Component constant temperature control test box

Abstract

A module constant temperature control test box belongs to the field of solar cell module testing. The device is characterized by comprising a constant-temperature box, a cooling assembly, a battery temperature probe, an area light source and an upper computer, a partition plate is arranged in the constant-temperature box; the separator plate is provided with a gap used for placing a solar cell module to be tested. Air outlets are formed in the top and the bottom of the partition plate; and the cooling assembly, the battery temperature probe and the surface light source are electrically connected with the upper computer. An existing testing device is improved, a partition plate is arranged in a constant-temperature box, air outlets are formed in the top and the bottom of the constant-temperature box respectively, and a cold air circulating system is formed in the working process. Meanwhile, the upper computer analyzes and processes the collected temperature information, the cold air flow and the temperature are controlled by controlling the temperature of a fan and a cooling medium in the cooling assembly, then the temperature in the constant-temperature box is rapidly and evenly controlled, the adjusting efficiency is high, the temperature is constant, the structure is simple, and the constant-temperature box is suitable for application and popularization.

Description

Technical Field

[0001] This utility model belongs to the field of solar cell module testing, and in particular relates to a module constant temperature control test chamber. Background Technology

[0002] With the rapid development of the solar cell industry, the market has placed higher demands on the testing accuracy of solar cell modules (hereinafter referred to as "modules"). This is especially true regarding a crucial factor affecting module testing: testing temperature. Therefore, the need for constant temperature control during module testing has emerged. When a module is continuously exposed to simulated sunlight, its surface temperature rises steadily. Since module performance testing requires a constant temperature, constant temperature control of the module testing environment is essential.

[0003] During constant temperature control, it is necessary to ensure that the temperature values ​​detected by multiple test points on the module surface are within the allowable accuracy range of the preset detection temperature value to guarantee the accuracy of the test data. Currently, there is no control device on the market that can simultaneously maintain a constant and controllable surface temperature of the module under continuous illumination, and also possess uniformity. Some existing steady-state constant temperature control devices use fans to cool the module surface, but they cannot perform temperature control, resulting in poor temperature control performance. Summary of the Invention

[0004] The present invention aims to solve the above problems by providing a constant temperature control test chamber for solar cell modules.

[0005] The component constant temperature control test chamber of this utility model includes a constant temperature chamber, a cooling component, a battery temperature probe, a surface light source, and a host computer.

[0006] A partition is provided inside the constant temperature chamber; the partition has a notch for placing the solar cell module to be tested.

[0007] The cooling assembly includes an air outlet; air outlets are provided at the top and bottom of the aforementioned partition; the air outlets at the top and bottom of the partition have opposite or the same air outlet direction.

[0008] The front wall of the constant temperature chamber is provided with transparent glass; the surface light source is located directly in front of the transparent glass; the light emitted by the surface light source shines continuously and evenly through the transparent glass onto the solar cell module under test placed in the constant temperature chamber, and the test of the solar cell module under test is completed by the testing equipment.

[0009] The battery temperature probe is placed on the surface of the solar cell module under test. The temperature of the solar cell module under test can be measured from different horizontal heights through the battery temperature probe. After being transmitted to the host computer for processing, more accurate temperature parameter information can be obtained. Then, the host computer can control the cooling equipment to achieve constant temperature control.

[0010] The cooling components, battery temperature probe, and surface light source are all electrically connected to the aforementioned host computer.

[0011] During solar cell module testing, the solar cell module under test is installed at the notch in the separator, and the cell temperature probe is placed on the surface of the module. The separator and the module under test divide the front and back of the temperature control chamber into two independent spaces. The host computer controls the cooling components based on the temperature information measured by the cell temperature probe, outputting cool air through the vents. When the airflow directions from the top and bottom vents are different, the cool air circulates within the temperature control chamber, further improving the cooling and temperature control effect.

