A cold table temperature range indicator that changes color with temperature.

Abstract

This invention discloses a temperature range indicator for a cold table that changes color with temperature, comprising: a thick aluminum plate, a cold head mounted at the top center of the aluminum plate, a water-cooled hose connected to the cold head, a cup cover mounted at the bottom center of the aluminum plate, and supports at the four corners. It is placed above the center of a hot table. This temperature range indicator uses polycaprolactone, which is compatible with various solvents at room temperature and has good plasticity and processability, as a template for a gel system. While achieving temperature-indicating color development, it also increases the processability and practicality of the gel. This temperature range indicator employs the principle of temperature-dependent physical color change, indicating temperature distribution changes over a large area, allowing operators to easily determine the temperature range of the cold table surface by simply observing the color change of the scattered light transmitted through the temperature-indicating material.

Description

Technical Field

[0001] This invention relates to the technical field of cold table temperature range indicator devices, specifically a cold table temperature range indicator device that can change color with temperature changes. Background Technology

[0002] In odor transfer production using a dual-temperature method, the cold stage needs continuous cooling to maintain the production area near room temperature. Due to the specific nature of odor transfer production, it's undesirable to introduce excessive foreign substances that could create odor contaminants, while simultaneously requiring temperature monitoring over as much of the cold stage as possible. This limits the viability of installing numerous conventional resistance temperature sensors. Using traditional thermometers also presents many difficulties in installation and observation. Therefore, colorimetric temperature-indicating materials are a feasible solution.

[0003] Temperature-based color development generally employs two methods: chemical and physical. Since this cooling stage is designed for the production of scent sources for police dogs, physical color development is less prone to introducing external contamination and is convenient to use. Currently, the synthesis of physically color-developed gel structures through gelation processes is a hot research topic. A common approach is the bicontinuous structural system, namely a closely packed bicontinuous emulsion gel. This system can force colloidal particles to wet and adsorb at the interface of two immiscible liquids by controlling the spinolysis of the solution, forming a porous structure with bends. However, its reproducibility, stability, and mass production are relatively difficult. This invention aims to improve the reproducibility and stability of color-developing gel preparation and also attempts to control the gelation temperature and optical properties of the gel by adjusting the type and size of nanoparticles. Summary of the Invention

[0004] The purpose of this invention is to provide a cold table temperature range indicator that changes color with temperature, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a cold table temperature range indicator device that can change color with temperature, comprising: a thick aluminum plate, brackets provided at the four corners of the bottom of the thick aluminum plate, a cold head installed in the center of the thick aluminum plate, a water-cooling hose connected to the cold head, and the other end of the water-cooling hose connected to a radiator.

[0006] Preferably, the thick aluminum plate further includes: mounting grooves, filling gel, optical glass, mirror and light source, and two sets of mounting grooves are formed on the upper surface of the thick aluminum plate.

[0007] Preferably, the mounting groove is filled with a filling gel, the filling gel is covered with a sealed optical glass, one end of the mounting groove is provided with a mirror, and the other end of the mounting groove faces the light source.

[0008] Preferably, the mirrors at the ends of the two sets of mounting slots are distributed opposite to each other.

[0009] The method for preparing the filling gel includes the following steps:

[0010] S1: Take glacial acetic acid, polycaprolactone, water and nano silica, and measure out the polycaprolactone, glacial acetic acid aqueous solution and nano silica solution and put them into a plastic centrifuge tube.

[0011] S2: The polymer is fully dissolved in a water bath, thoroughly stirred and mixed, and then allowed to stand in the mold to fully form the gel.

[0012] S3: Use tweezers to place the material in 95% ethanol to wash away excess acetic acid and solvent;

[0013] S4: Place the prepared gel into a vacuum drying oven for depressurization and drying.

[0014] S5: Place the dried gel in sodium hydroxide, wash with deionized water until the film is neutral, and then place it in a vacuum drying oven at the drying temperature until constant weight.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This temperature range indicator for a cold stage that changes color with temperature uses polycaprolactone, which is compatible with a variety of solvents at room temperature and has good plasticity and processability, as a template for the gel system. This not only achieves temperature-indicating and color-developing properties but also increases the processability and practicality of the gel.

[0017] This temperature range indicator for a cold table that changes color with temperature uses the principle of physical color change due to temperature variations. It can indicate the temperature distribution changes over a large area, allowing on-site operators to easily determine the temperature range of the cold table surface by simply observing the color change of the scattered light transmitted through the temperature-indicating material. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0019] Figure 2 This is a top view of the thick aluminum plate structure of the present invention;

[0020] Figure 3 This is a side view of the thick aluminum plate structure of the present invention;

[0021] Figure 4 This is a diagram showing the proportions of raw materials used in the preparation of the chromogenic gel of this invention.

[0022] Figure 5 This is a diagram showing the color change of scattered light caused by temperature variations in the gel of this invention.

[0023] In the diagram: 1. Thick aluminum plate; 2. Bracket; 3. Cold block; 4. Water-cooled hose; 5. Radiator. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example 1: Please refer to Figure 1-5 The present invention provides a technical solution: a cold table temperature range indicator device that can change color with temperature, comprising: a thick aluminum plate 1, brackets 2 provided at the four bottom corners of the thick aluminum plate 1, a cold head 3 installed at the top center of the thick aluminum plate 1, a water-cooling hose 4 connected to the cold head 3, and the other end of the water-cooling hose 4 connected to a radiator 5.

