Vaporized phase change material assembly

Abstract

The invention discloses a vaporized phase-change material assembly which is formed by assembling an inner core and a shell, the inner core comprises a vaporized phase-change material layer (1), and the vaporized phase-change material layer is of an integrated structure composed of an upper vaporized phase-change material section (11), a side vaporized phase-change material section (12) and a lower vaporized phase-change material section (13). The upper vaporizing phase-change material section, the side vaporizing phase-change material section and the lower vaporizing phase-change material section form a wrapping cavity, a vapor absorption material layer (2), a heat insulation layer (3) and a liquid-vapor control material layer (4) are sequentially arranged in the wrapping cavity from top to bottom, and a vaporizing phase-change temperature guiding and regulating material layer (5) is arranged below the lower vaporizing phase-change material section. The problem of temperature control failure caused by cooling and freezing can be effectively solved, the situation that the change of the environment temperature influences the vaporization phase change temperature is reduced, phase change temperature control is accurate, and the heat preservation effect is good.

Description

Technical Field

[0001] The invention relates to the technical field of phase change energy storage, and in particular to a vaporization phase change material component. Background Art

[0002] In the application of phase change materials, if the phase change materials are to play a role in temperature control, they must first store cold (or heat). Cold storage (or heat storage) requires cooling and heating equipment and sites to operate, which will greatly restrict the use of end consumers.

[0003] It is necessary to cancel the operation of cold storage (or heat storage) to improve the convenience of cold chain packaging. At present, water is used to vaporize and cool down after reducing the vacuum degree. Although this method can cool down, it will be greatly affected by the environment. The temperature inside the incubator will change according to the temperature of the environment. For example, when the ambient temperature rises and falls, the internal temperature will also rise and fall. Therefore, the rated ambient temperature is required to control the required temperature, and it may only be used for 1-2 months a year. This problem greatly limits the usage scenarios. In addition, if the vaporization process of water is not controlled, the temperature inside the incubator will continue to drop below 0 degrees, causing the steam outlet to freeze, affecting the temperature control effect.

[0004] To solve the problem of unstable temperature control, the most commonly used method is to increase the thickness of the insulation layer. However, this method can only control for a short time, and the same problem will occur if the ambient temperature changes for a long time. Summary of the invention

[0005] The object of the present invention is to provide a vaporization phase change material component, which can effectively solve the problem of temperature control failure caused by cooling and icing.

[0006] The technical solution adopted by the present invention to solve its technical problem is: A vaporization phase change material component is assembled from an inner core and an outer shell, the inner core comprising a vaporization phase change material layer (1), the vaporization phase change material layer being an integrated structure consisting of an upper vaporization phase change material segment (11), a side vaporization phase change material segment (12) and a lower vaporization phase change material segment (13), the upper vaporization phase change material segment, the side vaporization phase change material segment and the lower vaporization phase change material segment forming a wrapping cavity, the wrapping cavity being provided with a vapor absorption material layer (2), a heat insulation layer (3) and a liquid vapor control material layer (4) in sequence from top to bottom, and a vaporization phase change temperature guiding and regulating material layer (5) being provided below the lower vaporization phase change material segment; The outer shell is composed of a high-barrier plastic film box (6) and a vacuum sealing film (7). A vaporization start button (8) with a pressing needle capable of piercing the lower vaporization phase change material section is provided at the bottom of the high-barrier plastic film box. After the inner core is assembled in the high-barrier plastic film box, a vacuum is drawn and the box is sealed with the vacuum sealing film.

[0007] A through hole is provided on the vaporization phase change temperature guiding and regulating material layer corresponding to the needle of the vaporization start button, so that the needle of the vaporization start button can pass through the vaporization phase change temperature guiding and regulating material layer to pierce the outer packaging film of the lower vaporization phase change material section. After the outer packaging film of the lower vaporization phase change material section is damaged, the vaporization phase change material vaporizes and changes phase under vacuum through breaking the air, providing cooling. As time goes by, the vaporization phase change material in the lower vaporization phase change material section is consumed, and the vaporization phase change material in the upper vaporization phase change material section and the side vaporization phase change material section is replenished to the lower vaporization phase change material section under the action of gravity.

