A photothermal conversion device for phase change materials

Abstract

This utility model discloses a photothermal conversion device for phase change materials, relating to the field of photothermal conversion technology. It includes a focusing box with a light source hole at the top and a xenon lamp assembly at the top of the light source hole. A drawer-type sample chamber is located inside the drawer-type sample chamber, with a petri dish containing a sample placed in its inner bottom. A temperature measuring unit is located on the outer bottom of the petri dish. This utility model utilizes the aforementioned photothermal conversion device for phase change materials, avoiding the influence of external factors on testing, facilitating efficient infrared thermal imaging of samples, and obtaining reliable efficiency calculation results.

Description

Technical Field

[0001] This utility model relates to the field of photothermal conversion technology, and in particular to a photothermal conversion device for phase change materials. Background Technology

[0002] Photothermal conversion efficiency refers to the ratio of light energy to heat energy, usually expressed as a percentage. Highly efficient photothermal conversion is crucial for improving solar energy utilization and reducing energy consumption. Traditional open testing methods are conducted under natural environmental conditions, calculating efficiency by measuring input light energy and output heat energy. While simple and easy to implement, this method's accuracy can be significantly affected by environmental factors. Furthermore, photothermal conversion efficiency testing requires frequent infrared thermal imaging of the sample. Existing imaging methods are time-consuming, and the short imaging intervals make frequent operations highly susceptible to inaccurate data collection. Utility Model Content

[0003] The purpose of this invention is to provide a photothermal conversion device for phase change materials, which avoids the test being easily affected by external factors, facilitates efficient collection of infrared thermal imaging of samples, and obtains reliable efficiency calculation results.

[0004] To achieve the above objectives, this utility model provides a photothermal conversion device for phase change materials, including a focusing box. The top of the focusing box is provided with a light source hole, and a xenon lamp assembly is provided on top of the light source hole. The bottom of the focusing box is provided with a drawer placement slot, and a drawer-type sample chamber is provided in the drawer placement slot. A culture dish is placed in the inner bottom of the drawer-type sample chamber, and a sample is placed in the culture dish. A temperature measuring unit is provided on the outer bottom of the culture dish.

[0005] Preferably, the xenon lamp assembly includes a light outlet, with the light source hole corresponding to the lower part of the light outlet, a plane mirror disposed above the light outlet, one end of the plane mirror connected to a lens tube, the other end of the lens tube connected to a lamp box, a display screen and an adjustment knob disposed on the side of the lamp box on which the lens tube is mounted, a base disposed below the lamp box, and a heat dissipation vent disposed on the side of the lamp box.

[0006] Preferably, the temperature measuring unit includes a K-type adhesive thermocouple, which is disposed at the bottom of the culture dish and connected to a thermometer via wires.

[0007] Preferably, the drawer-type sample compartment has a positioning groove where the culture dish is placed.

[0008] Preferably, a wire hole is provided on one side of the drawer-type sample compartment.

[0009] Preferably, the material of the focusing box and the drawer-type sample compartment is polystyrene foam.

[0010] Therefore, the photothermal conversion device for phase change materials of this invention, which adopts the above-described structure, has the following advantages compared with the prior art: 1. This utility model adopts a drawer-type sample chamber design, which allows the sample to be placed in and taken out easily in the petri dish, avoiding the need to frequently open the entire device, and enabling infrared thermal imaging acquisition of the sample at more accurate time intervals. 2. This invention places a K-type adhesive thermocouple directly at the bottom of the petri dish, which can monitor temperature changes in real time very close to the sample. This is crucial for studying the temperature response during phase transition processes, and the data acquisition is direct and accurate. 3. This utility model selects polystyrene foam plastic as the main material for the focusing box and drawer-type sample chamber. This material has low cost and good thermal insulation performance, which helps to reduce the influence of external ambient temperature on the sample heating process and maintain the relative stability of the sample's surrounding environment.

[0011] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0012] Figure 1 This is a front view of an embodiment of a phase change material photothermal conversion device according to the present invention; Figure 2 This is a structural diagram of the temperature measuring unit of an embodiment of a phase change material photothermal conversion device according to this utility model; Figure Labels 1. Concentrator box; 2. Light source hole; 3. Xenon lamp assembly; 4. Drawer placement slot; 5. Drawer-type sample chamber; 6. Petri dish; 7. Sample; 8. Temperature measuring unit; 81. K-type adhesive thermocouple; 82. Wire; 83. Thermometer; 9. Positioning slot; 10. Wire hole; 31. Light outlet; 32. Plane mirror; 33. Lens tube; 34. Lamp box; 35. Display screen; 36. Adjustment knob; 37. Base; 38. Heat dissipation vent. Detailed Implementation

[0013] Example In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0014] like Figures 1-2As shown, the present invention discloses a photothermal conversion device for phase change materials, comprising a focusing box 1, a light source hole 2 at the top of the focusing box 1, a xenon lamp assembly 3 at the top of the light source hole 2, a drawer placement slot 4 at the bottom of the focusing box 1, a drawer-type sample chamber 5 inside the drawer placement slot 4, a petri dish 6 placed inside the inner bottom of the drawer-type sample chamber 5, a sample 7 placed inside the petri dish 6, and a temperature measuring unit 8 at the outer bottom of the petri dish 6. The drawer-type sample chamber 5 design allows the sample 7 to be easily placed in and removed from the petri dish 6, avoiding frequent opening of the entire device, and enabling infrared thermal imaging acquisition of the sample 7 at more accurate time intervals.

