TWI654956B - Temperature storage heat storage container - Google Patents

Abstract

The invention provides a temperature indicating heat storage container, which includes an inner bottle for containing a liquid, a temperature-sensitive color-changing heat-storing material layer disposed outside the inner bottle, and a first height provided outside the temperature-sensitive color-changing heat-storing material layer. Molecular layer. The temperature-sensitive color-change heat storage material layer includes a heat-storage material that undergoes a phase change to absorb or release thermal energy, and a temperature-change color-change material that is blended in the heat-storage material and has at least two color changes depending on temperature changes. The first polymer layer includes a wavelength-selective polymer, and the thermochromic heat storage material layer absorbs light passing through the first polymer layer.

Description

Temperature display heat storage container

The invention relates to a temperature display heat storage container, in particular to a display temperature that can simultaneously use the greenhouse effect to extend the holding time, use the color change of the temperature display material to display the temperature, and use the heat storage material to adjust the temperature of the beverage to a drinkable temperature range. Thermal storage container.

With the improvement of living standards, people pay more and more attention to the details of life. Therefore, a variety of products that make life more convenient have been created. Among them, when the season is relatively cold or during outdoor activities such as mountain climbing, camping, and picnics, if the drinks are contained in general containers, users can only drink cold drinks, but cannot drink warm drinks. Therefore, portable pots with thermal insulation effects have been developed. According to a survey of "2017 Global Stainless Steel Insulation Cup Market Development Status and Future Trends", the global stainless steel insulation cup market size in 2016 was close to $ 3.6 billion. It represents a huge business opportunity for insulation cup related products with insulation function.

Most of the thermos bottles on the market reduce the heat conduction, heat convection, and heat radiation to reduce the heat transfer time. However, because the thermal energy is slowly dissipated in one direction, the effect of long-term heat preservation cannot be achieved physically from a physical point of view. Nowadays, most This method overcomes the problem of heat dissipation described above. However, the method of combining the heating device will cause problems such as a complicated process of processing the insulated cup, and an increase in processing costs.

In addition, the general thermos usually does not have the function of displaying temperature, so the user cannot know the temperature of the beverage. However, when the thermos bottle cannot show the temperature, in addition to the risk of oral and esophageal burns, it may also cause health hazards due to frequent drinking of hot drinks. At the same time, it is also easy to miss the best drinking time, which leads to a decrease in the flavor of the beverage felt by the user.

Therefore, it is necessary to develop a temperature display heat storage container capable of simultaneously extending the holding time, displaying the temperature, and adjusting the temperature of the drink to a suitable temperature range.

In view of the above problems, an object of the present invention is to provide a temperature display heat storage container, which can extend the holding time by the greenhouse effect, display the temperature by the color change of the temperature display material, and adjust the beverage temperature to a drinkable temperature range by the heat storage material In order to improve the problems caused by the above-mentioned conventional techniques.

According to the purpose of the present invention, a temperature-indicating heat storage container is provided, which includes: an inner bottle for containing a liquid, a thermochromic heat storage material layer disposed outside the inner bottle, and a thermochromic heat storage material layer disposed outside Of the first polymer layer. The temperature-sensitive color-change heat storage material layer includes a heat-storage material that undergoes a phase change to absorb or release thermal energy, and a temperature-change color-change material that is blended in the heat-storage material and has at least two color changes depending on temperature changes. The first polymer layer includes a wavelength-selective polymer, and the thermochromic heat storage material layer absorbs light passing through the first polymer layer.

Preferably, it further comprises: a second polymer layer disposed outside the first polymer layer and containing a wavelength-selective polymer, and a medium disposed between the first polymer layer and the second polymer layer Floor. The thermosensitive color-change heat storage material layer absorbs light passing through the first polymer layer, the second polymer layer, and the dielectric layer.

Preferably, the dielectric layer is a vacuum layer.

Preferably, the endothermic peak and the exothermic peak of the thermochromic heat storage material layer are between the drinkable temperature range.

Preferably, the drinkable temperature range is between 55 ° C and 65 ° C.

Preferably, the wavelength-selective polymer is a polymer whose visible light transmittance and near-infrared light transmittance are greater than 70% and mid-infrared light transmittance is less than 10%.

Preferably, the thermochromic heat storage material comprises a saturated higher fatty acid.