[0008] To solve the problem that the temperature inside the incubator has been dropping below the freezing point, it is necessary to accurately control the boiling point and freezing point of the vaporized phase change material under low vacuum. In order to solve the problem that the steam outlet freezes due to low temperature, resulting in temperature control failure, the present invention adopts an improved inorganic salt phase change material. A vaporization temperature regulator is added to make the vaporization temperature close to 2-8°C, so that the water droplets in the liquid-vapor control material layer can avoid freezing, and avoid the problem of temperature control failure caused by freezing.

[0009] In addition, in order to solve the influence of the internal vaporization phase change temperature changing with the change of ambient temperature, the present invention innovatively introduces the vaporization phase change temperature guiding and regulating material in the component. This material is a fixed temperature control material, and the corresponding phase change temperature can be formulated according to the temperature that needs to be controlled. When the ambient temperature rises, this vaporization phase change temperature guiding and regulating material will release the cold energy absorbed by vaporization, and accurately control the temperature to be controlled. When the ambient temperature drops, it will absorb the excess cold energy, and accurately control the temperature to be controlled at the temperature that needs to be controlled.

[0010] Preferably, the vaporized phase change material layer is formed by pouring the vaporized phase change material into a plastic bag, evacuating the bag, and sealing the bag; The vaporization phase change material is composed of a vaporization phase change main material and a vaporization temperature regulator, wherein the content of the vaporization phase change main material is 20-50wt%, and the content of the vaporization temperature regulator is 50-80wt%. The vaporization phase change material layer is vacuumed during packaging in order to achieve better vaporization.

[0011] Preferably, the main vaporization phase change material is a low supercooling inorganic salt phase change energy storage material; the vaporization temperature regulator is a water solution with a mass concentration of 20-50% (total mass concentration) formed by compounding one or more of methanol, ethanol, ethylene glycol, acetone, propionaldehyde, and acetaldehyde. The main vaporization phase change material of the present invention is a low supercooling inorganic salt phase change energy storage material, and the low supercooling inorganic salt phase change energy storage material adopts the material disclosed in the applicant's prior authorized patent: Patent No. ZL202110696386.4, named a low supercooling inorganic salt phase change energy storage material.

[0012] Preferably, the vapor absorbing material layer is made of calcium chloride, activated carbon or a mixture of the two materials.

[0013] Preferably, the material of the thermal insulation layer is ceramic fiber thermal insulation wool or glass fiber thermal insulation wool.

[0014] Preferably, the liquid vapor control material layer is composed of absorbent paper, PP or PE isolation net, PP filter cotton, and graphite sheet from top to bottom. The graphite sheet in the liquid vapor control material layer is used to make the temperature distribution uniform to avoid local overcooling and ice formation; the other layers are to prevent water vapor from entering the vapor absorption material layer too quickly and excessively, causing the insulation layer to be filled with wet water vapor and affect the heat preservation.

[0015] Preferably, the material of the vaporization phase change temperature guiding and regulating material layer is: obtained by esterification reaction of 100 parts by weight of C12-C13 saturated alkanol, 100 parts by weight of carboxyl-modified SBS, 10 parts by weight of graphite and 0.05-0.5 parts by weight of 98wt% concentrated sulfuric acid, the esterification reaction temperature is controlled at 80-90°C, and the reaction time is 8-10 hours; The raw material composition of the carboxyl modified SBS is as follows by weight: 100 parts of SBS, 100-105 parts of thioglycolic acid, 0.05-0.5 parts of azo initiator, 0.1-0.5 parts of antioxidant, and 1000-2000 parts of organic solvent.

