CN212205769U - Heat insulation device with phase change material - Google Patents

Abstract

The utility model provides a take phase change material's heat-proof device, it includes: the heat preservation chamber is provided with a first cavity and a second cavity which are matched with each other, and the first cavity and the second cavity are combined to form a heat preservation cavity; the storage chamber is arranged in the heat preservation cavity and is provided with a storage cavity formed by heat insulation materials and a heat insulation plate covering the storage cavity; and the cold storage part is arranged in the storage cavity together with the object to be insulated, and comprises a sealed bag for containing a liquid Phase Change Material (PCM), wherein the shape of the sealed bag is variable, the phase change material is formed by combining solid fatty acid, paraffin, water, xanthan gum, sodium polyacrylate, sodium benzoate, kaolin/zeolite and modified glass microspheres/glass fibers, the mass fraction of the xanthan gum is 0.5-1.5%, the mass fraction of the sodium polyacrylate is 0.5-1.5%, the mass fraction of the sodium benzoate is 0.01-0.3%, the mass fraction of the kaolin/zeolite is 0.1-0.5%, and the mass fraction of the modified glass microspheres/glass fibers is 1-3%.

Description

Heat insulation device with phase change material

The application is a divisional application of patent application with application date of 2018, 12 and 30, application number of 2018222607212 and invented name of a heat insulation device with phase change material.

Technical Field

The utility model relates to a take phase change material's heat-proof device.

Background

In conventional cold chain transportation, the cost of transportation and the effective working time of the cold box are factors of major concern in the cold chain transportation industry. At present, long-distance transportation generally takes days, weeks or even months, and particularly in extreme environments, some goods need to keep constant temperature for a long time in the transportation. Among these, cold chain transportation of foods and pharmaceuticals is particularly important. Therefore, there is a need for an insulation system that maintains temperature during long periods of storage and transportation.

Commercial cold boxes currently used in cold chains are not very desirable. The current practice is to use the electric energy generated by the diesel generator to keep constant temperature, and the energy consumption is large. And the prior heat insulation box has larger volume and is not very convenient to use. In addition, such methods can result in higher transportation costs.

In addition, Phase Change Materials (PCMs) are also currently used to insulate heat by absorbing heat and causing phase changes. However, a disadvantage of current PCMs is that these materials may not typically have a high specific heat capacity and cannot be used for long periods of time in cold chain transportation. Therefore, there is an urgent need for a heat preservation system that can effectively preserve heat during cold chain transportation and prolong the effective heat preservation time to meet the needs during transportation.

SUMMERY OF THE UTILITY MODEL

The present invention has been made in view of the above-mentioned state of the art, and an object of the present invention is to provide a heat insulating device capable of effectively prolonging the heat-insulating time.

Therefore, the utility model provides a take phase change material's heat-proof device, it includes: the heat preservation chamber is provided with a first cavity and a second cavity which are matched with each other, and the first cavity and the second cavity are combined to form a heat preservation cavity; the storage chamber is arranged in the heat insulation cavity and is provided with a storage cavity formed by heat insulation materials and a heat insulation plate covering the storage cavity; and a cold accumulation portion arranged in the storage chamber with an object to be insulated, and including a sealed package containing a Phase Change Material (PCM) in a liquid state, the sealed package being variable in shape, and the sealing bag is filled around the object to be insulated and is in contact with the object to be insulated, wherein the phase-change material is formed by combining solid fatty acid, paraffin, water, xanthan gum, sodium polyacrylate, sodium benzoate, kaolin/zeolite and modified glass microspheres/glass fibers, the mass fraction of the xanthan gum is 0.5 to 1.5 percent, the mass fraction of the sodium polyacrylate is 0.5 to 1.5 percent, the mass fraction of the sodium benzoate is 0.01-0.3%, the mass fraction of the kaolin/zeolite is 0.1-0.5%, and the mass fraction of the modified glass microspheres/glass fibers is 1-3%.

In this case, the heat-insulating chamber prevents the coolant from leaking outside by the cooperation of the first cavity and the second cavity, the storage chamber can minimize the exchange between the internal temperature and the external temperature, and the cold storage portion is filled around the object to be insulated with the sealed package containing the phase change material to keep the temperature in the storage chamber stable, thereby greatly prolonging the heat-insulating time of the heat-insulating device.