[0012] Furthermore, in the component constant temperature control test chamber of this utility model, the cooling component further includes a cooling device; the cooling device is connected to a cooling medium input pipe and a cooling medium output pipe;

[0013] The aforementioned air outlet consists of a heat exchanger and a fan; the fan is fixedly installed on one side of the aforementioned heat exchanger; the heat exchanger is connected to the cooling medium input pipe and the cooling medium output pipe respectively via connecting hoses; cooling medium temperature probes are installed on both the cooling medium input pipe and the cooling medium output pipe; a flow regulating valve is installed on the connecting hose connected to the cooling medium input pipe; the cooling equipment, cooling medium temperature probes, flow regulating valves, and fan are all electrically connected to the aforementioned host computer.

[0014] When the cooling system is operating, the cooling medium, cooled by the cooling equipment, enters the heat exchanger through the cooling medium inlet pipe and connecting hose. Driven by a fan located on one side of the heat exchanger, the fan-driven airflow exchanges heat with the cooling medium as it passes through the heat exchanger's outer shell, resulting in cool air being blown out from the side of the heat exchanger without a fan. The cooled medium, after heat exchange, flows back into the cooling equipment through the cooling medium outlet pipe for further cooling and reuse. The cooling medium temperature is controlled by a host computer. Temperature data is measured by a cooling medium temperature probe, and by controlling the cooling medium temperature and fan speed, the outlet air temperature and speed are controlled, thus controlling the rate of cooling and ultimately maintaining a constant temperature within the chamber.

[0015] Furthermore, in the constant temperature control test chamber of this invention, the cooling components include two sets; the air outlets of the two sets of cooling components are respectively located at the top and bottom of the aforementioned partition. By setting two sets of cooling components, and controlling the air outlets at the top and bottom independently through two cooling devices, more precise control of the temperature inside the constant temperature chamber can be achieved.

[0016] Furthermore, in the constant temperature control test chamber for the components described in this utility model, the surface light source provides uniform and continuous illumination; the light intensity of the surface light source is continuously adjustable from 50 to 5000 W / m². Besides influencing the electrical performance of the solar cell module under test, light intensity also represents the heating capacity of the module in terms of temperature control; the greater the light intensity, the greater the heating capacity, and the greater the cooling capacity required to control the temperature.

[0017] Furthermore, in the component constant temperature control test chamber of this utility model, the width of the notch ranges from 100mm to 3000mm; the height of the notch ranges from 100mm to 2000mm. The notch size can be adjusted to accommodate solar cell modules of different sizes for testing.

[0018] Furthermore, in the component constant temperature control test chamber of this utility model, the battery temperature probe is a surface-mount resistance temperature sensor, a thermocouple temperature sensor, an infrared temperature sensor, or a fiber optic temperature sensor. The battery temperature probes can be arranged uniformly at equal intervals or non-uniformly at unequal intervals to obtain the surface temperature of the component. The chamber has a temperature-regulating circulating airflow. The battery temperature probes are used to measure the surface temperature of the component. Due to their small size, the temperature probes have a small surface area exposed to the airflow and are less affected by the circulating airflow.

[0019] Furthermore, in the component constant temperature control test chamber of this utility model, the cooling medium used in the cooling equipment is water, water plus antifreeze, R-744, UOLEN5, R22, R134a, R410A, R32, R717, R290, R600a, R234yf, or R513A. When using water, the temperature control range is continuously adjustable from 5℃ to 100℃; when using water plus antifreeze, the temperature control range is continuously adjustable from -40℃ to 100℃; the temperature control range of R-744 is continuously adjustable from -50℃ to 100℃; and the temperature control range of UOLEN5 (UOLEN5 high and low temperature heat transfer fluid) is continuously adjustable from -70℃ to 250℃. R22 is continuously adjustable from -40℃ to 60℃; R134a is continuously adjustable from -30℃ to 50℃; R410A is continuously adjustable from -50℃ to 50℃; R32 is continuously adjustable from -40℃ to 60℃; R717 is continuously adjustable from -70℃ to 50℃; R290 is continuously adjustable from -40℃ to 60℃; R600a is continuously adjustable from -30℃ to 50℃; R234yf is continuously adjustable from -30℃ to 50℃; R513A is continuously adjustable from -30℃ to 50℃. By selecting different media for heat exchange, different temperature control range requirements can be met.

