Integrated thermoelectric conversion device testing device

Abstract

The invention belongs to the technical field of nuclear power, and particularly relates to an integrated thermoelectric conversion device testing device. According to the integrated thermoelectric device testing device provided by the invention, an inert gas and vacuum oxygen-free testing environment can be provided; and the test requirements of thermoelectric devices with the sizes of 100mm * 100mm and below are met. The controller controls the servo electric cylinder to apply pressure to the thermoelectric device, so that the stability of the internal resistance and thermal resistance of the tested thermoelectric device can be maintained, and meanwhile, the limit withstand pressure of the thermoelectric device can be tested; field vibration environments with various frequencies can be simulated through the vibration exciter; when the temperature of the hot end of the thermoelectric device reaches the temperature required by the test and the temperatures of the hot end and the cold end are constant, the resistance value of the programmable electronic load is changed through the controller, the voltage and the current of the programmable electronic load are read and recorded, and the conversion efficiency of the thermoelectric device is determined according to the recorded parameter values such as the voltage, the current, the temperature and the flow. The device is comprehensive in testing function and wide in application prospect.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear power, and in particular relates to an integrated thermoelectric conversion device testing device. Background Art

[0002] Thermoelectric devices can be used not only for refrigeration but also for power generation. They are widely used in the fields of medicine, communication, electricity, and waste heat utilization. The performance of thermoelectric devices directly determines the performance of refrigeration or power generation of related devices. Therefore, it is particularly important to test the performance of thermoelectric devices.

[0003] At present, the test device disclosed by the Institute of Materials of the China Academy of Engineering Physics mainly tests thermoelectric devices of 10mm*10mm-100mm*100mm, with a maximum temperature difference of 650℃, and can provide a vacuum environment. The test device disclosed by Zhejiang University uses a temperature controller to control the temperature and a gas mass flow controller (MFC) in conjunction with a vacuum pump to provide a vacuum environment. The test device disclosed by the Shanghai Institute of Ceramics, Chinese Academy of Sciences, introduces a pressurized platform that can accurately adjust the pressure applied to the thermoelectric device. The domestic thermoelectric device test device can only measure a limited range of thermoelectric devices, and the pressure applied to the thermoelectric device is small, so it does not have the function of testing the ultimate withstand pressure of the thermoelectric device. Moreover, the existing test devices are all static tests, which cannot simulate the vibration environment when the thermoelectric device is used on site. In view of this, there is an urgent need for a more comprehensive thermoelectric conversion device test device. Summary of the invention

[0004] In order to overcome the problems existing in the related art, an integrated thermoelectric conversion device testing device is provided, the device comprising: a thermoelectric device to be tested, a heating device, a cooling device, an excitation device, an electric pressurizing device, a vacuum device and a measurement and control device;

[0005] The vacuum device includes a vacuum box and a stage; the frame is placed on the upper surface of the table, and the vacuum box is placed inside the frame; the air inlet device is connected to the vacuum box through the air inlet hole, and is used to inject inert gas into the vacuum box; the vacuum pump is connected to the vacuum box through the air extraction hole, and is used to establish a vacuum environment that meets preset conditions in the vacuum box; the stage is arranged at the bottom of the vacuum box, and a water cooling block, a heat conducting block, a thermoelectric device, a heat conducting copper block, and a ceramic heating plate are placed on the upper surface of the stage from bottom to top in sequence;

[0006] The electric pressurizing device includes a servo electric cylinder and a pressure sensor; the servo electric cylinder is arranged on the top of the frame, the bottom end of the telescopic rod of the servo electric cylinder passes through the frame and the vacuum box, the bottom end of the telescopic rod is connected to the pressure sensor, and the servo electric cylinder can drive the telescopic rod to drive the pressure sensor to apply pressure to the thermoelectric device;

[0007] The excitation device includes an exciter, a push rod, and a mounting bracket. The exciter is fixed to the lower surface of the table through the mounting bracket. The push rod is led out from the exciter, passes through the lower platform and contacts the stage, so as to transmit the vibration of the exciter to the thermoelectric device.