[0015] The xenon lamp assembly 3 includes a light outlet 31, with a light source hole 2 below the light outlet 31. A plane mirror 32 is positioned above the light outlet 31, and one end of a lens tube 33 is connected to the plane mirror 32. The other end of the lens tube 33 is connected to a lamp housing 34. A display screen 35 and an adjustment knob 36 are also provided on the side of the lamp housing 34 where the lens tube 33 is mounted. A base 37 is positioned below the lamp housing 34, and a heat dissipation vent 38 is provided on the side of the lamp housing 34. This helps to dissipate the large amount of heat generated when the xenon lamp is working, protecting the lamp itself, and may also play a role in maintaining a relatively stable internal temperature of the focusing box 1 (although the foam plastic itself is heat-insulating, the heat dissipation of the lamp still needs to be considered). The display screen 35 and adjustment knob 36 on the lamp housing 34 indicate that the power of the light source or other parameters can be adjusted, which helps to simulate different lighting conditions or optimize experimental parameters, improving the flexibility and controllability of the experiment.

[0016] The temperature measuring unit 8 includes a K-type adhesive thermocouple 81, which is placed at the bottom of the culture dish 6 and connected to a thermometer 83 via a wire 82. By placing the K-type adhesive thermocouple 81 directly at the bottom of the culture dish 6, the temperature change can be monitored in real time very close to the sample 7. This is crucial for studying the temperature response during the phase transition process, and the data acquisition is direct and accurate.

[0017] The drawer-type sample chamber 5 has a positioning groove 9 at the place where the petri dish 6 is placed. The positioning groove 9 at the bottom of the drawer-type sample chamber 5 ensures the stability and consistency of the placement of the petri dish 6, which is beneficial to the repeatability of the experiment.

[0018] A wire threading hole 10 is provided on one side of the drawer-type sample compartment 5.

[0019] The material of the focusing box 1 and the drawer-type sample chamber 5 is polystyrene foam. Polystyrene foam is chosen as the main material for the focusing box 1 and the drawer-type sample chamber 5. This material has low cost and good heat insulation performance, which helps to reduce the influence of the external ambient temperature on the heating process of sample 7, maintain the relative stability of the environment around sample 7, reduce heat loss, and thus may improve the measured photothermal conversion efficiency value.

[0020] The specific implementation process is as follows: 1. System initialization: Turn on the xenon lamp power source and preheat for 10-15 minutes to stabilize the light intensity. Connect the thermometer to the K-type adhesive thermocouple, zero it, and then set it to real-time monitoring mode.

[0021] 2. Sample loading: Remove the drawer-type sample compartment from the side wall of the condenser box, place the photothermal material to be tested in the culture dish, and place it flat in the positioning slot in the center of the drawer-type sample compartment. Ensure that the temperature measuring end of the K-type adhesive thermocouple is tightly attached to the outer bottom surface of the culture dish, and push the drawer-type sample compartment into the condenser box at a uniform speed.

[0022] 3. Photothermal conversion experiment: Adjust the preset power of the xenon lamp to 500W / m², start irradiation after starting, continuously record the temperature change curve of the material through a thermometer, and at the same time observe whether the internal temperature of the heat preservation box is stable within ±2℃.

[0023] 4. Dynamic sampling and monitoring: Keep the xenon lamp light source working continuously, insert an infrared transmission-visible light cutoff filter into the xenon lamp path, pull out the drawer-type sample chamber, complete the infrared thermal imaging within 3 seconds, remove the filter after the imaging is completed, and push the drawer-type sample chamber back in.

[0024] 5. Experiment termination: Turn off the xenon lamp light source, and after the temperature reading on the thermometer has dropped to room temperature, remove the sample, clean the contact surface of the culture dish, and retrieve the K-type adhesive thermocouple.

[0025] Therefore, this utility model adopts a phase change material photothermal conversion device with the above structure, which avoids the test being easily affected by external factors, facilitates efficient collection of infrared thermal imaging of samples, and obtains reliable efficiency calculation results.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A photothermal conversion device of phase change material, characterized in that: The device includes a focusing box, a light source hole on the top of the focusing box, a xenon lamp assembly on the top of the light source hole, a drawer placement slot at the bottom of the focusing box, a drawer-type sample compartment inside the drawer placement slot, a petri dish inside the inner bottom of the drawer-type sample compartment, a sample inside the petri dish, and a temperature measuring unit on the outer bottom of the petri dish.

2. The photothermal conversion device of claim 1, wherein: The xenon lamp assembly includes a light outlet, with the light source hole corresponding to the lower part of the light outlet. A plane mirror is disposed above the light outlet, and one end of a lens tube is connected to the plane mirror. The other end of the lens tube is connected to a lamp box. A display screen and an adjustment knob are also disposed on the side of the lamp box on which the lens tube is mounted. A base is disposed under the lamp box, and a heat dissipation vent is disposed on the side of the lamp box.

3. The device of claim 2, wherein: The temperature measuring unit includes a K-type adhesive thermocouple, which is placed at the bottom of the culture dish and connected to a thermometer via wires.

4. The device of claim 3, wherein: The drawer-type sample compartment has a positioning groove for placing the culture dish.

5. The device of claim 2, wherein: A wire threading hole is provided on one side of the drawer-type sample compartment.

6. The device of claim 5, wherein: The focusing box and the drawer-type sample compartment are made of polystyrene foam.

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