The temperature indicating heat storage container of the present invention has the following advantages:

(1) The polymer layer and thermochromic heat storage material can effectively absorb the radiant heat of visible light and near-infrared light, and retain the radiant heat of mid-infrared light, so that the polymer layer and thermochromic heat storage material can produce a greenhouse Effect, to extend the holding time of the beverage in the temperature storage container.

(2) The phase change of the temperature-sensing and heat-storing material is used to achieve the temperature display function, to avoid drinking hot drinks, and to allow users to grasp the best time to drink, and reduce the secondary heating situation. save energy.

(3) With the latent heat of solidification of the thermochromic heat storage material layer, the beverage in the temperature display heat storage container can be maintained in a suitable temperature range for a long time, and the temperature display heat storage container has the advantages of heat preservation efficiency and light weight. .

(4) Compared with the materials of commercially available thermos bottles, the polymer layer of the present invention has the advantages of low cost, easy breakage and good processability.

1, 2, 3‧‧‧ temperature storage containers

10‧‧‧ inner bottle

18‧‧‧ fins

20‧‧‧Temperature-sensitive color-change heat storage material layer

30‧‧‧The first polymer layer

40‧‧‧ dielectric layer

50‧‧‧Second polymer layer

60‧‧‧Anti-collision layer

D‧‧‧ diameter

H‧‧‧ height

T‧‧‧thickness

FIG. 1 is a schematic structural diagram of an embodiment of a temperature-storage heat storage container according to the present invention.

FIG. 2 is a schematic structural diagram of another embodiment of a temperature-storage heat storage container according to the present invention.

FIG. 3 is a schematic structural diagram of another embodiment of a temperature-storage heat storage container according to the present invention.

4 to 6 are schematic diagrams of the greenhouse effect of one embodiment of the temperature-storage heat storage container of the present invention.

FIG. 7 and FIG. 8 are schematic structural diagrams of examples of the temperature-storage heat storage container of the present invention, respectively.

FIG. 9 is a radiation characteristic analysis diagram of a polymer layer of an example of a temperature-storing heat storage container according to the present invention.

FIG. 10 is an FTIR and VMS analysis diagram of a polymer layer of an example of a temperature-storage heat storage container according to the present invention.

FIG. 11 is an analysis diagram of the hemisphere radiation properties of the thermosensitive color-change heat storage material layer of the example of the temperature-storage heat storage container of the present invention.

FIG. 12 is a DSC analysis diagram of a thermochromic heat storage material layer of an example of a temperature-storing heat storage container according to the present invention.

FIG. 13 is a schematic diagram showing the temperature of a thermosensitive color-changing heat storage material layer of an example of a temperature display heat storage container of the present invention.

FIG. 14 is a temperature display diagram of an example of a temperature-storage heat storage container according to the present invention.

Fig. 15 is a schematic view of heat preservation of an example of a temperature-storing heat storage container according to the present invention.

FIG. 16 is a thermal insulation curve diagram of an example of a temperature-storing heat storage container according to the present invention.

FIG. 17 is a comparison diagram of thermal simulation and experimental results of an example of a temperature-storing heat storage container according to the present invention.

FIG. 18 is an optimized design diagram of an example of the temperature-storage heat storage container of the present invention.

In order to make the above-mentioned purpose, technical features, and benefits after actual implementation easier for those skilled in the art to understand, it will be described in more detail with examples and drawings in the following. In addition, the dimensions and thicknesses of the constituent members in the drawings are easier to understand and easier to describe, and are arbitrarily represented, but the invention is not limited thereto.

Referring to FIG. 1, it is a schematic structural diagram of an embodiment of a temperature-storage heat storage container according to the present invention. Referring to FIG. 2, it is a schematic structural diagram of another embodiment of the temperature-storage heat storage container of the present invention. Referring to FIG. 3, it is a schematic structural diagram of another embodiment of the temperature-storage heat storage container of the present invention. Part (a) of FIG. 3 is a schematic diagram of the overall structure of another embodiment of the temperature-storage heat storage container of the present invention, and part (a) of FIG. 3 is a schematic view of another embodiment of the temperature-storage heat storage container of the present invention. Sectional view of the overall structure.

As shown in FIG. 1, in one embodiment of the present invention, the temperature-displaying heat storage container 1 of the present invention may include an inner bottle 10, a thermochromic heat storage material layer 20, and a first polymer layer 30.