[0008] The heating device includes a DC power supply, a temperature controller, and a ceramic heating plate; the DC power supply is connected to the ceramic heating plate through a cable aviation plug, so as to make the ceramic heating plate generate heat, and transfer the heat to the thermoelectric device through the heat-conducting copper block;

[0009] The cooling device includes a water chiller, a flow meter 30, a temperature sensor and a water cooling block; the water cooling block is connected to the water chiller through a hose via a water inlet and outlet hole, and the water cooling block is used to establish a stable cold end temperature for the thermoelectric device; the flow meter 30 is used to monitor the flow of the water chiller, and the temperature sensor is used to detect the temperature of the water inlet and outlet of the water cooling block;

[0010] The measurement and control device is used to control the operation of the heating device, cooling device, vibration device, electric pressurizing device and vacuum device.

[0011] In one possible implementation, the gap between the telescopic rod and the vacuum box is sealed by a stuffing box dynamic sealing assembly to ensure a sealing effect; the stuffing box dynamic sealing assembly includes a stuffing box, a pressure cover and connecting bolts, the stuffing box is filled in the position between the top opening and the telescopic rod, and the pressure cover is tightened by bolts to tighten the stuffing box.

[0012] In a possible implementation, a through hole is provided at the bottom of the vacuum box for placing the stage; the stage and the through hole are clearance-matched, and an O-ring is used between the stage and the through hole to form a static sealing connection.

[0013] In a possible implementation, the measurement and control device includes a controller, an industrial computer, and a programmable electronic load;

[0014] The controller is connected to the DC power supply and the temperature controller for communication. The controller can read the output voltage and output current of the DC power supply and set the heating target temperature of the temperature controller. The temperature controller detects the temperature of the heat-conducting copper block through a thermocouple and controls the DC power supply according to the detected temperature to reach the temperature required for the test and maintain the test temperature stable.

[0015] The controller controls the start and stop of the chiller and the water delivery rate according to the temperature detected by the temperature sensor and the flow detected by the flow meter 30, so that the water cooling block reaches and maintains the target cooling temperature;

[0016] The controller is connected to the electric cylinder and the pressure sensor of the pressurizing device respectively, and applies a preset pressure to the electric cylinder according to the pressure data collected by the pressure sensor;

[0017] The controller is connected to the vacuum measuring instrument and the vacuum pump in the vacuum box respectively, and controls the vacuum pump to establish a vacuum environment that meets the preset conditions in the vacuum box according to the vacuum degree parameters collected by the vacuum measuring instrument;

[0018] The controller is connected to the programmable electronic load for communication, and is used to set the resistance value of the programmable electronic load and read the voltage and current collected by the programmable electronic load; the programmable electronic load is connected to the thermoelectric device through the cable aviation plug to measure the output voltage and output current of the thermoelectric device;

[0019] The industrial computer is connected to the controller of the vibration device to set the parameters of the vibration device;

[0020] The industrial computer is connected to the controller for communication, and various control parameters of the controller can be set and read on the control interface of the industrial computer.

[0021] In a possible implementation, a temperature measuring hole is opened in the middle of the thermal conductive copper block; temperature measuring holes are opened at the top, middle and bottom of the thermal conductive block respectively, the hole spacing is not greater than 40 mm, and a temperature sensor is arranged in each temperature measuring hole.

[0022] In one possible implementation, a flow meter is provided on the pipeline between the water-cooling block and the chiller to measure the flow rate of cold water; a first platinum resistor is provided at the water inlet of the water-cooling block to measure the temperature of the water inlet of the water-cooling block; a second platinum resistor is provided at the water outlet of the water-cooling block to measure the temperature of the water outlet of the water-cooling block.

[0023] In a possible implementation, a first mica heat insulation board is placed between the water cooling block and the stage, and a second mica heat insulation board is placed on the top of the ceramic heating plate.

[0024] In one possible implementation, when the hot end temperature of the thermoelectric device reaches the required test temperature and the hot and cold end temperatures are constant, the resistance of the programmable electronic load is changed by the controller, and the voltage and current of the programmed electronic load and the hot and cold end temperatures of the thermoelectric device are read and recorded to determine the electrical performance, maximum temperature difference and cooling efficiency of the thermoelectric device.

