A radiation cooling film refrigeration performance testing device

Abstract

The present invention relates to the field of radiation refrigeration technology, and in particular to a radiation refrigeration film refrigeration performance test device, comprising a metal tank body, a cover body arranged on one side of the metal tank body, and a temperature measuring device arranged outside the cover body, the cover body is provided with an opening whose diameter matches the diameter of the thermocouple temperature sensing port of the temperature measuring device, a conduit is extended into the metal tank body at the opening, the thermocouple temperature sensing end of the temperature measuring device penetrates from the opening and extends into the metal tank body along the conduit, the top of the metal tank body is polished to form a superior arc surface, and the bottom of the metal tank body is a plane. The present invention has a simple structure, ingenious construction, low manufacturing cost, good sealing, and can quickly evaluate and test the radiation refrigeration performance of the film before coating, thereby reducing the test cost and improving the test accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of radiation refrigeration, and in particular to a radiation refrigeration film refrigeration performance testing device. Background Art

[0002] As global warming becomes more and more serious, people need to invest more energy in the field of refrigeration to achieve the expected cooling effect. On the one hand, this aggravates the energy crisis. On the other hand, due to the large-scale use of refrigeration and air conditioning, more Freon emissions will also lead to further deterioration of people's living environment. In this context, reducing energy consumption or developing new methods and technologies for refrigeration and cooling is an urgent task. At this time, radiant refrigeration, as a zero-energy, safe, efficient and clean refrigeration technology, has shown practical application value.

[0003] Radiative cooling is a passive cooling method in which an object radiates its own heat to the outer space, a huge cold source, through the atmospheric window in the form of infrared emission to achieve self-cooling. For the atmosphere, electromagnetic waves in different bands have different transmittances. The so-called "atmospheric window" is the band with higher transmittance, such as 0.3-2.5μm, 3.2-4.8μm, and 8-13μm. Among the many bands, the 8-13μm band is the most noteworthy band because blackbody radiation at room temperature is mainly concentrated in this band.

[0004] For a long time, experiments on radiation cooling were mainly conducted at night. This is because the radiator absorbs a large amount of solar radiation energy during the day, causing its own temperature to rise continuously, making the effect of radiation cooling impossible to show. Until recently, scientists have developed a variety of materials and devices that can achieve daytime radiation cooling. The common characteristics of these materials and devices are that the material surface has a high reflectivity to solar radiation (wavelength between 0.3-2.5 microns) and a high infrared emissivity to the transparent atmospheric window spectrum (8-13 microns). Among them, it is particularly worth mentioning that a polymer radiation cooling film developed by a scientific research team at the University of Colorado in the United States in 2017 achieved radiation cooling by silver or aluminum plating on the surface of the polymer-refrigeration microsphere composite film. The polymer radiation cooling film is low-cost, simple in process, and meets the technical requirements of industrial production. In addition, it has good flexibility and can adapt to surfaces of different curvatures, and has a wide range of application scenarios. At present, scientists have conducted a series of tests on this type of material devices, but the tests usually require the surface of one side of the polymer composite film to be silver or aluminum plated first, and the cost of the test is high.

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a radiant refrigeration film refrigeration performance testing device, which can quickly evaluate the radiant refrigeration performance of the film before coating, thereby reducing the testing cost. Summary of the invention

[0006] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a radiant refrigeration film refrigeration performance testing device, which can quickly evaluate the radiant refrigeration performance of the film before coating, thereby reducing the testing cost.

[0007] To achieve the above-mentioned purpose, the technical solution of the present invention is: a radiation refrigeration film refrigeration performance test device, comprising a metal tank body, a cover body arranged on one side of the metal tank body, and a temperature measuring device arranged outside the cover body, the cover body is provided with an opening whose diameter matches the diameter of the thermocouple temperature sensing port of the temperature measuring device, and a conduit is extended from the opening into the metal tank body, and the thermocouple temperature sensing end of the temperature measuring device penetrates from the opening and extends into the metal tank body along the conduit, ensuring that the position of the thermocouple temperature sensing end of the temperature measuring device in the metal tank body is fixed, thereby ensuring the comparability of each test, and an intermediate layer and a refrigeration film are attached to the outside of the metal tank body in sequence, the intermediate layer is a silver film or an aluminum foil, and the top of the metal tank body is polished to form a superior arc surface, which increases the arc surface tension of the metal tank body, so that the refrigeration film and the intermediate layer can be more closely attached to the metal tank body, thereby making the heat conduction smoother and improving the accuracy of the test results, and the bottom of the metal tank body is a plane, which ensures the stability during the test and prevents the metal tank body from shaking and rolling.

[0008] Preferably, the cover body comprises a cover surface and an extension portion fixedly connected to the cover surface, the extension portion is provided with an annular groove, and a sealing ring is provided in the annular groove to seal and fix the cover body.

[0009] Preferably, the conduit is integrally connected to the cover body.

[0010] Preferably, the metal tank body, cover body and conduit are all made of steel alloy.