The inner bottle 10 is used for containing a liquid, and may be formed of stainless steel, glass, ceramic, or any material known to those skilled in the art.

The temperature-sensitive color-change heat-storage material layer 20 may be disposed outside the inner bottle 10 and may include a heat-storage material and a temperature-change-color-change material. The heat storage material may undergo a phase change to absorb or release thermal energy. The source of thermal energy may be internal and / or external heat sources. The thermochromic material may be blended with the heat storage material, and may have at least two color changes depending on the temperature. Therefore, the temperature-sensitive color-change heat storage material layer can have both Use phase change to control temperature and change color to display temperature range. The thermochromic heat storage material layer 20 may include a saturated higher fatty acid to achieve the function of heat storage. The endothermic peak and the exothermic peak of the thermosensitive color-change heat storage material layer 20 may be between the drinkable temperature range. Preferably, the drinkable temperature range is 55 ° C to 65 ° C. That is, the heat absorption peak of the thermochromic heat storage material layer 20 may be about 60 to 65 ° C., and the heat dissipation peak of the thermochromic heat storage material layer 20 may be about 55 to 60 ° C. The temperature-sensitive color-changing heat-storage material layer 20 can quickly inform the user of the temperature of the liquid in the heat-storage container through different color combinations. The thermosensitive color-changing heat storage material layer 20 may further include thermosensitive capsules, and utilize thermosensitive capsules with different colors to display different color combinations at different temperatures. The temperature-sensitive color-changing heat-storage material layer 20 can be provided on the outside of the inner bottle 10 in various shapes to improve the user's perception of the temperature-storage heat-storage container.

The first polymer layer 30 may be disposed outside the thermochromic heat storage material layer 20. The first polymer layer 30 may include a wavelength-selective polymer, and the thermochromic heat storage material layer 20 may absorb light passing through the first polymer layer 30 including the wavelength-selective polymer. The light may include sunlight from the outside and / or other external light. Preferably, the wavelength-selective polymer may have a transmittance of more than 70% in visible light with a wavelength of about 0.4 to 0.75 μm, and a transmittance of near-infrared light with a wavelength of about 0.75 to 1.4 μm in a range of more than 70%. Macromolecules with a wavelength of about 1.4 ~ 3μm, the transmittance of infrared light is less than 10%. Preferably, the thickness of the first polymer layer 30 may be less than 5 mm, and more preferably, the thickness may be less than 3 mm, so as to achieve the filtering function of light using only the wavelength-selective polymers contained therein without absorbing the thermal energy of light. purpose.

As shown in FIG. 2, in another embodiment of the present invention, the temperature-displaying heat storage container 2 of the present invention may further include a dielectric layer 40 and a second polymer layer 50. The second polymer layer 50 may be disposed outside the first polymer layer 30 and may include a wavelength-selective polymer. Preferably, the thickness of the second polymer layer 50 may be less than 5 mm, and more preferably, the thickness may be less than 3 mm, so as to achieve the filtering function of light using only the wavelength-selective polymers contained therein without absorbing the thermal energy of light. purpose. The dielectric layer 40 may be disposed on the first Between the polymer layer 30 and the second polymer layer 50. The thermochromic heat storage material layer 20 can absorb light passing through the first polymer layer 30 containing the wavelength-selective polymer, the dielectric layer 40 and the second polymer layer 50 containing the wavelength-selective polymer. The dielectric layer may be an air layer or a vacuum layer. The wavelength-selective polymer contained in the first polymer layer 30 and the wavelength-selective polymer contained in the second polymer layer 50 may be the same or different.

As shown in parts (a) and (b) of FIG. 3, in another embodiment of the present invention, the temperature-displaying thermal storage container 3 of the present invention may further include an anti-collision layer 60, so that the temperature-displaying thermal storage container 3 Not susceptible to impact and rupture. The temperature indicating heat storage container 3 of the present invention may further include a stopper. The stopper may be formed of stainless steel, plastic, rubber or any material known to those skilled in the art.

The temperature-indicating heat storage container of the present invention uses the phase change phenomenon of the heat storage material and the greenhouse effect generated by the interaction between the heat storage material and the polymer material to achieve a good heat storage effect, and at the same time displays the temperature interval by using temperature-sensitive color change.

Referring to FIG. 4 to FIG. 6, which are schematic diagrams of the greenhouse effect of one embodiment of the temperature-storage heat storage container of the present invention, respectively.