[0025] The beneficial effects of the present disclosure are: the integrated thermoelectric device test device provided by the present disclosure can provide an inert gas and vacuum oxygen-free test environment; meet the test requirements of thermoelectric devices. The controller controls the servo electric cylinder to apply pressure to the thermoelectric device, which can maintain the stability of the internal resistance and thermal resistance of the thermoelectric device under test, and at the same time can test the ultimate tolerance pressure of the thermoelectric device; the exciter can simulate the field vibration environment of multiple frequencies; when the temperature of the hot end of the thermoelectric device reaches the test requirement temperature, and the temperature of the hot end and the cold end is constant, the resistance value of the programmable electronic load is changed by the controller, and the voltage and current of the programmed electronic load are read and recorded, and the conversion efficiency of the thermoelectric device when generating electricity is determined according to the recorded voltage, current, temperature, flow and other parameter values. The integrated thermoelectric device test device provided by the present disclosure can provide variable voltage and measure current for the thermoelectric device under test, draw IV curves, record the temperature of the hot end and cold end of the thermoelectric device, and determine the electrical performance, maximum temperature difference and cooling efficiency of the thermoelectric device. The device test function of the present disclosure is comprehensive and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of an integrated thermoelectric conversion device testing device shown in an embodiment of the present disclosure.

[0027] Figure 2 It is a schematic diagram of the sealing between the vacuum box and the telescopic rod of the servo electric cylinder shown in the embodiment of the present disclosure.

[0028] Figure 3 It is a schematic diagram of the sealing between the vacuum box and the device carrier shown in the embodiment of the present disclosure.

[0029] Figure 4 It is a schematic diagram of a heating device shown in an embodiment of the present disclosure.

[0030] Figure 5 It is a schematic diagram of a cooling device shown in an embodiment of the present disclosure.

[0031] Figure 6 It is a schematic diagram of a measurement and control device shown in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0032] The present disclosure is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Unless otherwise defined, the technical and scientific terms used in the present disclosure have the same meanings as those generally understood by those skilled in the art to which the present disclosure belongs; the terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure; the term "including" and any variations thereof in the present disclosure are intended to cover non-exclusive inclusions. Obviously, the embodiments described in the present disclosure are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative efforts are within the scope of protection of the present disclosure.

[0034] Reference to "embodiments" in this disclosure means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the disclosure. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] Figure 1 is a schematic diagram of an integrated thermoelectric conversion device testing device shown in an embodiment of the present disclosure, such as Figure 1 As shown, the device includes a thermoelectric device 7, a heating device, a cooling device, an excitation device, an electric pressurizing device, a measurement and control device and a vacuum device.

[0036] like Figure 1 As shown, the vacuum device includes a vacuum box 1 and a stage 2; an upper platform 11, a plurality of intermediate columns 12 and a lower platform 13 constitute a frame, the upper platform 11 is located at the top of the frame, the intermediate columns 12 are evenly distributed and supported on the side of the frame, the lower platform 13 is located at the bottom of the frame, the frame is placed on the upper surface of the desktop 27, and the vacuum box 1 is placed in the frame, located on the upper surface of the lower platform 13.

[0037] The electric pressurizing device includes a servo electric cylinder 8 and a pressure sensor 10; the servo electric cylinder 8 is arranged on the top of the frame, and the telescopic rod 9 of the servo electric cylinder 8 passes through the upper platform 11 and the vacuum box 1. The end of the telescopic rod 9 located in the vacuum box 1 is connected to the pressure sensor 10. The servo electric cylinder 8 can drive the telescopic rod 9 to drive the pressure sensor 10 to press against the second mica insulation board 37 to apply pressure to the thermoelectric device 7. The pressure sensor 10 is used to accurately measure the pressure applied to the thermoelectric device 7, thereby ensuring the stability of the internal resistance of the thermoelectric device.

[0038] like Figure 2As shown, the gap between the telescopic rod 9 and the vacuum box 1 is sealed by a stuffing box dynamic seal assembly to ensure the sealing effect. The stuffing box dynamic seal assembly includes a stuffing 18, a gland 20 and a connecting bolt 19. The stuffing 18 is filled in the position between the top opening and the telescopic rod 9, and the gland 20 is pressed by the bolt 19 to tighten the stuffing 18.