In the heat insulating device according to the present invention, the fatty acid may be one selected from the group consisting of capric acid, caprylic acid, caproic acid, lauric acid, elastin acid, palmitic acid, pentaenoic acid, tristearin, myristic acid, palmitic acid, stearic acid, and oleic acid. This reduces the thermal conductivity and maintains the temperature.

In addition, in the heat insulating device according to the present invention, optionally, the first cavity is integrally formed, the second cavity is integrally formed, and the first cavity and the second cavity are assembled together via a fastening mechanism. Therefore, the stability and the sealing performance of the assembled first cavity and the assembled second cavity can be improved.

In addition, in the heat insulating device according to the present invention, the storage chamber may be formed by bonding and combining a plurality of heat insulating plates to each other. Therefore, the sealing performance of the storage cavity can be improved.

Additionally, in the heat insulation apparatus of the present invention, optionally, a sealing gasket is provided between the heat insulation plate and the storage chamber, and the sealing performance of the heat insulation plate and the storage chamber is ensured by the sealing gasket. In this case, the heat-insulating plate and the storage chamber may be sealed without using an adhesive, and thus, flexibility of the heat-insulating plate and the storage chamber can be improved while securing sealability.

In addition, in the heat insulating device of the present invention, optionally, the heat insulating material is selected from one of asbestos, diatomaceous earth, perlite, aerogel felt, glass fiber, styrofoam, polyurethane, and cowfelt, and the heat insulating plate is formed of one of a vacuum heat insulating layer, a polystyrene layer, a micro-nano heat insulating layer, and vacuum glass beads. This reduces the thermal conductivity and maintains the temperature.

Additionally, in the thermal insulation apparatus of the present invention, optionally, the modified glass microspheres/glass fibers are derived from a glass fiber additive comprising a glass fiber mat or a glass fiber fabric. Thereby, the addition of glass fibers to the phase change material can be facilitated.

Further, in the heat insulating device according to the present invention, the sealing bag may be made of at least one of polyethylene, polyester, polycarbonate, polypropylene, or aluminum. From this, can be convenient for sealed package and storing chamber carry out heat exchange.

Additionally, in the heat shield apparatus of the present invention, optionally, the sealed bundle has a three-dimensional support structure composed of one of polyethylene, polyester, polycarbonate, or polypropylene. Therefore, the stability of the sealed package can be improved, and the influence of the three-dimensional support structure on the heat conductivity of the sealed package can be reduced.

In addition, in the heat insulating device of the present invention, optionally, the inner wall and the outer wall of the heat insulating chamber are further covered with a heat insulating aluminum film. This can further reduce the dissipation of heat.

According to the utility model discloses, can provide the heat-proof device of taking phase change material that can work for a long time.

Drawings

Embodiments of the invention will now be explained in further detail by way of example only with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural view showing a heat insulating device according to an embodiment of the present invention.

Fig. 2 is a schematic sectional view showing a heat insulating device according to an embodiment of the present invention.

Fig. 3 is a schematic view showing a structure of a sealed bag of a heat insulating device according to an embodiment of the present invention.

Fig. 4 is a schematic sectional view of a sealed bag showing a heat insulating device according to an embodiment of the present invention.

Fig. 5 is a schematic three-dimensional support structure diagram showing a heat insulating device according to an embodiment of the present invention.

Fig. 6 is a schematic flow chart illustrating a method for manufacturing a phase change material according to an embodiment of the present invention.

The reference numbers illustrate:

1 … heat-insulating device, 10 … heat-insulating chamber, 11 … heat-insulating cavity, 11a … first cavity, 11b … second cavity, 20 … storage chamber, 21 … storage chamber, 22 … heat-insulating plate, 30 … cold-storage part, 31 … sealed package, 32 … three-dimensional supporting structure.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and embodiments. In the drawings, the same components or components having the same functions are denoted by the same reference numerals, and redundant description thereof will be omitted.

Fig. 1 is a schematic configuration diagram showing a heat insulating device 1 according to an embodiment of the present invention. Fig. 2 is a schematic sectional view showing a heat insulating device 1 according to an embodiment of the present invention.

As shown in fig. 1 and 2, the present invention relates to a heat insulating device 1 (also referred to as "heat insulating device 1" in some cases) with a phase change material (not shown). In the present embodiment, the heat insulating device 1 may include a warm keeping chamber 10, a storage chamber 20, and a cold storage portion 30. In the heat insulating apparatus 1 according to the present embodiment, the heat-retaining chamber 10 may have a heat-retaining chamber 11 (see fig. 2) formed by a first cavity 11a and a second cavity 11b that are fitted to each other. The storage compartment 20 may be disposed within the insulation cavity 11 and have a storage cavity 21 formed of an insulation material and an insulation panel 22 covering the storage cavity 21. The cold storage portion 30 may be disposed in the storage chamber 21 and contain a Phase Change Material (PCM).