As shown in Figure 4, the general greenhouse effect means that when the short-wavelength radiation of the sun is irradiated into the greenhouse through the glass, the greenhouse absorbs short-wavelength radiation and emits long-wavelength infrared light. However, most of the long-wavelength infrared light cannot pass through the glass, so it is kept in the greenhouse, leading to the effect of increasing the temperature of the greenhouse. The temperature-displaying heat storage container of the present invention also has a greenhouse effect to enhance the heat storage effect of the present invention.

Continuing the above, as shown in FIG. 5, the average solar radiation flux spectrum of AM1.5G and the black body are compared using Planck's law shown in formula (1). The black system is the thermochromic heat storage material layer of the present invention, and its freezing point temperature is about 330K.

Wherein the units of formula (1) is of _W / m ² μm, E bλ is a black body radiation energy (spectral blackbody emissive power), λ is the wavelength of the emitted radiation (wavelength of the radiation emitted), C 1 to 3.74177x10 ⁸ Wμm ⁴ / m ² , C ₂ is 1.43878 × 10 ⁴ μmK, and T _s is an absolute temperature of the surface. The vertical axis is the radiation flux, and the horizontal axis is the wavelength. The solid line represents AM1.5G, and the dashed line represents the 330K black body. The curve of AM1.5G represents the solar radiation flux on the ground, and the drinking temperature of the temperature storage container is about 328K ~ 338K, so it is expressed as 330K. It is known that the property of the ideal thermochromic heat storage material layer is that it can absorb solar radiant heat with a wavelength of less than 2.5 μm, and retain solar radiant heat with a wavelength of more than 2.5 μm in a temperature display heat storage container to form a greenhouse effect.

Continuing the above, as shown in FIG. 6, it can be seen that the range of the absorption rate of the ideal radiation spectrum. When the wavelength is between 0 and 2.5 μm, the ideal absorptivity of the thermochromic heat storage material layer is 1, the ideal transmissivity of the first polymer layer and the second polymer layer is 1, and the ideal combination of the two is ideal. The absorption rate is 1; when the wavelength is greater than 2.5 μm, the ideal absorption rate of the thermochromic heat storage material layer is an arbitrary value, and the ideal transmission rate of the first polymer layer and the second polymer layer is 0. The ideal absorption rate in the integrated region is zero.

Refer to FIG. 7 and FIG. 8, which are schematic structural diagrams of preferred embodiments of the temperature-storage heat storage container of the present invention, respectively.

FIG. 7 shows the multilayer structure of the temperature-storage heat storage container of the present invention. The temperature-storage thermal storage container of the present invention may further include a plurality of contact points. The plurality of contact points may be interposed between the inner bottle and the first polymer layer, so that the temperature-sensitive color-change heat storage material layer can be evenly distributed.

Figure 8 (a) shows a side view of the room temperature heat storage container of the present invention, and Figure 8 (b) shows a top view of the room temperature heat storage container of the present invention. The container does have a multilayer structure as shown in FIG.

Continuing the above, in a preferred embodiment of the present invention, the material of the inner bottle is stainless steel, and the first polymer layer and the second polymer layer both use a chemical formula of (C ₅ O ₂ H ₈ ) _n . molecule. Preferably, n is in the range of 10,000 to 20,000. When n is greater than 20,000, a negative effect that the structure is brittle and prone to cracks is generated; when n is less than 10,000, a negative effect that the mechanical strength is weakened is generated.

Preferably, the material of the thermochromic heat storage material layer may include a saturated higher fatty acid with a weight percentage of 85% to 95% compared to the total weight of the thermochromic heat storage material layer. When the weight ratio is higher than 95%, the content of saturated higher fatty acid is too high, which will produce the negative effect of the color display and change of the thermochromic material. When the weight ratio is lower than 85%, the content of saturated higher fatty acid is too low. It has the negative effect of reducing the total phase change enthalpy too much. Preferably, the saturated higher fatty acid may be palmitic acid (C ₁₆ H ₃₂ O ₂ ).

Preferably, the thermochromic heat storage material layer may further include a material selected from the group consisting of Melamine Formaldehyde Resin, 3-N-p-tolyl-N-ethylamino-7-methylfluorane (3- Np-tolyl-N-ethylamino-7-methyl-fluoran), bisphenol A (4,4-Isopropylidenediphenol, Bisphenol A), 1-hexadecanol (1-Hexadecanol), 1-octadecanol , 1-docosanol, and combinations thereof.