[0026] Please see Figure 2 , 3 The thick aluminum plate 1 also includes: a mounting groove 101, a filling gel 102, an optical glass 103, and a mirror 104. Two sets of mounting grooves 101 are formed on the upper surface of the thick aluminum plate 1. The mounting grooves 101 are filled with filling gel 102. The filling gel 102 is covered with a sealed optical glass 103. A mirror 104 is provided at one end of the mounting groove 101, and the other end of the mounting groove 101 faces the light source.

[0027] Please see Figure 2 , 3 The mirrors 104 at the ends of the two sets of mounting slots 101 are distributed opposite each other. The opposite distribution of the two mirrors 104 can increase the light scattering effect. The two sets of mirrors 104 can be used as a reference for comparison.

[0028] The preparation method of the filling gel includes the following steps:

[0029] S1: Take glacial acetic acid, polycaprolactone, water, and nano-silica. Measure out the polycaprolactone, glacial acetic acid aqueous solution, and nano-silica solution and place them into a plastic centrifuge tube.

[0030] S2: The polymer is fully dissolved in a water bath, thoroughly stirred and mixed, and then allowed to stand in the mold to fully form the gel.

[0031] S3: Use tweezers to place the material in 95% ethanol to wash away excess acetic acid and solvent.

[0032] S4: Place the prepared gel in a vacuum drying oven and dry it under reduced pressure.

[0033] S5: The dried gel is treated in sodium hydroxide to remove excess glacial acetic acid, washed with deionized water until the film is neutral, and then placed in a vacuum drying oven to dry at constant weight.

[0034] Example 2: The preparation method of the filling gel includes the following steps:

[0035] S1: Take glacial acetic acid, polycaprolactone, water, and nano-silica. Measure 1-2g of polycaprolactone, 1:120ml of glacial acetic acid aqueous solution, and 100-300ul of 50mg / ml nano-silica solution and place them into a 50mL plastic centrifuge tube.

[0036] S2: Heat the polymer in a water bath at 40℃-70℃ for 2 hours to fully dissolve it. After thoroughly stirring and mixing, let it stand in the mold for 2 hours to fully form the gel.

[0037] S3: Use tweezers to place the material in 95% ethanol to wash away excess acetic acid and solvent.

[0038] S4: Place the prepared gel in a vacuum drying oven, reduce the pressure to 5 mmHg, and dry at 20-30℃.

[0039] S5: Place the dried gel in 0.1-0.5M sodium hydroxide for 24-48 hours to remove excess glacial acetic acid, wash with deionized water until the film is neutral, and then place it in a vacuum drying oven at 30-40℃ until constant weight.

[0040] Example 3: Unlike Example 1, a cup cover is provided at the bottom center of the thick aluminum plate 1, and a heating platform is provided below the cup cover to heat the thick aluminum plate 1.

[0041] Working principle: such as Figure 1-5 As shown, when using this temperature-sensitive cold table temperature range indicator, the cup cover is first installed under the thick aluminum plate 1. Then, the fixing bracket 2 is installed, and the cold head 3 is connected to the water-cooling hose 4 and the radiator 7, and then correspondingly installed on the thick aluminum plate 1. Next, the filling gel 102 is filled into the mounting groove 101, and the inside of the mounting groove 101 is sealed with an optical glass 103 to isolate the filling gel 102 from the outside air. After installation, the cold table made of the thick aluminum plate is placed above the hot table. When the hot table is heated, the temperature range of the thick aluminum plate 1 can be determined by observing the color change of the filling gel 102. Simultaneously, the light source 305 increases the brightness of the light source while observing the color change of the filling gel 102, and the mirror 104 at the other end increases the diffused light effect, further facilitating on-site operators to determine the temperature range of the cold table surface by simply observing the color change of the scattered light transmitted through the temperature-indicating material. This is the usage process of the temperature-sensitive cold table temperature range indicator.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cold table temperature range indicator that changes color with temperature, comprising: Thick aluminum plate (1), characterized in that: a cup cover is provided at the bottom center of the thick aluminum plate (1), a bracket (2) is provided at the four corners of the bottom of the thick aluminum plate (1), a cold head (3) is installed at the top center of the thick aluminum plate (1), a water-cooling hose (4) is connected to the cold head (3), and the other end of the water-cooling hose (4) is connected to the radiator (5). The thick aluminum plate (1) also includes: mounting groove (101), filling gel (102), optical glass (103) and mirror (104), and two sets of mounting grooves (101) are provided on the upper surface of the thick aluminum plate (1). The preparation method of the filling gel (102) includes the following steps: S1: Take glacial acetic acid, polycaprolactone, water and nano silica, and measure out the polycaprolactone, glacial acetic acid aqueous solution and nano silica solution and put them into a plastic centrifuge tube. S2: The polymer is fully dissolved in a water bath, thoroughly stirred and mixed, and then allowed to stand in the mold to fully form the gel. S3: Use tweezers to place the material in 95% ethanol to wash away excess acetic acid and solvent; S4: Place the prepared gel into a vacuum drying oven for depressurization and drying. S5: Place the dried gel in sodium hydroxide, wash with deionized water until the film is neutral, and then place it in a vacuum drying oven to dry to constant weight.

2. The cold table temperature range indicator device that changes color with temperature according to claim 1, characterized in that: The mounting groove (101) is filled with a filling gel (102), and the filling gel (102) is covered with a sealed optical glass (103). A mirror (104) is provided at one end of the mounting groove (101), and the other end of the mounting groove (101) faces the light source.

3. The cold table temperature range indicator device that changes color with temperature according to claim 1, characterized in that: The mirrors (104) at the ends of the two sets of mounting slots (101) are distributed opposite to each other.

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