[0039] like Figure 3 As shown, a through hole is provided at the bottom of the vacuum box 1 for placing the stage 2. The stage 2 is fitted with a clearance in the through hole, and a fixing bolt is provided on the stage 2 to connect with the lower platform 13. An O-ring 21 is used between the stage 2 and the lower platform 12 to form a static sealing connection, which not only ensures the sealing effect of the vacuum box, but also enables the stage 2 to move relative to the vacuum box 1, while avoiding the vibration of the stage being transmitted to the entire device.

[0040] The first mica heat insulation board 26, the water cooling block 24, the heat conducting block 25, the thermoelectric device 7, the heat conducting copper block 23, the ceramic heating plate 22 and the second mica heat insulation board 37 are placed on the upper surface of the stage 2 in order from bottom to top.

[0041] The excitation device includes an exciter 16, a push rod 17, a mounting bracket 14 and an elastic gasket 15; the mounting bracket 14 is fixed to the lower surface of the table 27, and the exciter 16 is fixed inside the mounting bracket 14 through the elastic gasket 15. The push rod 17 is led out from the exciter 16, passes through the lower platform 13 and contacts the stage 2, so as to transmit the vibration of the exciter 16 to the thermoelectric device 7, simulating the on-site vibration environment.

[0042] The vacuum box 1 is connected to the air intake device through the air intake hole 3, and the air intake device is used to inject inert gas into the interior of the vacuum box 1; the vacuum box 1 is connected to the vacuum pump through the exhaust hole 6, and the vacuum pump is used to extract the gas inside the vacuum box 1 to establish a vacuum environment that meets the preset conditions; the external water cooling source is connected to the water cooling block 24 through the water inlet and outlet holes 4 of the vacuum box 1, and the water cooling block 24 is used to provide a stable cold end temperature to the thermoelectric device 7; the vacuum box 1 is connected to the measuring cable through the cable aviation plug 5 to lead the measurement signal out of the vacuum box.

[0043] The stage 2 can prevent the telescopic rod 9 of the servo electric cylinder 8 from driving the pressure sensor 10 to directly act on the vacuum box 1 body and cause damage to the vacuum box, and can also reduce the action range of the exciter 16 to prevent the vibration from being transmitted to the entire device.

[0044] like Figure 4 As shown, the heating device includes a DC power supply 36, a temperature controller 28, and a ceramic heating plate 22; the DC power supply 36 is connected to the ceramic heating plate 22 through a cable aviation plug 5 for heating, and the ceramic heating plate 22 transfers heat to the thermoelectric device 7 through the heat-conducting copper block 23.

[0045] like Figure 5As shown, the cooling device includes a water chiller 29, a flow meter 30, and a water cooling block 24; the water cooling block 24 is connected to the water chiller 29 through a hose via the water inlet and outlet holes 4, and the water cooling block 24 is used to establish a stable cold end temperature for the thermoelectric device 7. A flow meter 30 is provided on the pipeline between the water cooling block 24 and the water chiller 29 for measuring the flow of cold water; a first platinum resistor 31 is provided at the water inlet of the water cooling block 24 for measuring the temperature of the water inlet of the water cooling block; a second platinum resistor 32 is provided at the water outlet of the water cooling block for measuring the temperature of the water outlet of the water cooling block.

[0046] like Figure 6 As shown, the measurement and control device includes a controller 34 , an industrial computer 35 , and a programmable electronic load 33 .

[0047] The controller 34 is also connected to instruments such as a temperature sensor, a pressure sensor, and a flow meter 30 to measure parameters such as temperature, pressure, and flow. The temperature sensor may be, for example, a thermocouple or a platinum resistor.

[0048] The controller 34 is connected to the DC power supply 36 and the temperature controller 28 for communication. The controller 34 can read the output voltage and output current of the DC power supply 36 and set the heating target temperature of the temperature controller 28. The temperature controller 28 detects the temperature of the heat-conducting copper block 23 through a temperature sensor and controls the DC power supply 36 according to the detected temperature so that the ceramic heating plate 22 reaches the temperature required for the test and maintains the test temperature stable.