[0020] Furthermore, in the constant temperature control test chamber of this utility model, the air outlets are arranged uniformly or non-uniformly along the width of the chamber. When the air outlets are evenly arranged along the width of the chamber, the consistency of the air velocity flowing in the same horizontal direction can be ensured. Simultaneously, the flow rate can be adjusted by the flow valve to ensure consistent water flow in the heat exchangers at each air outlet, improving the uniformity of the outlet temperature. This better achieves consistency in air velocity and cold air temperature at the same horizontal height, resulting in a smaller temperature difference at the same horizontal point. Within the temperature difference range, this ensures uniform horizontal temperature and achieves a better constant temperature effect.

[0021] The component constant temperature control test chamber of this utility model improves upon existing testing devices by incorporating partitions within the chamber and installing air outlets at both the top and bottom to create a cold air circulation system during operation. Simultaneously, a host computer analyzes and processes the collected temperature information, controlling the fan and cooling medium temperature within the cooling components to regulate the cold air flow and temperature. This achieves rapid and balanced temperature control within the chamber, resulting in high efficiency, constant temperature, and a simple structure suitable for widespread application. Attached Figure Description

[0022] Figure 1 This is a top view of the component constant temperature control test chamber described in this embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the cooling component structure according to an embodiment of the present utility model;

[0024] Figure 3 This is a side view of the constant temperature chamber described in an embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of the internal partition of the constant temperature chamber described in an embodiment of the present utility model;

[0026] The components are: 1-cooling component, 2-surface light source, 3-temperature chamber, 4-cooling equipment, 5-cooling medium input pipe, 6-cooling medium output pipe, 7-cooling medium temperature probe, 8-flow regulating valve, 9-connecting hose, 10-heat exchanger, 11-fan, 12-glass, 13-solar cell module under test, 14-separator, and 15-cell temperature probe. Detailed Implementation

[0027] The constant temperature control test chamber of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0028] This embodiment discloses a component constant temperature control test chamber, such as... Figure 1As shown, the system includes a constant temperature chamber 3, a cooling assembly 1, a battery temperature probe 15, a surface light source 2, and a host computer. A partition 14 is installed inside the constant temperature chamber 3. A notch is provided on the partition 14. The solar cell assembly to be tested 13 is fixedly installed at the notch. By installing the solar cell assembly to be tested 13 at the notch of the partition 14, the front and rear of the constant temperature chamber 3 are divided into two independent spaces. A translucent glass 12 is provided on the front wall of the constant temperature chamber 3. The surface light source 2 is located directly in front of the translucent glass 12 on the front wall of the constant temperature chamber 3.

[0029] In the embodiments disclosed herein, such as Figure 2 As shown, the cooling assembly 1 includes a cooling device 4 and an air outlet; in this embodiment, the cooling medium is water; the air outlet consists of a heat exchanger 10 and a fan 11; the fan 11 is fixedly installed on one side of the aforementioned heat exchanger 10; the cooling device 4 is connected to a cooling medium input pipe and a cooling medium output pipe; the heat exchanger 10 is connected to the cooling medium input pipe and the cooling medium output pipe respectively via a connecting hose 9; both the cooling medium input pipe and the cooling medium output pipe are equipped with cooling medium temperature probes 7 to detect the supply and return water temperatures; a flow regulating valve 8 is installed on the connecting hose 9 connected to the cooling medium input pipe; the cooling device 4, the cooling medium temperature probe 7, the flow regulating valve 8, and the fan 11 are all electrically connected to the aforementioned host computer. During the cooling process, the water flows through the cooling medium input pipe 5, through the flow regulating valve 8, the connecting hose 9, the heat exchanger 10, the connecting hose 9, and the cooling medium output pipe 6, and then returns to the cooling device 4, completing the cooling water circulation. The circulating water is cooled by the cooling device 4, and the heat exchanger 10 is blew by the fan 11. The air from the fan 11 is cooled after passing through the heat exchanger 10.