[0011] Preferably, a handle is provided on the cover body to facilitate opening and closing the cover body.

[0012] Preferably, the thickness of the metal can body is 0.1-0.4 mm, which allows for rapid heat transfer.

[0013] Preferably, the bottom of the metal can body is provided with a first groove, a second groove, a third groove, and a fourth groove in sequence from front to back, the width of the first groove, the second groove, the third groove, and the fourth groove is 4 to 6 mm, and the depth is 0.1 to 0.3 mm. The first groove and the fourth groove are used to fix the head and tail of the middle layer, and the second groove and the third groove are used to fix the head and tail of the refrigeration film.

[0014] Preferably, the cover has a thickness of 0.1 to 0.5 mm, which allows for rapid heat transfer.

[0015] Preferably, the side surfaces of the metal can body and the outer surface of the cover are both affixed with a silver film.

[0016] Preferably, the opening is located between the middle and the top of the cover body.

[0017] The testing method of the present invention comprises the following steps: sticking double-sided tape on the first groove, the second groove, the third groove and the fourth groove at the bottom of the metal can body, and sequentially sticking an intermediate layer and a refrigeration film on the outside of the metal can body, so that the head and tail of the intermediate layer are respectively stuck on the double-sided tape of the first groove and the fourth groove, and the head and tail of the refrigeration film are respectively stuck on the double-sided tape of the second groove and the third groove, so that the intermediate layer and the refrigeration film are in a tensioned and attached state on the top of the metal can body, and then the thermocouple temperature sensing end of the temperature measuring device is passed through the opening on the cover body along the guide tube into the metal can body, the cover body is covered, and finally the device is placed stably in an open-air direct sunlight environment for testing.

[0018] By adopting the above technical scheme, the beneficial effects of the present invention are as follows: the present invention is provided with a metal can body with an openable and closable cover body, and an opening and a conduit are provided on the cover body, so that the thermocouple temperature sensing end of the temperature measuring device can be inserted into the metal can body, and the position of the thermocouple temperature sensing end of the temperature measuring device in the metal can body can be fixed, thereby ensuring the comparability of each test. The present invention sets the top of the metal can body into an excellent arc surface, increases the arc surface tension of the metal can body, and enables the refrigeration film and the middle layer to be more closely attached to the metal can body, so that the heat conduction is smoother and the accuracy of the test results is improved; at the same time, the bottom of the metal can body is set into a plane to ensure stability during the test and avoid shaking and rolling of the metal can body. In addition, the present invention also sets a sealing ring in the cover body to seal and fix the cover body. The present invention has a simple structure, ingenious construction, low manufacturing cost, good sealing, and can quickly evaluate and test the radiation refrigeration performance of the film before coating, thereby reducing the test cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the present invention;

[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 is a side view of the present invention;

[0022] Figure 4 This is a test work diagram of the present invention.

[0023] Explanation of main figure markings: (1. metal can body; 11. first groove; 12. second groove; 13. third groove; 14. fourth groove; 2. cover body; 21. opening; 22. conduit; 23. cover surface; 24. extension portion; 25. annular groove; 26. sealing ring; 27. handle; 3. temperature measuring device). DETAILED DESCRIPTION

[0024] The present invention is further described below with reference to specific embodiments.

[0025] like Figure 1-4 As shown, a radiant cooling film refrigeration performance test device comprises a metal tank body 1, a cover body 2 arranged on one side of the metal tank body 1, and a temperature measuring device 3 arranged outside the cover body 2, wherein the cover body 2 is provided with an opening 21 whose diameter matches the diameter of the thermocouple temperature sensing port of the temperature measuring device 3, and a conduit 22 is extended into the metal tank body 1 at the opening 21, and the thermocouple temperature sensing end of the temperature measuring device 3 penetrates from the opening 21 and extends into the metal tank body 1 along the conduit 22, so as to ensure that the thermocouple temperature sensing end of the temperature measuring device 3 is in the metal tank body 1. The position is fixed to ensure the comparability of each test. The metal tank body 1 is attached with an intermediate layer 4 and a refrigeration film 5 in sequence. The intermediate layer 4 is a silver film or an aluminum foil. The top of the metal tank body 1 is polished to present an arc surface, which increases the arc surface tension of the metal tank body 1, so that the refrigeration film 5 and the intermediate layer 4 can be more closely attached to the metal tank body 1, making the heat conduction smoother and improving the accuracy of the test results. The bottom of the metal tank body 1 is a plane to ensure stability during testing and prevent the metal tank body 1 from shaking and rolling.

[0026] The cover body 1 includes a cover surface 23 and an extension portion 24 fixedly connected to the cover surface 23 . The extension portion 24 is provided with an annular groove 25 . A sealing ring 26 is provided in the annular groove 25 to seal and fix the cover surface 23 .

[0027] The conduit 22 is connected to the cover body 2 as a whole.

[0028] The metal tank body 1, the cover body 2 and the conduit 22 are all made of steel alloy.