In this case, the warm keeping chamber 10 prevents the coolant from leaking outside by the cooperation of the first cavity 11a and the second cavity 11b, the storage chamber 20 can minimize the exchange between the internal temperature and the external temperature, and the cold storage part 30 keeps the temperature in the storage chamber 20 stable by the phase change material contained therein, thereby greatly extending the warm keeping time of the heat insulating device 1.

In the present invention, "phase change material" (PCM) may refer to a substance having high heat of fusion, undergoing a phase change at a certain temperature, and capable of storing or releasing a large amount of energy. The phase change may be, but is not limited to, melting and solidifying. The phase change material of the present invention may also be referred to as an organic compound, an inorganic compound, or a mixture thereof.

As described above, the insulated chamber 10 may have the first cavity 11a and the second cavity 11b that are fitted to each other. In some examples, the first cavity 11a may be integrally formed, and the second cavity 11b may also be integrally formed. This can improve the sealing property between the first cavity 11a and the second cavity 11 b.

In some examples, the first cavity 11a may have a protrusion or a groove (not shown) that mates with the second cavity 11 b. In other examples, the second cavity 11b may also have a protrusion or a groove (not shown) that mates with the first cavity 11 a. Thereby, the first cavity 11a and the second cavity 11b can be tightly fitted. In addition, in some examples, the first cavity 11a and the second cavity 11b may be assembled together via a snap-fit mechanism.

In some examples, the exterior of the heat-preserving chamber 10 may also be covered with an insulating aluminum film (not shown). This can further reduce the heat loss of the heat retaining chamber 10.

In other examples, the insulating aluminum film may also be wrapped around both the interior (inner wall) and exterior (outer wall) of the insulated chamber 10. This can further reduce heat exchange between the inside and outside of the heat retention chamber 10.

In some examples, the insulated chamber 10 may also be made of insulating foam. In other examples, the insulating foam may be a polyurethane foam. Specifically, the polyurethane foam is a novel synthetic material with heat preservation and waterproof functions, has low heat conductivity coefficient, typically 0.022-0.033W/(m.K), is the lowest heat conductivity coefficient of all the heat preservation materials at present, and has low manufacturing cost. In this case, the use of the insulating foam can effectively extend the insulating time and reduce the manufacturing cost of the insulating chamber 10.

In some examples, the insulating chamber 10 may be rectangular, as shown in fig. 1 and 2. In other examples, the holding chamber 10 may be prismatic, cylindrical, conical, etc. Thus, the object can be conveniently accommodated and stably placed. In addition, in some examples, the insulated chamber 10 may also be amorphous.

As shown in fig. 2, the storage compartment 20 may be disposed in the insulation cavity 11, and have a storage cavity 21 formed of an insulation material and an insulation plate 22 covering the storage cavity 21.

In some examples, the thermal insulation material constituting the storage chamber 21 may be selected from at least one of asbestos, diatomaceous earth, perlite, aerogel blanket, glass fiber, styrofoam, polyurethane, and cowfelt. However, the present invention is not limited thereto, and the heat insulating material may be foam concrete, calcium silicate, or the like. In this case, the best thermal insulation can be achieved by a combination of different materials.

In some examples, the insulation panel 22 may be formed of at least one of a vacuum insulation layer, a polystyrene layer, a micro-nano insulation layer, and vacuum glass beads. In other examples, the insulation sheeting 22 may also be composed of a combination of layers of materials. This can reduce the thermal conductivity of the storage compartment 20, and can extend the warm-keeping time of the heat insulating device 1.

In other examples, the storage chamber 21 may be formed by bonding and combining a plurality of (e.g., 5) heat-insulating plates 22 to each other. Therefore, the heat preservation performance of the storage cavity 21 can be improved while the sealing performance of the storage cavity 21 is improved. In some examples, the 5 insulation panels 22 constituting the storage chamber 21 may be bonded to each other by an adhesive such as silicone glue. This can improve the sealing property between the heat insulating plates 22 and prolong the heat retention time of the heat insulating device 1.