[0030] In this embodiment of the disclosure, the cooling assembly includes two sets; such as Figure 3 As shown, air outlets are provided at the top and bottom of the aforementioned partition 14, located at the top and bottom of the aforementioned constant temperature chamber 3, respectively. One air outlet faces the front wall of the constant temperature chamber 3, and the other air outlet faces the rear wall of the constant temperature chamber 3. The air outlets are evenly distributed along the width of the constant temperature chamber 3. The cooling component 1 and the battery temperature probe 15 are both electrically connected to the aforementioned host computer. Figure 4 As shown, in this embodiment of the present disclosure, 12 battery temperature probes 15 are evenly and uniformly arranged at equal intervals on the surface of the solar cell module 13 to be tested.

[0031] Before testing, the solar cell module 13 to be tested is placed in the constant temperature chamber 3, fixed and connected, including mechanical fixation and electrical testing connections. During testing, the surface light source 2 emits uniform and continuous light, which passes through the glass 12 and evenly illuminates the front side of the solar cell module 13 to be tested. Because the surface light source 2 emits light that evenly illuminates the module, heat is generated relatively evenly distributed on the module, resulting in a uniform temperature rise on the module surface.

[0032] The temperature of the cooling water prepared by the cooling device 4 is preset by the host computer. The cooling water is supplied to the heat exchanger 10 for water circulation through pipelines. The air generated by the fan 11 is cooled by the heat exchanger 10 and enters the constant temperature chamber 3 to cool the surface of the solar cell module 13 under test.

[0033] In this embodiment, the air circulation sequence is as follows: Air from the upper fan 11 blows air through the heat exchanger 10, enters the cavity on the front of the component, flows across the front of the component, exchanges heat with the front of the component, and then continues to blow downwards. After reaching the lower fan 11, the air is drawn in by the lower fan 11 and then blown out through the lower heat exchanger 10, completing the hot air cooling process. Cold air enters the cavity on the back of the component, flows across the back of the component, exchanges heat with the back of the component, and then continues to blow upwards, entering the suction area of ​​the upper fan 11, completing one cycle. The airflow direction is as follows: Figure 3 As indicated by the arrows, air circulates through the front and rear chambers of the constant temperature chamber 3, the heat exchanger 10, and the front and back of the components, completing heat exchange and cooling the components.

[0034] When performing constant temperature control, depending on the specific usage, for example, with a fixed fan 11 airflow, the surface temperature of the module can be controlled by setting the cooling water temperature, thereby changing the temperature difference between the cooling water and the module, and thus altering the heat exchange efficiency to control the temperature rise or fall. Alternatively, with a constant cooling water setpoint, controlling the fan 11 airflow can similarly change the heat exchange efficiency, thereby controlling the temperature rise or fall. Furthermore, a combined control method, simultaneously controlling both the cooling water temperature and the fan 11 airflow, can be used to change the heat exchange efficiency and control the temperature rise or fall.

[0035] In this embodiment, multiple battery temperature probes 15 are located on the back of the solar cell module 13 under test. Fans 11 are evenly distributed across the width of the housing to ensure consistent airflow speed in the same horizontal direction. Multiple heat exchangers 10 are arranged along the width of the housing, and each heat exchanger 10 has a flow control valve at its inlet. By controlling the consistency of water flow, the water temperature in the heat exchangers 10 is ensured to be uniform, thus ensuring consistent cold air temperature at the same horizontal point. This guarantees consistent airflow speed and cold air temperature at the same horizontal height. Consequently, the battery temperature probes 15 at the same horizontal point have minimal temperature detection error, and within a certain temperature range, the horizontal temperature remains uniform.