In the example of the present invention, the material of the inner bottle is selected from 304 stainless steel, and the first polymer layer and the second polymer layer both use a polymer having a chemical formula of (C ₅ O ₂ H ₈ ) _n , where n is 10000 ~ 20000. The thermochromic heat storage material layer includes a red temperature display material and a blue temperature display material. The red temperature display material has 90% palmitic acid and 10% red temperature sensitive material. The red temperature-sensitive material has 1 to 5% melamine resin, 2 to 10% of 3-N-p-tolyl-N-ethylamino-7-methylfluorane, and 5 to 15% of bisphenol A. , 10-15% 1-hexadecanol, 15-25% 1-octadecanol, and 25-40% 1-icosanediol. Among them, the red temperature display material is bright red when the temperature is lower than 55 ° C; it is light pink when the temperature is higher than 55 ° C. The blue temperature display material has 90% palmitic acid and 10% blue temperature sensing material. The blue thermosensitive material has 1 to 5% melamine resin, and 2 to 10% of 3- (4-dimethylamino-2-ethoxyphenyl) -3- (1-ethyl-2-methyl Indole-3-yl) -4-azaphthalide (3- (4-Dimethylamino-2-ethoxyphenyl) -3- (1-ethyl-2-methylindol-3-yl) -4-azaphthalide), 5 ~ 15% bisphenol A, 25 ~ 40% 1-octadecanol and 25 ~ 40% 1-icosanediol. Among them, the blue temperature display material is displayed as dark blue when the temperature is lower than 65 ° C, and displayed as light blue when the temperature is higher than 65 ° C.

Following the above, the analysis of the first polymer layer, the second polymer layer, and the thermochromic heat storage material layer according to an example of the present invention is performed. Since the first polymer layer used in this example is the same as the second polymer layer, it will be referred to as a polymer layer in the following.

Analysis of polymer layer

Referring to FIG. 9, it is a radiation property analysis chart of a polymer layer of an example of a temperature-storage heat storage container of the present invention. As shown in the figure, a polymer with a thickness of 1.6 mm is used as the polymer layer for testing. It can be seen that when the wavelength is less than 2.2 μm, it has high transmittance, and when the wavelength is greater than 2.2 μm, the transmittance is almost 0.1. In the following, the representative polymer layer can effectively absorb the radiant heat of visible light and near-infrared light, and retain the radiant heat of mid-infrared light, so as to produce a greenhouse effect in the temperature display thermal storage container and extend the holding time.

Refer to FIG. 10, which is an FTIR and VMS analysis diagram of an example of a temperature-storage heat storage container according to the present invention. As shown in the figure, using a polymer with a thickness of 3mm as the polymer layer to test at an incident angle of 0 degrees, it can be seen that when the polymer layer is measured by FTIR or VMS, when the wavelength is greater than 2.2 μm, The transmittance is almost 0; and at a wavelength of 0.4 μm to 1.5 μm, the transmittance is as high as 0.85 or more, which also means that the polymer layer can produce a greenhouse effect.

Analysis of temperature-sensitive color-change heat storage material layer

Referring to FIG. 11, it is an analysis diagram of hemispherical radiation properties of a thermochromic heat storage material layer of an example of a temperature-storing heat storage container according to the present invention. Using a polymer with a thickness of 3mm as the polymer layer to test at an incident angle of 8 degrees, it can be seen that an absorption peak appears in the visible light region with a wavelength of 0.4 μm to 0.7 μm, and the absorption rate can reach 0.98, and the wavelength is 1.4 μm. In the near-infrared light region of ~ 0.8 μm, an absorption peak also appears, and its absorption rate can reach more than 0.5. Therefore, the thermochromic heat storage material layer of the present invention can effectively absorb solar radiation.