In some examples, a gasket (not shown) may be further disposed between the heat insulation plate 22 and the storage cavity 21. In this case, the heat insulating plate 22 and the storage chamber 21 can be sealed with a gasket, and thus, flexibility in arrangement of the heat insulating plate 22 and the storage chamber 21 can be improved while ensuring sealability.

In some examples, the gasket may be made of silicone. Specifically, the silica gel may be one or more of silicone rubber, silicone resin, silicone oil, a silane coupling agent, or inorganic silica gel.

In other examples, the gasket may also be made of a rubber material. This improves the sealing performance of the gasket.

Fig. 3 is a schematic structural view showing the sealed bundle 31 of the heat insulating device 1 according to the embodiment of the present invention. Fig. 4 is a schematic sectional view showing a structure of a sealed bundle 31 of the heat insulating device 1 according to the embodiment of the present invention. Fig. 5 is a schematic view showing the three-dimensional support structure 32 of the heat insulating device 1 according to the embodiment of the present invention.

In the present embodiment, the cold storage part 30 may include at least one sealed pack 31 for containing the phase change material (see fig. 3 and 4). Specifically, different quantities of the sealed packages 31 can be used to provide different cold storage capacities according to the materials to be insulated. In some examples, the phase change material contained in the sealed bundle 31 is preferably in a liquid state. In this case, the phase change material can completely fill the space inside the sealed package 31, avoiding the occurrence of voids, thereby improving the cold storage effect. And the shape of the sealed package 31 filled with the liquid phase-change material can be flexibly changed, thereby better filling the periphery of the object to be insulated and providing better cold storage capacity. Additionally, in other examples, the phase change material may also be in a solid state. In this case, the heat retention time can be extended as well.

In some examples, the sealed bundle 31 may be composed of at least one of polyethylene, polyester, polycarbonate, polypropylene, or aluminum. This facilitates heat exchange between the seal pack 31 and the storage chamber 21.

As shown in fig. 5, in some examples, the sealed bundle 31 may have a three-dimensional support structure 32. This can improve the stability of the sealed package 31. In some examples, the three-dimensional support structure 32 may be a rigid frame.

In some examples, the three-dimensional support structure 32 may form a particular geometric shape. In some examples, the geometric shape may be selected from a cuboid, prism, cylinder, or other irregular shape. In this case, the sealed bundle 31 can be supported using the three-dimensional support structure 32 of a different shape according to circumstances.

In addition, the sealed bundle 31 having a specific geometry formed by the three-dimensional support structure 32 can be in close contact with the insulation sheeting 22. In this case, it is advantageous to increase the contact area between the sealed bundle 31 and the heat insulating plate 22 and reduce the gap therebetween, thereby reducing the overall thermal conductivity and improving the heat insulating effect of the heat insulating device 1.

In some examples, the three-dimensional support structure 32 may be composed of a polymer. Specifically, the three-dimensional support structure 32 is composed of one or more materials of polyethylene, polyester, polycarbonate, or polypropylene. Thereby, the influence of the material of the three-dimensional support structure 32 on the thermal conductivity of the sealed bundle 31 can be reduced.

In the present embodiment, the heat insulating device 1 is assembled by the following steps. First, the cold storage part 30 is placed in the storage chamber 20, then, the articles to be stored are placed in the storage chamber 20, finally, the storage chamber 20 is placed in the second cavity 11b of the heat storage chamber 10, and the first cavity 11a is combined with the second cavity 11 b.

In this embodiment, the phase change material may be selected from a combination of at least one of fatty acid, paraffin, water and at least one of xanthan gum, sodium polyacrylate, sodium benzoate, kaolin/zeolite, modified glass microspheres/glass fibers. In some examples, the fatty acid may be selected from capric acid, caprylic acid, caproic acid, lauric acid, elastic acid, palmitic acid, pentaenoic acid, tristearin, myristic acid, palmitic acid, stearic acid, and oleic acid.

In some examples, the mass fraction of xanthan gum in the phase change material may be about 0.5% to 1.5%, preferably 1% to 1.2%. In this case, the phase-change material can be adjusted in colloidal form and phase-change temperature by adding a proper amount of xanthan gum.

In some examples, the mass fraction of sodium polyacrylate in the phase change material may be about 0.5% to 1.5%, preferably 1% to 1.2%. In this case, the phase change material can adjust the colloid form and the phase change temperature of the material by adding a proper amount of sodium polyacrylate, thereby improving the cold storage capacity of the material.