[0049] A temperature measuring hole is provided in the middle of the heat-conducting copper block 23; temperature measuring holes are provided at the top, middle and bottom of the heat-conducting block 25, respectively, with a hole spacing of no more than 40 mm, and a temperature sensor is provided in each temperature measuring hole.

[0050] The controller 34 is connected to the cooling device to control the start and stop of the chiller and set the cooling target temperature.

[0051] The controller 34 is respectively connected to the electric cylinder 8 and the pressure sensor 10 of the pressurizing device, and accurately adjusts the pressure applied by the electric cylinder 8 according to the pressure data collected by the pressure sensor 10 .

[0052] The controller 34 is respectively connected to the vacuum measuring instrument and the vacuum pump in the vacuum box 1 , and controls the vacuum pump to establish a vacuum environment meeting preset conditions in the vacuum box 1 according to the vacuum degree parameters collected by the vacuum measuring instrument.

[0053] The controller 34 is connected to the programmable electronic load 33 for communication, and is used to set the resistance of the programmable electronic load 33 and read the voltage and current collected by the programmable electronic load 33. The programmable electronic load 33 is connected to the thermoelectric device 7 through the cable aviation plug 5 to measure the output voltage and output current of the thermoelectric device 7.

[0054] The industrial computer 35 is in communication connection with the controller 34 , and various control parameters of the controller 34 can be set and read on the control interface of the industrial computer 35 .

[0055] The industrial computer 35 is connected to the controller of the vibration device and is used to set the parameters of the vibration device, including vibration frequency, amplitude, waveform, acceleration and the like.

[0056] When the temperature of the hot end of the thermoelectric device reaches the test required temperature, and the temperatures of the hot end and the cold end are constant, the resistance of the programmable electronic load 33 is changed by the controller 34, and the voltage and current of the programmable electronic load 33 are read and recorded. The conversion efficiency of the thermoelectric device is calculated based on the recorded voltage, current, temperature, flow and other parameter values.

[0057] The integrated thermoelectric device test device disclosed in the present invention can provide an inert gas and vacuum oxygen-free test environment, and meet the test requirements of thermoelectric devices with a size of 100mm*100mm or less. The servo electric cylinder applies pressure to the thermoelectric device, which can maintain the stability of the internal resistance and thermal resistance of the thermoelectric device being tested, and at the same time test the ultimate tolerance pressure of the thermoelectric device; the exciter can simulate the on-site vibration environment of multiple frequencies, and has a wide range of application prospects.

[0058] The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terms used herein are selected to best explain the principles of the embodiments, practical applications, or improvements to the technology in the marketplace, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An integrated thermoelectric conversion device testing device, characterized in that: The device comprises: a thermoelectric device to be tested, a heating device, a cooling device, an excitation device, an electric pressurizing device, a vacuum device and a measurement and control device; The vacuum device includes a vacuum box and a stage; the frame is placed on the upper surface of the table, and the vacuum box is placed inside the frame; the air inlet device is connected to the vacuum box through the air inlet hole, and is used to inject inert gas into the vacuum box; the vacuum pump is connected to the vacuum box through the air extraction hole, and is used to establish a vacuum environment that meets preset conditions in the vacuum box; the stage is arranged at the bottom of the vacuum box, and a water cooling block, a heat conducting block, a thermoelectric device, a heat conducting copper block, and a ceramic heating plate are placed on the upper surface of the stage from bottom to top in sequence; The electric pressurizing device includes a servo electric cylinder and a pressure sensor; the servo electric cylinder is arranged on the top of the frame, the bottom end of the telescopic rod of the servo electric cylinder passes through the frame and the vacuum box, the bottom end of the telescopic rod is connected to the pressure sensor, and the servo electric cylinder can drive the telescopic rod to drive the pressure sensor to apply pressure to the thermoelectric device; The excitation device includes an exciter, a push rod, and a mounting bracket. The exciter is fixed to the lower surface of the table through the mounting bracket. The push rod is led out from the exciter, passes through the lower platform and contacts the stage, so as to transmit the vibration of the exciter to the thermoelectric device. The heating device includes a DC power supply, a temperature controller, and a ceramic heating plate; the DC power supply is connected to the ceramic heating plate through a cable aviation plug, so as to make the ceramic heating plate generate heat, and transfer the heat to the thermoelectric device through the heat-conducting copper block; The cooling device includes a water chiller, a flow meter, a temperature sensor and a water cooling block; the water cooling block is connected to the water chiller through a hose via a water inlet and outlet hole, and the water cooling block is used to establish a stable cold end temperature for the thermoelectric device; the flow meter is used to monitor the flow of the water chiller, and the temperature sensor is used to detect the temperature of the water inlet and outlet of the water cooling block; The measurement and control device is used to control the operation of the heating device, cooling device, vibration device, electric pressurizing device and vacuum device.

