Multilayer heat insulating structure, energy-saving heating jacket, and coating and manufacturing method therefor

Abstract

To provide a multilayer heat insulating structure, an energy-saving heating jacket, and a coating and a manufacturing method therefor.SOLUTION: The present invention discloses a multilayer heat insulating structure, an energy-saving heating jacket and a coating and a manufacturing method therefor. Between a back layer heat-resistant cloth and an outer layer heat-resistant cloth of the energy-saving heating jacket, an electric heater is provided, and the multilayer heat insulating structure is filled. The multilayer heat insulating structure has a plurality of porous heat insulating layers. Some or all of the porous heat insulating layers selectively cover or do not cover a porous heat insulating film. The multilayer heat insulating structure of the present invention makes it possible for the energy-saving heating jacket to have an energy-saving efficiency of more than 25%, and to prevent problems such as dust pollution due to high-temperature decomposition and the risk of PM2.5.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a heating jacket and its heat insulation structure, and particularly to an energy-saving heating jacket, a multi-layer heat insulation structure, its coating, and a manufacturing method thereof.

Background Art

[0002] In many manufacturing processes and steps such as semiconductor manufacturing and food processing, operations in a high-temperature environment or maintaining a certain temperature are required. Taking the high-temperature semiconductor process as an example, the temperature of the process exhaust gas discharged from the semiconductor process chamber becomes very high. In order to prevent the high-temperature process exhaust gas from being pumped out by the exhaust pump and discharged outside the semiconductor process chamber, the exhaust gas is rapidly cooled and condensed due to an excessive temperature difference, causing deposition and accumulation. Gas release occurs due to process waste gas and solid particles contained therein, and its rate decreases or is blocked. Traditionally, electric heating elements have been used to heat these exhaust pipes to the required temperature. However, in the conventional heating method, a large amount of energy is required to maintain these exhaust pipes at the above temperature, consuming a very large amount of energy and not being environmentally friendly. In recent years, attempts have also been made to use heat insulation materials to slow down the cooling rate of this drain pipe, but general heat insulation materials are prone to cracking when used at high temperatures for a long time, causing dust and PM2.5 pollution.

Summary of the Invention

Problems to be Solved by the Invention

[0003] The main object of the present invention is to provide a multi-layer heat insulation structure, an energy-saving heating jacket, its coating, and a manufacturing method that can solve the problems caused by the prior art.

Means for Solving the Problems

[0004] The multilayer heat insulation structure according to the present invention is composed of a plurality of porous heat insulation layers stacked in a staggered or sequential manner. These adjacent porous heat insulation layers are selected from the group consisting of a glass fiber wool layer, a foam layer, and a group consisting of a glass fiber wool layer and a foam layer. The gap formed during stacking is used as a heat insulation space. The foam layer is selected from the group consisting of an organic foam layer, an inorganic foam layer, and an organic-inorganic composite foam layer. A porous heat insulation film covers the surface of the porous structure of a part of the plurality of porous heat insulation layers, and the fine pores of the porous structure of a part of the plurality of porous heat insulation layers are not fully filled. As a result, a part of the plurality of porous heat insulation layers remains porous. The multilayer heat insulation structure is used for storing thermal energy. When the multilayer heat insulation structure has a certain total thickness, its energy-saving efficiency is higher than the energy-saving efficiency that can be achieved by a glass fiber wool layer with the same actual total thickness and being a single layer.

[0005] In the multilayer heat insulation structure according to the present invention, among the plurality of the porous heat insulation layers, only a part of the porous heat insulation layers are covered by the porous heat insulation film, and a part of the porous heat insulation layers remain porous. As a result, when the multilayer heat insulation structure has the total thickness, the energy-saving efficiency that can be achieved is higher than the energy-saving efficiency that can be achieved when the glass fiber wool layer, which is a single layer, has the same actual total thickness.

[0006] In the multilayer heat insulation structure according to the present invention, the porous heat insulation film covers the surface of the porous structure of the remaining porous heat insulation layers, and the fine pores of the porous structure of the remaining porous heat insulation layers are not fully filled. As a result, the remaining porous heat insulation layers remain porous.