[0016] The material of the vaporization phase change temperature guiding and regulating material layer of the present invention is improved on the basis of the applicant's prior application CN118667100A, a shaped phase change material for 2~8℃ temperature control, and graphite is added to increase the thermal conductivity to be more suitable for regulating the vaporization phase change temperature. The present invention utilizes the 2~8℃ temperature control property of the material as a solution to regulate the influence of environmental factors on vaporization, so that the vaporization phase change temperature is not affected by the change of ambient temperature without strengthening the heat preservation, greatly improving the use effect of the vaporization phase change material.

[0017] Preferably, the antioxidant is a mixture of antioxidant 1076 and antioxidant 168, and the mass ratio of antioxidant 1076 to antioxidant 168 is 7:3; the organic solvent is one or more of 1,2-dichloromethane, 1,2-dichloroethane, and cyclohexane.

[0018] Preferably, the high barrier plastic film box material is a composite film formed by at least three of PP, PE, PA, EVOH and PET, and the thickness of the composite film is greater than 0.3 mm.

[0019] Preferably, the mass ratio of vaporization phase change temperature guiding and regulating material: vaporization phase change material is 0.5~2:9.5~8; the mass ratio of vaporization phase change material: vapor absorption material is 1.5~3:8.5~7.

[0020] The beneficial effects of the present invention are: it can effectively solve the problem of temperature control failure caused by cooling and icing, reduce the impact of ambient temperature changes on vaporization phase change temperature, accurately control the phase change temperature, and have a good thermal insulation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 This is the temperature test result of Example 3.

[0023] Figure 3 It is the temperature test result of the comparison ratio. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described in detail below through specific embodiments.

[0025] In the present invention, unless otherwise specified, the raw materials and equipment used can be purchased from the market or are commonly used in the art. The methods in the following embodiments, unless otherwise specified, are all conventional methods in the art.

[0026] Embodiment 1: Preparation of materials guided by vaporization phase transition temperature: (1) Carboxyl modification of SBS materials 50g of SBS (LG Chemical, molecular weight 250,000 g / mol), 500g of cyclohexane, 0.035g of antioxidant 1076, 0.015g of antioxidant 168, and 50g of thioglycolic acid were stirred and dissolved, and 0.05g of initiator (azobisisobutyronitrile) was added and dispersed evenly, and then frozen at -10℃ for 5 minutes, and then vacuumed and heated to 60℃ for 16 hours. After the reaction, the reactants were slowly poured into a container containing 3000g of industrial ethanol, and about 45g of white carboxyl grafted product was obtained by precipitating and filtering. 135g of cyclohexane was added to the carboxyl grafted product, stirred, and filtered, and placed in a vacuum oven at 50℃ for 10 hours to obtain about 43g of carboxyl grafted modified SBS.

[0027] (2) Preparation of grafted phase change materials 43g of carboxyl-modified SBS was added with 43g of dodecanol, 4.3g of graphite and 0.043g of concentrated sulfuric acid (98%) in a three-necked flask, and the temperature was raised to 85°C and stirred (stirring speed: 80 rpm). Condensed water was passed to control the reaction temperature at 85°C. After reacting for 8 hours, the mixture was filtered and washed three times with a 25% sodium chloride aqueous solution to obtain a vaporization phase change temperature guiding and regulating material.

[0028] Embodiment 2: Preparation of materials guided by vaporization phase transition temperature: (1) Carboxyl modification of SBS materials 50g of SBS (LG Chemical, molecular weight 200,000 g / mol), 1000g of cyclohexane, 0.175g of antioxidant 1076, 0.075g of antioxidant 168, and 52.5g of thioglycolic acid were stirred and dissolved, and 0.25g of initiator (azobisisobutyronitrile) was added and dispersed evenly, and then frozen at -10°C for 5 minutes, and then vacuumed and heated to 60°C for 16 hours. After the reaction, the reactants were slowly poured into a container containing 5500g of industrial ethanol, and the white carboxyl grafted product was obtained by precipitating and filtering. 150g of cyclohexane was added to the carboxyl grafted product, stirred, and then filtered, and placed in a vacuum oven at 50°C for 10 hours to obtain carboxyl grafted modified SBS.