[0029] The cover body 2 is provided with a handle 27 to facilitate opening and closing the cover body 1 .

[0030] The thickness of the metal can body 1 is 0.1-0.4 mm, which can quickly transfer heat.

[0031] The bottom of the metal can body 1 is provided with a first groove 11, a second groove 12, a third groove 13, and a fourth groove 14 from front to back, wherein the width of the first groove 11, the second groove 12, the third groove 13, and the fourth groove 14 is 4 to 6 mm, and the depth is 0.1 to 0.3 mm. The first groove 11 and the fourth groove 14 are used to fix the head and tail of the middle layer 4, and the second groove 12 and the third groove 13 are used to fix the head and tail of the refrigeration film 5.

[0032] The cover surface 23 has a thickness of 0.1-0.5 mm, which can quickly transfer heat.

[0033] The side surfaces of the metal can body 1 and the outer surface of the cover body 2 are both affixed with silver films.

[0034] The opening 21 is located between the middle and the top of the cover body 2 .

[0035] The testing method of the present invention is as follows: double-sided tape is pasted on the first groove 11, the second groove 12, the third groove 13, and the fourth groove 14 at the bottom of the metal can body 1, and the middle layer 4 and the refrigeration film 5 are sequentially pasted on the outside of the metal can body 1, so that the head and tail of the middle layer 4 are respectively pasted on the double-sided tape of the first groove 11 and the fourth groove 14, and the head and tail of the refrigeration film 5 are respectively pasted on the double-sided tape of the second groove 12 and the third groove 13, so that the middle layer 4 and the refrigeration film 5 are in a tensioned and attached state on the top of the metal can body 1, and then the thermocouple temperature sensing end of the temperature measuring device 3 is passed through the opening 21 on the cover body 2 along the conduit 22 and fixed in position, the cover body 2 is covered, and finally the device is placed stably in an open-air direct sunlight environment for testing.

[0036] Two uncoated polyethylene refrigeration films A0 and B0 were prepared, of which the refrigeration capacity of refrigeration film A0 was better than that of refrigeration film B0; these two films were silver-coated to obtain refrigeration films A1 and B1 respectively. According to the above method, the four films A0, A1, B0, and B1 were tested simultaneously in the same environment (the middle layer was uniformly a silver film), and the maximum temperature difference ΔT with the ambient temperature within 10-30 minutes was measured and listed in the following Table 1 (Note: ΔT = T1-T2, where T1 is the temperature inside the metal tank and T2 is the ambient temperature).

[0037] Table 1 Temperature difference between the metal tank and the environment

[0038] A0 A1 B0 B1 ΔT(℃) -4.9 -5.4 -2.1 -2.5

[0039] It can be seen from Table 1 above that the present invention can be used to quickly evaluate the radiation cooling performance of a thin film before coating, and the test cost is low.

[0040] The above-mentioned are only preferred embodiments of the present invention and cannot limit the scope of implementation of the present invention. All equivalent changes and decorations made according to the scope of the patent application of the present invention should still fall within the scope of the present invention.

Claims

1. A radiation cooling film refrigeration performance test device, characterized in that: It includes a metal tank body, an openable and closable cover body arranged on one side of the metal tank body, and a temperature measuring device arranged outside the cover body, the cover body is provided with an opening whose diameter matches the diameter of the thermocouple temperature sensing port of the temperature measuring device, a conduit is extended from the opening into the metal tank body, the thermocouple temperature sensing end of the temperature measuring device penetrates from the opening and extends into the metal tank body along the conduit, the top of the metal tank body is polished to present a superior arc surface, the bottom of the metal tank body is a plane, and the bottom of the metal tank body is sequentially provided with a first groove, a second groove, a third groove, and a fourth groove from front to back, the side surface of the metal tank body and the outer surface of the cover body are both attached with an intermediate layer and a film to be measured, the head and tail of the intermediate layer are respectively attached to the first groove and the fourth groove, and the head and tail of the film to be measured are respectively attached to the second groove and the third groove.

2. A radiation cooling film refrigeration performance testing device according to claim 1, characterized in that: The cover body comprises a cover surface and an extension portion fixedly connected to the cover surface. An annular groove is arranged on the extension portion, and a sealing ring is arranged in the annular groove.

3. The radiant cooling film refrigeration performance testing device according to claim 1, characterized in that: The conduit is connected with the cover body as a whole.

4. The radiant cooling film refrigeration performance testing device according to claim 1, characterized in that: The metal tank body, cover body and conduit are all made of steel alloy material.

5. The radiant cooling film refrigeration performance testing device according to claim 1, characterized in that: The cover body is provided with a handle.

6. The radiant cooling film refrigeration performance testing device according to claim 1, characterized in that: The thickness of the metal can body is 0.1-0.4 mm.

7. The radiant cooling film refrigeration performance testing device according to claim 1, characterized in that: The thickness of the cover is 0.1-0.5 mm.

8. The radiant cooling film refrigeration performance testing device according to claim 1, characterized in that: The opening is located between the middle and the top of the cover body.

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