2. The device according to claim 1, characterized in that The gap between the telescopic rod and the vacuum box is sealed by a stuffing box dynamic sealing assembly to ensure the sealing effect; the stuffing box dynamic sealing assembly includes a stuffing box, a gland and connecting bolts. The stuffing box is filled in the position between the top opening and the telescopic rod, and the gland is pressed by bolts to tighten the stuffing box.

3. The device according to claim 1, characterized in that A through hole is provided at the bottom of the vacuum box body for placing a stage; the stage and the through hole are matched with each other in clearance, and an O-ring is used between the stage and the through hole to form a static sealing connection.

4. The device according to claim 1, characterized in that The measurement and control device includes a controller, an industrial computer, and a programmable electronic load; The controller is connected to the DC power supply and the temperature controller for communication. The controller can read the output voltage and output current of the DC power supply and set the heating target temperature of the temperature controller. The temperature controller detects the temperature of the heat-conducting copper block through a thermocouple and controls the DC power supply according to the detected temperature to reach the temperature required for the test and maintain the test temperature stable. The controller controls the start and stop of the chiller and the water delivery rate according to the temperature detected by the temperature sensor and the flow detected by the flow meter, so that the water cooling block reaches and maintains the target cooling temperature; The controller is connected to the electric cylinder and the pressure sensor of the pressurizing device respectively, and applies a preset pressure to the electric cylinder according to the pressure data collected by the pressure sensor; The controller is connected to the vacuum measuring instrument and the vacuum pump in the vacuum box respectively, and controls the vacuum pump to establish a vacuum environment that meets the preset conditions in the vacuum box according to the vacuum degree parameters collected by the vacuum measuring instrument; The controller is connected to the programmable electronic load for communication, and is used to set the resistance value of the programmable electronic load and read the voltage and current collected by the programmable electronic load; the programmable electronic load is connected to the thermoelectric device through the cable aviation plug to measure the output voltage and output current of the thermoelectric device; The industrial computer is connected to the controller of the vibration device to set the parameters of the vibration device; The industrial computer is connected to the controller for communication, and various control parameters of the controller can be set and read on the control interface of the industrial computer.

5. The device according to claim 1, characterized in that A temperature measuring hole is set in the middle of the heat-conducting copper block; temperature measuring holes are set in the top, middle and bottom of the heat-conducting block respectively, the hole spacing is not more than 40mm, and a temperature sensor is set in each temperature measuring hole.

6. The device according to claim 1, characterized in that A flow meter is provided on the pipeline between the water-cooling block and the chiller to measure the flow of cold water; a first platinum resistor is provided at the water inlet of the water-cooling block to measure the temperature of the water inlet of the water-cooling block; a second platinum resistor is provided at the water outlet of the water-cooling block to measure the temperature of the water outlet of the water-cooling block.

7. The device according to claim 1, characterized in that A first mica heat insulation board is arranged between the water cooling block and the stage, and a second mica heat insulation board is arranged on the top of the ceramic heating plate.

8. The device according to claim 1, characterized in that When the hot end temperature of the thermoelectric device reaches the test requirement and the hot and cold end temperatures are constant, the resistance of the programmable electronic load is changed through the controller, and the voltage and current of the programmed electronic load and the hot and cold end temperatures of the thermoelectric device are read and recorded to determine the electrical performance, maximum temperature difference and cooling efficiency of the thermoelectric device.

Images