[0029] (2) Preparation of grafted phase change materials 36g of carboxyl-modified SBS was added with 36g of dodecanol, 3.6g of graphite and 0.18g of concentrated sulfuric acid (98%) in a three-necked flask, and the temperature was raised to 90°C and stirred (stirring speed: 80 rpm). Condensed water was passed to control the reaction temperature at 90°C. After reacting for 10 hours, the mixture was filtered and washed three times with a 25% aqueous sodium chloride solution to obtain a vaporization phase change temperature guiding and regulating material.

[0030] Embodiment 3: like Figure 1 A vaporization phase change material component is shown, which is assembled from an inner core and an outer shell, wherein the inner core includes a vaporization phase change material layer 1, and the vaporization phase change material layer is an integrated structure consisting of an upper vaporization phase change material segment 11, a side vaporization phase change material segment 12, and a lower vaporization phase change material segment 13. The upper vaporization phase change material segment, the side vaporization phase change material segment, and the lower vaporization phase change material segment form a wrapping cavity, in which a vapor absorption material layer 2, a heat insulation layer 3, and a liquid vapor control material layer 4 are sequentially arranged from top to bottom, and a vaporization phase change temperature guiding and regulating material (prepared in Example 1) layer 5 is arranged under the lower vaporization phase change material segment. A through hole is arranged on the vaporization phase change temperature guiding and regulating material layer corresponding to the needle of the vaporization start button, so that the needle 81 of the vaporization start button can pass through the vaporization phase change temperature guiding and regulating material layer to pierce the outer packaging film of the lower vaporization phase change material segment.

[0031] The shell is composed of a high-barrier plastic film box 6 and a vacuum sealing film 7. A vaporization start button 8 with a pressing needle capable of piercing the lower vaporization phase change material section is provided at the bottom of the high-barrier plastic film box. After the inner core is assembled in the high-barrier plastic film box, it is evacuated and sealed with a vacuum sealing film (aluminum foil / PET / PE composite film with a thickness of 0.5 mm, wherein the aluminum foil is 0.3 mm thick, the PET is 0.1 mm thick, and the PE is 0.1 mm thick, commercially available).

[0032] The mass ratio of vaporization phase change temperature guiding and regulating material: vaporization phase change material is 1:8; the mass ratio of vaporization phase change material: vapor absorption material is 2:8.

[0033] The vaporization phase change material layer is formed by pouring the vaporization phase change material into a plastic bag, evacuating the bag, and sealing the bag; the vaporization phase change material is formed by mixing the vaporization phase change main material and the vaporization temperature regulator (20% methanol aqueous solution) and stirring them at room temperature for 30 minutes, wherein the content of the vaporization phase change main material (prepared in Specific Implementation Plan 1 of ZL202110696386.4) is 30wt%, and the content of the vaporization temperature regulator is 70wt%.

[0034] The vapor absorbing material layer is obtained by putting a mixture of calcium chloride and activated carbon in a mass ratio of 9:1 into a non-woven bag.

[0035] The material of the heat insulation layer is ceramic fiber heat insulation cotton (25 mm thick, commercially available).

[0036] The liquid-vapor control material layer is composed of absorbent paper, a PP isolation net (0.3 mm), PP filter cotton (3 mm), and a graphite sheet (0.3 mm) from top to bottom.

[0037] The high barrier plastic film box material is a composite film of PA / EVOH / PE with a thickness of 0.3 mm, wherein the thickness of PA is 0.1 mm, the thickness of EVOH is 0.1 mm, and the thickness of PE is 0.1 mm, which is commercially available.

