inlet of the circulation pump 2. One end of pipeline 2 13 is connected to the outlet of the circulation pump 2, and the other end is connected to the inlet of the flow meter 5. One end of pipeline 3 14 is connected to the outlet of the flow meter 5, and the other end is connected to the inlet of the heat exchanger 4. One end of pipeline 4 15 is connected to the outlet of the heat exchanger 4, and the other end is connected to the inlet of the constant temperature water tank 1. The tee 16 is installed on pipeline 2 13.

[0019] Thermoelectric generator 7 is installed between heat exchanger 4 and constant temperature heating platform 6, with heat exchanger 4 as a cold source and constant temperature heating platform 6 as a heat source. Thermal conductive silica gel should be evenly applied between heat exchanger 4 and thermoelectric generator 7, and between thermoelectric generator 7 and constant temperature heating platform 6. The side of thermoelectric generator 7 in contact with heat exchanger 4 is a cold side, and the side of thermoelectric generator 7 in contact with constant temperature heating platform 6 is a hot side.

[0020] When the thermoelectric generator 7 is working, in order to keep the temperature difference between the hot surface and the cold surface of the thermoelectric generator 7 in a constant state, heat should be continuously supplied to the hot surface, while heat should be continuously discharged from the cold surface. Part of the heat supplied by the hot surface is absorbed as Peltier heat, and the other part is transferred to the cold surface through heat conduction. The discharged heat should be the sum of the Peltier heat released by the cold surface and the heat conducted from the hot surface. In order to achieve the above-mentioned thermal equilibrium state of the cold and hot surfaces, the constant temperature heating table needs to be in a warming state at any time (when the temperature of the hot surface is 0.2°C lower than the set temperature, the constant temperature heating table will receive a signal to continue heating to ensure that the temperature of the hot surface is in a thermal equilibrium state), and the heat exchanger 4 must take away the heat conducted by the thermoelectric generator 7 at any time, which requires the surface of the heat exchanger 4 to be in a thermal equilibrium state.

[0021] Specifically, a required temperature is set for the constant temperature water tank 1;

[0022] Start the circulation pump 2 to allow the coolant in the constant temperature water tank 1 to fill the entire system loop;

[0023] When the thermostatic water tank 1 is cooled to the set temperature, the regulating valve 9 in the branch pipe 8 is adjusted to control the flow rate and flow rate in the heat exchanger 4, and timely take away the heat conducted by the thermoelectric generator 7, so that the surface of the heat exchanger 4 is in a thermal equilibrium state, and the two sides of the thermoelectric generator 7 are kept in a constant temperature difference state, and the characteristic curve of the power generation of the thermoelectric generator 7 changing with the temperature difference is tested.

[0024] Furthermore, the inlet and the outlet of the heat exchanger 4 are located on two opposite sides.

[0025] Furthermore, it also includes a support platform 11, a constant temperature heating platform 6 is arranged on the support platform 11, an adjustable electronic load meter 10 is arranged on the support platform 11, the adjustable electronic load meter 10 is electrically connected to the temperature difference generator 7, and the adjustable electronic load meter 10 can consume the generated electricity and can also record the voltage, current and other parameters of the generator. The power-load variation characteristic curve can be tested under constant temperature difference to track the highest efficiency point.

[0026] Furthermore, a notch 18 is provided in the middle of the support platform 11, a support plate 19 is provided in the notch 18, the constant temperature heating platform 6 is mounted on the support plate 19, a support block 21 is provided on the support platform 11, a screw 22 is rotatably provided between the support block 21 and the support platform 11, a driving mechanism is provided on the support block 21, the driving mechanism can drive the screw 22 to rotate, a screw nut 24 is provided on the screw 22, a support arm 25 is installed on the screw nut 24, a positioning groove 33 is provided at the lower part of the support plate 19, and the upper end of the support arm 25 can be inserted into the positioning groove 33. The support arm 25 is inserted into the positioning groove 33 to support the support plate 19, and the support plate 19 supports the constant temperature heating platform 6, so that the upper and lower end surfaces of the temperature difference generator 7 can fit with the bottom of the heat exchanger 4 and the upper part of the constant temperature heating platform 6 respectively. When a different thermoelectric generator 7 needs to be replaced for testing, the screw rod 22 is driven to rotate by the driving mechanism, so that the screw nut 24 moves downward along the screw rod 22, so that the support arm 25 lowers the support plate 19. The constant temperature heating table 6 and the thermoelectric generator 7 on the support plate 19 are lowered, so that the thermoelectric generator 7 and the heat exchanger 4 are separated from each other, so that the thermoelectric generator 7 can be driven to be replaced.

[0027] Furthermore, the driving mechanism is a driving motor 23, and the motor shaft of the driving motor 23 and the screw rod 22 are transmitted by means of a sprocket and a chain belt. Sprockets are installed on the motor shaft of the driving motor 23 and the screw rod 22, and a chain belt is connected between the two sprockets.