In some examples, the mass fraction of sodium benzoate in the phase change material may be about 0.01% to 0.3%, preferably 0.1% to 0.2%. Therefore, the antibacterial and bactericidal effects can be achieved.

In some examples, the kaolin/zeolite mass fraction may be about 0.1% to 0.5%, preferably 0.2% to 0.4% in the phase change material. This reduces the possibility of supercooling of the material.

In some examples, the mass fraction of modified glass microspheres/glass fibers in the phase change material may be about 1% to 3%, preferably 1.5% to 2.5%. In this case, the modified glass microspheres/glass fibers are uniformly mixed into the material and pass through the bottom thermal conductivity of the material, thereby reducing the overall thermal conductivity of the phase change material.

The method for producing the phase change material according to the present embodiment will be described in detail below with reference to fig. 6. Fig. 6 is a schematic flow chart illustrating a method for manufacturing a phase change material according to an embodiment of the present invention.

As shown in fig. 6, the method of manufacturing the phase change material may include providing fatty acid, paraffin, water, or a mixture thereof (hereinafter, referred to as "solid raw material") in a solid state (step S110). Next, at least one additive is added to the solid raw material (step S120). Then, the solid raw material is changed into a liquid state to form a liquid mixture containing the solid raw material and the additive (step S130). Finally, the obtained liquid mixture is stirred to form the phase change material (step S140).

In some examples, in step S120, the additive is selected from at least one of xanthan gum, sodium polyacrylate, sodium benzoate, kaolin/zeolite, modified glass microspheres/glass fibers. In other examples, ice may also be added to the solid feedstock in step S120. This can effectively improve the heat insulation efficiency.

In addition, in some examples, in step S120, as an additive, a material such as a glass fiber mat or a glass fiber fabric may be added. Additionally, in some examples, air in the glass fibers may also be expelled by heating. In some examples, a step of reducing the size of the additive of the glass fiber may also be added before step S120. Specifically, the size of the additive may be reduced by, for example, blending, cutting, shredding, grinding, shearing, grinding, or tearing.

While the present invention has been described in detail in connection with the drawings and the examples, it is to be understood that the above description is not intended to limit the present invention in any way. The present invention may be modified and varied as necessary by those skilled in the art without departing from the true spirit and scope of the invention, and all such modifications and variations are intended to be included within the scope of the invention.

Claims (8)

1. A heat insulation device with phase change material is characterized in that,

the method comprises the following steps:

the heat preservation chamber is provided with a first cavity and a second cavity which are matched with each other, and the first cavity and the second cavity are combined to form a heat preservation cavity;

the storage chamber is arranged in the heat insulation cavity and is provided with a storage cavity formed by heat insulation materials and a heat insulation plate covering the storage cavity; and

the cold accumulation part is arranged in the storage cavity together with the object to be insulated, the cold accumulation part comprises a sealed bag containing a liquid Phase Change Material (PCM), the shape of the sealed bag is variable, and the sealed bag is filled around the object to be insulated so as to provide better cold accumulation capacity.

2. The thermal insulation apparatus of claim 1,

the first cavity is integrally formed, the second cavity is integrally formed, and the first cavity and the second cavity are assembled together through a clamping mechanism.

3. The thermal insulation apparatus of claim 1,

the storage cavity is formed by bonding and combining a plurality of heat insulation plates with each other.

4. Heat-insulating device according to claim 1 or 3,

the heat insulation plate is provided with a storage cavity, and a sealing gasket is arranged between the heat insulation plate and the storage cavity and ensures the sealing property of the heat insulation plate and the storage cavity through the sealing gasket.

5. The thermal insulation apparatus of claim 1,

the heat insulating material is selected from one of asbestos, diatomite, perlite, aerogel felt, glass fiber, polystyrene foam plastic, polyurethane and felt,

the heat insulation plate is composed of one of a vacuum heat insulation layer, a polyphenyl layer, a micro-nano heat insulation layer and vacuum glass beads.

6. The thermal insulation apparatus of claim 1,

the sealed bag is made of one of polyethylene, polyester, polycarbonate, polypropylene or aluminum, so that the sealed bag and the storage cavity are subjected to heat exchange.

7. The thermal insulation apparatus of claim 1,

the sealed bundle has a three-dimensional support structure composed of one of polyethylene, polyester, polycarbonate, or polypropylene.

8. The thermal insulation apparatus of claim 1,

the inner wall and the outer wall of the heat preservation chamber are also coated with heat insulation aluminum films.

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