[0036] Similarly, after the upper fan 11 blows air through the heat exchanger 10, it cools the front of the module. As the air flows across the front of the module, the heat generated by the light source heats the air, creating a temperature difference at different heights within the same row. This results in a temperature gradient on the front of the module, with the temperature gradually increasing from the top to the bottom. Similarly, after the lower fan 11 blows air through the heat exchanger 10, it cools the back of the module. As the air flows across the back of the module, the heat generated by the light source is transferred from the front to the back. Due to the temperature gradient on the front, the heat transfer efficiency varies at different heights, and this efficiency is positively correlated with the front temperature. This manifests as a rapid temperature rise at the bottom and a slower rise at the top of the back of the module, forming a temperature gradient. However, the airflow on the back of the module blows upwards, creating a similar temperature gradient, with the lower cool air gradually increasing in temperature towards the top. In other words, the temperature gradient of the cooling air on the back is exactly opposite to the temperature rise gradient on the back, which can offset part of the temperature difference on the back. The main reason is that the temperature rise gradient and the temperature gradient of the cooling air are not equal, so they cannot completely offset the temperature difference at the detection points on the back of the module. However, when the air velocity is high enough, the heat exchange rate increases, which can reduce the temperature difference at different heights, thereby meeting the temperature uniformity requirements at different heights within a certain temperature difference range.

[0037] It should be noted that, as disclosed in this embodiment, in specific applications, the inventors can also combine the upper and lower inlet and outlet cooling medium pipelines, and adjust and distribute the water flow of the upper and lower pipelines through flow valves, using one cooling device 4 to achieve the same water supply purpose as two cooling devices 4 of the same model. Alternatively, the refrigerant can be replaced with other media depending on the specific application scenario.

Claims

1. A component constant temperature control test chamber, characterized in that: Includes a constant temperature chamber, cooling components, battery temperature probe, surface light source, and host computer; A partition is installed inside the constant temperature chamber; The partition plate is provided with a notch for placing the solar cell module to be tested; The cooling assembly includes an air outlet; The aforementioned partition is provided with air outlets at both the top and bottom; the air outlets at the top and bottom of the partition are either opposite or in the same direction. The front wall of the constant temperature chamber is provided with transparent glass; The surface light source is positioned directly in front of the aforementioned light-transmitting glass; The light emitted by the surface light source shines through the transparent glass onto the front of the solar cell module under test. The battery temperature probe is placed on the surface of the solar cell module under test; The cooling components, battery temperature probe, and surface light source are all electrically connected to the aforementioned host computer.

2. The component constant temperature control test chamber according to claim 1, characterized in that: The cooling assembly also includes a cooling device; the cooling device is connected to a cooling medium inlet pipe and a cooling medium outlet pipe. The aforementioned air outlet consists of a heat exchanger and a fan; the fan is fixedly mounted on one side of the aforementioned heat exchanger. The heat exchanger is connected to the cooling medium inlet pipe and the cooling medium outlet pipe respectively via connecting hoses; Cooling medium temperature probes are installed on both the cooling medium inlet pipe and the cooling medium outlet pipe. A flow regulating valve is installed on the connecting hose that is connected to the cooling medium inlet pipe; The cooling equipment, cooling medium temperature probe, flow regulating valve, and fan are all electrically connected to the aforementioned host computer.

3. The component constant temperature control test chamber according to claim 2, characterized in that: The cooling assembly includes two sets; the air outlets of the two sets of cooling assemblies are respectively located at the top and bottom of the aforementioned partition.

4. The component constant temperature control test chamber according to claim 1 or 3, characterized in that: The surface light source provides uniform and continuous illumination; the light intensity of the surface light source is continuously adjustable from 50 to 5000 W / m².

5. The component constant temperature control test chamber according to claim 1 or 3, characterized in that: The width of the notch ranges from 100mm to 3000mm; the height of the notch ranges from 100mm to 2000mm.

6. The component constant temperature control test chamber according to claim 1 or 3, characterized in that: The battery temperature probe is a patch-type resistance temperature sensor, a thermocouple temperature sensor, an infrared temperature sensor, or a fiber optic temperature sensor.

7. The component constant temperature control test chamber according to claim 2, characterized in that: The cooling medium used in the cooling equipment is water, water plus antifreeze, or R-744, UOLEN5, R22, R134a, R410A, R32, R717, R290, R600a, R234yf, or R513A.

8. The component constant temperature control test chamber according to claim 1 or 3, characterized in that: The air outlets are arranged uniformly or unevenly along the width of the constant temperature chamber.

Images