Referring to FIG. 12, it is a DSC analysis diagram of a thermochromic heat storage material layer of an example of a temperature display heat storage container of the present invention. Figure 12 shows the complete cycle including heating up and cooling down. It is known that when the temperature rises to about 63.72 ° C, the thermochromic heat storage material layer starts to melt and generate an endothermic peak, and its latent heat of fusion (△ H _m ) is 169.29J / g, so the endothermic effect caused by the phase change can be used The temperature of the temperature-storage container is reduced to about 63.72 ℃; when the temperature is reduced to 59.41 ℃, the latent heat of solidification (△ H _f ) is -166.51J / g, and the thermochromic heat storage material layer begins to solidify and generate an exothermic peak Therefore, the exothermic effect caused by the phase change can be used to release the stored heat energy, and the liquid of the temperature storage container can be maintained at about 60 ° C. In addition, the latent heat of solidification of the temperature-sensitive color-changing heat-storage material layer is large, so a small amount of the temperature-sensitive color-changing heat-storage material can maintain the temperature in the temperature-displaying heat storage container.

Reference is made to FIG. 13, which is a schematic diagram showing the temperature of a thermochromic heat storage material layer of an example of a temperature display heat storage container of the present invention. Figure 13 shows the temperature display of the red temperature display material and the blue temperature display material at different temperatures, respectively. As shown in the central area of part (a) and part (b) of Figure 13, at 70 ° C, the red and blue materials show a lighter color, which means that the temperature is too high and the beverage flavor Poor and prone to health hazards. As shown in the center area of Fig. 13 (c), at 60 ° C, the blue temperature display material is dark blue, and as shown in the center area of Fig. 13 (d), the red temperature display material is pale pink. , Which means that the temperature is moderate, in addition to allowing users to taste the best drinking temperature, It can cause health hazards due to the high temperature of the beverage. As shown in part (e) of Fig. 13, at 50 ° C, the blue temperature-indicating material appears dark blue, and as shown in the center area of part (f) of Fig. 13, the red temperature-indicating material appears bright red, indicating the temperature Lower, the flavor of the drink is not good at this time.

Refer to FIG. 14, which is a schematic diagram showing the temperature of an example of the temperature-storage heat storage container of the present invention. As shown in part (a) of Fig. 14, when the temperature of the liquid in the temperature storage container is less than 55 ° C, it is bright red; as shown in part (b) of Fig. 14, when the temperature in the temperature storage container is When the liquid temperature is 55 ℃ ~ 65 ℃, it will be light red.

Referring to FIG. 15, it is a schematic diagram of heat preservation of an example of the temperature-storage heat storage container of the present invention. The experiment time is January 15, 2018, 10:00 am to 5:00 pm, and the location is Hsinchu City. The high-temperature liquid at 85 ° C is placed in the temperature-storage thermal storage container and the commercially available thermos bottle of the present invention. Observe the changes in water temperature over time in the sun and compare them. As shown in Fig. 15, it can be seen that the water temperature of the commercially available thermos bottle decreases almost linearly, it drops to the drinking temperature range in about 4 hours, and is maintained for 3 hours. However, the temperature-storage thermal storage container of the present invention is reduced to 67 ° C. in about 5 minutes, and is maintained for approximately 6 hours in a temperature range suitable for drinking. Representatively, the maintaining time of the temperature-suitable temperature range of the temperature-storage thermal storage container of the present invention is twice that of the commercially available thermos.

Referring to FIG. 16, it is a thermal insulation curve diagram of an example of a temperature-storing heat storage container according to the present invention. In the absence of solar radiation, the vertical axis is the temperature, the horizontal axis is the time, and the temperature range from 55 ° C to 65 ° C is the drinkable temperature range. (A) is a commercially available thermos flask, and (b) is the temperature storage of the present invention. Hot container. As shown in part (a) of FIG. 16, the temperature of the commercially available thermos flask decreases linearly with time. It takes about 40 minutes to reach the drinkable temperature, and it is maintained for only 36 minutes in the drinkable temperature range. As shown in part (b) of FIG. 16, the temperature-storage thermal storage container of the present invention only needs to wait for 7 minutes to drink, and maintains it for 63 minutes in a temperature range suitable for drinking.

Refer to FIG. 17, which is a comparison diagram of thermal simulation and experimental results of an example of a temperature-storing heat storage container according to the present invention. Using COMSOL Multiphysics ^® software, its fin heat transfer module supports the simulation of multiple radiation phenomena, and it includes a dedicated solver to simulate thermal radiation coupled convection and conduction, and input the geometric parameters, material parameters and boundary conditions of the temperature storage container, And simplified in limited computing resources. Among them, the material parameters include the thermal conductivity of the stainless steel inner bottle, the permeability of the polymer layer, the thermal conductivity of the polymer layer, the absorption rate of the thermochromic heat storage material layer, and the thermal conductivity of the thermochromic heat storage material layer. rate. Among them, the boundary conditions include solar irradiance, ambient temperature and ambient thermal convection coefficient. Compare the water temperature of the temperature indicating thermal storage container at each time point with the simulation and the experimental results in Fig. 15 and verify the correctness of the simulation to facilitate the optimal design of the temperature indicating thermal storage container of the present invention. .