[0038] Embodiment 4: A vaporization phase change material component is assembled from an inner core and an outer shell, wherein the inner core includes a vaporization phase change material layer 1, and the vaporization phase change material layer is an integrated structure consisting of an upper vaporization phase change material segment 11, a side vaporization phase change material segment 12, and a lower vaporization phase change material segment 13. The upper vaporization phase change material segment, the side vaporization phase change material segment, and the lower vaporization phase change material segment form a wrapping cavity, in which a vapor absorption material layer 2, a heat insulation layer 3, and a liquid vapor control material layer 4 are arranged in sequence from top to bottom, and a vaporization phase change temperature guiding and regulating material (prepared in Example 2) layer 5 is arranged under the lower vaporization phase change material segment.

[0039] The shell is composed of a high-barrier plastic film box 6 and a vacuum sealing film 7. A vaporization start button 8 with a pressing needle capable of piercing the lower vaporization phase change material section is provided at the bottom of the high-barrier plastic film box. After the inner core is assembled in the high-barrier plastic film box, it is evacuated and sealed with a vacuum sealing film (aluminum foil / PET / PE composite film with a thickness of 0.3 mm, wherein the aluminum foil is 0.1 mm thick, the PET is 0.1 mm thick, and the PE is 0.1 mm thick, commercially available).

[0040] The mass ratio of vaporization phase change temperature guiding and regulating material: vaporization phase change material is 0.5:8; the mass ratio of vaporization phase change material: vapor absorption material is 1.5:7.

[0041] The vaporization phase change material layer is formed by pouring the vaporization phase change material into a plastic bag, evacuating the bag, and sealing the bag; the vaporization phase change material is formed by mixing the vaporization phase change main material and the vaporization temperature regulator (50% ethanol aqueous solution) and stirring them at room temperature for 30 minutes, wherein the content of the vaporization phase change main material (prepared in Specific Implementation Plan 2 of ZL202110696386.4) is 50wt%, and the content of the vaporization temperature regulator is 50wt%.

[0042] The vapor absorbing material layer is obtained by putting calcium chloride into a non-woven bag.

[0043] The material of the heat insulation layer is glass fiber heat insulation cotton (25 mm thick, commercially available).

[0044] The liquid-vapor control material layer is composed of absorbent paper, a PE isolation net (0.3 mm), PP filter cotton (3 mm), and a graphite sheet (0.3 mm) from top to bottom.

[0045] The high barrier plastic film box material is a PE / PET / PA composite film with a thickness of 0.6 mm, wherein the thickness of PE is 0.2 mm, the thickness of PET is 0.2 mm, and the thickness of PA is 0.2 mm, which is commercially available.

[0046] Embodiment 5: The difference between this embodiment and embodiment 3 is that the mass ratio of vaporization phase change temperature guiding and regulating material: vaporization phase change material is 2:9.5; the mass ratio of vaporization phase change material: vapor absorption material is 3:8.5.

[0047] Embodiment 6: The difference between this embodiment and embodiment 3 is that the vaporization temperature regulator is a mixed aqueous solution of methanol and acetone, wherein methanol is 20% and acetone is 10%.

[0048] Embodiment 7: The difference between this embodiment and embodiment 3 is that the content of the vaporization phase change main material (prepared according to specific implementation scheme 1 of ZL202110696386.4) is 20wt%, and the content of the vaporization temperature regulator is 80wt%.

[0049] Comparative Example The difference between this example and Example 3 is that the vaporization phase change material uses water, and no vaporization phase change temperature guiding and regulating material layer is provided.

[0050] Depend on Figure 2 and Figure 3By comparison, the present invention can effectively solve the problem of temperature control failure caused by cooling and icing through the improvement of vaporization phase change material and vaporization phase change temperature guiding and regulating material layer, and reduce the impact of ambient temperature changes on vaporization phase change temperature.