[0028] Furthermore, a support frame 26 is connected to the inner side of the support block 21, a guide rail 27 is arranged on the upper part of the support frame 26, and a guide groove 20 is opened at the lower part of the support plate 19, and the guide groove 20 and the guide rail 27 are arranged opposite to each other up and down. The support frame 26 is used to support the descending support plate 19, so that the constant temperature heating table 6 and the thermoelectric generator 7 can completely reach the bottom of the support table 11, thereby reducing the obstruction of the heat exchanger 4 and facilitating the replacement of the thermoelectric generator 7. When the support plate 19 descends onto the support frame 26, the guide rail 27 can be inserted into the guide groove 20, thereby limiting the support plate 19.

[0029] Furthermore, a mounting plate 28 is provided at the rear side of the support platform 11, a cylinder 29 is provided at the front side of the mounting plate 28, a push block 30 is connected to the front end of the piston rod of the cylinder 29, and a rubber block 31 is provided at the front side of the push block 30. When the support plate 19 reaches the support frame 26, the screw nut 24 will continue to drop a distance, so that the upper end of the support arm 25 is separated from the guide groove 20. At this time, the cylinder 29 controls the extension of its piston rod, and can push the support plate 19 forward through the push block 30. The rubber block 31 can play a protective role, and protects the surfaces of the push block 30 and the support plate 19.

[0030] Furthermore, pipeline three 14 and pipeline four 15 are both installed with a fixing sleeve 32, and the lower part of the fixing sleeve 32 is connected to a support seat 17, and the lower end of the support seat 17 is fixedly installed on the support platform 11. Pipe three 14 and pipeline four 15 are supported by the support seat 17 and the fixing sleeve 32, thereby effectively supporting the heat exchanger 4.

[0031] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A test device for a thermoelectric generator, characterized in that: The invention comprises a constant temperature water tank (1), a main pipe (3), a constant temperature heating platform (6), and a branch pipe (8); the main pipe (3) is provided with a circulation pump (2), a flow meter (5), and a heat exchanger (4); the two ends of the main pipe (3) are respectively connected to the inlet and outlet of the constant temperature water tank (1); the constant temperature heating platform (6) is arranged below the heat exchanger (4); a temperature difference generator (7) is arranged between the heat exchanger (4) and the constant temperature heating platform (6); one end of the branch pipe (8) is connected to the main pipe (3), and the other end is connected to the inlet of the constant temperature water tank (1); and a regulating valve (9) is arranged on the branch pipe (8).

2. A test device for a thermoelectric generator according to claim 1, characterized in that: The branch pipeline (8) is connected to the main pipeline (3) via a tee (16), and the tee (16) is arranged on the main pipeline (3) between the circulation pump (2) and the flow meter (5).

3. A test device for a thermoelectric generator according to claim 2, characterized in that: The main pipeline (3) comprises pipeline 1 (12), pipeline 2 (13), pipeline 3 (14) and pipeline 4 (15); one end of pipeline 1 (12) is connected to the outlet of the thermostatic water tank (1), and the other end is connected to the inlet of the circulation pump (2); one end of pipeline 2 (13) is connected to the outlet of the circulation pump (2), and the other end is connected to the inlet of the flow meter (5); one end of pipeline 3 (14) is connected to the outlet of the flow meter (5), and the other end is connected to the inlet of the heat exchanger (4); one end of pipeline 4 (15) is connected to the outlet of the heat exchanger (4), and the other end is connected to the inlet of the thermostatic water tank (1).

4. The testing device for a thermoelectric generator according to claim 1, characterized in that: The inlet and outlet of the heat exchanger (4) are located on two opposite sides.

5. The testing device for a thermoelectric generator according to claim 3, characterized in that: The tee (16) is installed on the second pipeline (13).

6. A test device for a thermoelectric generator according to claim 1, characterized in that: It also comprises a support platform (11), the constant temperature heating platform (6) is arranged on the support platform (11), an adjustable electronic load instrument (10) is arranged on the support platform (11), and the adjustable electronic load instrument (10) is electrically connected to the temperature difference generator (7).

7. A test device for a thermoelectric generator according to claim 6, characterized in that: A notch (18) is provided in the middle of the support platform (11), a support plate (19) is arranged in the notch (18), the constant temperature heating platform (6) is mounted on the support plate (19), a support block (21) is mounted on the support platform (11), a screw rod (22) is rotatably arranged between the support block (21) and the support platform (11), a driving mechanism is provided on the support block (21), the driving mechanism can drive the screw rod (22) to rotate, a screw rod nut (24) is provided on the screw rod (22), a support arm (25) is mounted on the screw rod nut (24), a positioning groove (33) is provided at the lower part of the support plate (19), and the upper end of the support arm (25) can be inserted into the positioning groove (33).

8. A test device for a thermoelectric generator according to claim 7, characterized in that: The inner side of the support block (21) is connected to a support frame (26), the upper part of the support frame (26) is provided with a guide rail (27), the lower part of the support plate (19) is provided with a guide groove (20), and the guide groove (20) and the guide rail (27) are arranged opposite to each other in the upper and lower parts.

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