As shown in Figure 17, it can be seen that the temperature changes of the actual value and the simulated value are close to each other over time. In the course of 420 minutes, the error of the average temperature is within 2 ° C, which indicates that the simulation system can correctly simulate the temperature. The actual state of the invented temperature storage container.

Refer to FIG. 18, which is an optimized design diagram of an example of the temperature-storage heat storage container of the present invention. A level gauge is designed for the temperature-storage heat storage container of the present invention. Based on the 500mL temperature display heat storage container, the three factors of the shape of the temperature storage container, the quantity of fins, and the fin shape are selected. Each factor sets three levels. Furthermore, the orthogonal table is designed to perform the Taguchi method optimization experiment. Since there are three factors with three levels, the L ₉ (3 ⁴ ) orthogonal table is selected and a total of 9 experiments are performed. Continue to design the adaptation function to obtain the optimal parameters. In this example, in addition to considering temperature adjustment and holding time, it is also designed for outdoor carry-on containers, so the weight of the temperature storage container is further considered. Finally, a factor response table will be obtained by calculating the result of the adaptation function, and the factor response table will be used to find out the sensitive factors and optimization parameters.

As shown in part (a) and part (b) of FIG. 18, it can be seen that the optimization parameters are the diameter D / height H of the stainless steel inner bottle of 60mm / 180mm, and the thickness T of the thermochromic heat storage material layer is 6.5mm. As shown in part (c) of FIG. 18, the number of fins 18 is five, the length / thickness of the fins is 5.5mm / 5.5mm, and the cross-section of the annular fin is rectangular. The optimized temperature display heat storage container has the advantages of reducing the liquid at 85 ° C to 65 ° C within 5 minutes, maintaining the drinkable temperature interval for more than 300 minutes, and the total weight of only 800g.

In summary, the temperature-displaying heat storage container of the present invention can simultaneously use the greenhouse effect to extend the holding time, use color changes to display the temperature, and adjust the temperature of the drink to a suitable temperature range, and also can adjust the first polymer layer, the first The proportion of two polymer layers and thermochromic heat storage materials to meet the needs of various users.

The above description is exemplary only, and not restrictive. Any equivalent modification or change made without departing from the spirit and scope of the present invention shall be included in the scope of patent application.

Claims (7)

A temperature-indicating heat-storage container includes: an inner bottle for containing a liquid; a temperature-sensitive color-changing heat-storage material layer disposed outside the inner bottle; and comprising: a heat-storage material that undergoes a phase change to absorb or Dissipating thermal energy; and a thermochromic material mixed with the thermal storage material and having at least two color changes depending on the temperature; and a first polymer layer disposed outside the thermochromic thermal storage material layer Wherein, the first polymer layer includes a wavelength-selective polymer, and the thermochromic heat storage material layer absorbs light passing through the first polymer layer. The temperature-storage heat storage container according to item 1 of the scope of the patent application, further comprising: a second polymer layer disposed outside the first polymer layer and containing the wavelength-selective polymer; and a dielectric layer Is disposed between the first polymer layer and the second polymer layer, wherein the temperature-sensitive color-change heat storage material layer absorbs through the first polymer layer, the second polymer layer, and the dielectric layer Light. The temperature-storage heat storage container according to item 2 of the scope of patent application, wherein the medium layer is a vacuum layer. The temperature-displaying heat storage container according to any one of claims 1 to 3, wherein the heat-absorbing and exothermic peak of the thermochromic heat-storing material layer is between a drinkable temperature range. The temperature-displayed heat storage container according to item 4 of the scope of patent application, wherein the drinkable temperature range is between 55 ° C and 65 ° C. The temperature-displaying heat storage container according to any one of claims 1 to 3, wherein the wavelength-selective polymer is a visible light transmittance and a near-infrared light transmittance greater than 70% and a mid-infrared light transmission Polymers with a permeability of less than 10%. The temperature-displaying heat storage container according to any one of claims 1 to 3, wherein the thermochromic heat storage material comprises a saturated higher fatty acid.