[0051] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. A vaporization phase change material component, characterized in that: The inner core and the outer shell are assembled, the inner core comprising a vaporization phase change material layer (1), the vaporization phase change material layer being an integrated structure consisting of an upper vaporization phase change material segment (11), a side vaporization phase change material segment (12) and a lower vaporization phase change material segment (13), the upper vaporization phase change material segment, the side vaporization phase change material segment and the lower vaporization phase change material segment forming a wrapping cavity, the wrapping cavity being provided with a vapor absorption material layer (2), a heat insulation layer (3) and a liquid vapor control material layer (4) in sequence from top to bottom, and a vaporization phase change temperature guiding and regulating material layer (5) being provided below the lower vaporization phase change material segment; The outer shell is composed of a high-barrier plastic film box (6) and a vacuum sealing film (7). A vaporization start button (8) with a pressing needle capable of piercing the lower vaporization phase change material section is provided at the bottom of the high-barrier plastic film box. After the inner core is assembled in the high-barrier plastic film box, a vacuum is drawn and the box is sealed with the vacuum sealing film.

2. A vaporization phase change material component according to claim 1, characterized in that: The vaporized phase change material layer is formed by pouring the vaporized phase change material into a plastic bag, evacuating the bag, and sealing the bag; The vaporization phase change material is composed of a vaporization phase change main material and a vaporization temperature regulator, wherein the content of the vaporization phase change main material is 20-50wt%, and the content of the vaporization temperature regulator is 50-80wt%.

3. A vaporization phase change material component according to claim 2, characterized in that: The main vaporization phase change material is a low supercooling inorganic salt phase change energy storage material; the vaporization temperature regulator is a water solution with a mass concentration of 20-50% formed by combining one or more of methanol, ethanol, ethylene glycol, acetone, propionaldehyde, and acetaldehyde.

4. A vaporization phase change material component according to claim 1, characterized in that: The material of the vapor absorption material layer is calcium chloride, activated carbon or a mixture of the two materials.

5. The vaporization phase change material component according to claim 1, characterized in that: The material of the heat insulation layer is ceramic fiber heat insulation wool or glass fiber heat insulation wool.

6. The vaporization phase change material component according to claim 1, characterized in that: The liquid-vapor control material layer is composed of absorbent paper, a PP or PE isolation net, PP filter cotton, and a graphite sheet from top to bottom.

7. The vaporization phase change material component according to claim 1, characterized in that: The material of the vaporization phase change temperature guiding and regulating material layer is: obtained by esterification reaction of 100 parts by weight of C12-C13 saturated alkanol, 100 parts by weight of carboxyl-modified SBS, 10 parts by weight of graphite and 0.05-0.5 parts by weight of 98wt% concentrated sulfuric acid, the esterification reaction temperature is controlled at 80-90°C, and the reaction time is 8-10 hours; The raw material composition of the carboxyl modified SBS is as follows by weight: 100 parts of SBS, 100-105 parts of thioglycolic acid, 0.05-0.5 parts of azo initiator, 0.1-0.5 parts of antioxidant, and 1000-2000 parts of organic solvent.

8. A vaporization phase change material component according to claim 7, characterized in that: The antioxidant is a mixture of antioxidant 1076 and antioxidant 168, and the mass ratio of antioxidant 1076 to antioxidant 168 is 7:3; the organic solvent is one or more of 1,2-dichloromethane, 1,2-dichloroethane, and cyclohexane.

9. The vaporization phase change material component according to claim 1, characterized in that: The high barrier plastic film box material is a composite film formed by at least three of PP, PE, PA, EVOH and PET, and the thickness of the composite film is greater than 0.3 mm.

10. The vaporization phase change material component according to claim 1, characterized in that: The mass ratio of vaporization phase change temperature guiding and regulating material: vaporization phase change material is 0.5~2:9.5~8; the mass ratio of vaporization phase change material: vapor absorption material is 1.5~3:8.5~7.

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