[0007] In the multilayer heat insulation structure according to the present invention, the weight ratio of a part of the porous heat insulation layers and the porous heat insulation film contained therein is 1:0.2 to 1:0.7.

[0008] In the multilayer heat insulation structure according to the present invention, when the porous heat insulation layer is a glass fiber wool layer with 7 layers and a thickness of 3 mm, the energy-saving efficiency of the multilayer heat insulation structure is in the range of 13.2% to 25.3%.

[0009] In the multilayer heat insulation structure according to the present invention, when the porous heat insulation layer is a glass fiber wool layer with a thickness of 10 mm in one layer and a polyurethane layer with a thickness of 20 mm in one layer, and the porous heat insulation film covers the surface on one side of the polyurethane layer, the energy-saving efficiency of the multilayer heat insulation structure is 23.4%.

[0010] In the multilayer heat insulation structure according to the present invention, the porous heat insulation film conformally coats the surface of the porous structure of the remaining porous heat insulation layer and does not sufficiently fill the fine pores of the porous structure of the remaining porous heat insulation layer, whereby the remaining porous heat insulation layer remains porous.

[0011] In the multilayer heat insulation structure according to the present invention, the porous heat insulation film conformally coats the surface of the porous structure of the part of the porous heat insulation layer and does not sufficiently fill the fine pores of the porous structure of the part of the porous heat insulation layer, whereby the part of the porous heat insulation layer remains porous.

[0012] In the multilayer heat insulation structure according to the present invention, the weight ratio of the remaining porous heat insulation layer to the porous heat insulation film contained therein is 1:0.2 to 1:0.7.

[0013] In the multilayer heat insulation structure according to the present invention, if the porous heat insulation layer is a glass fiber wool layer with 7 layers and a thickness of 3 mm, the energy-saving efficiency of the multilayer heat insulation structure is 23%.

[0014] The multi-layer heat insulation structure according to the present invention is characterized in that the material of the organic foam layer is selected from the group consisting of polyurethane, polystyrene, polypropylene, polyethylene, and a cluster of polystyrene and polyethylene; the material of the inorganic foam layer is selected from the group consisting of glass-based microbeads, expanded perlite, closed perlite, and rock wool; and / or the material of the organic-inorganic composite foam layer is a composite material composed of the material of the organic foam layer and the material of the inorganic foam layer.

[0015] The multi-layer heat insulation structure according to the present invention is characterized in that the porous heat insulation film employs an inorganic substance, a siloxane oligomer (Alkoxylsiloxane Oligomer), a siloxane compound (Alkoxylsiloxane compound), a modified polymer, and a solvent, and the inorganic substance is selected from the group consisting of carbon black, fullerene, graphene, glass fiber, clay, and ceramics.

[0016] The multi-layer heat insulation structure according to the present invention is characterized in that the thickness of each porous heat insulation layer ranges from 3 mm to 6 mm, and the total number of layers of the porous heat insulation layer is from 3 to 8 layers.

[0017] The energy-saving heating jacket according to the present invention is for heating and heat-insulating an object, and includes a back-layer heat-resistant cloth for contacting the object, an outer-layer heat-resistant cloth, and a heating element and the multi-layer heat insulation structure according to any one of claims 1 to 11 provided between the back-layer heat-resistant cloth and the outer-layer heat-resistant cloth. The heating element is for providing thermal energy, and the multi-layer heat insulation structure is for accumulating the thermal energy, and the effect of energy saving by heat insulation can be obtained. The energy-saving efficiency of the multi-layer heat insulation structure ranges from 13.2% to 25.3%.

[0018] The energy-saving heating jacket according to the present invention is characterized in that the object is a pipe joint, a scrubber, an extraction pump, or a valve.

[0019] The energy-saving heating jacket according to the present invention is characterized in that the outer shape of the energy-saving heating jacket is the same as or different from that of the object, and the outer shape of the energy-saving heating jacket is planar or three-dimensional.

[0020] The energy-saving heating jacket according to the present invention is characterized in that a heat-insulating space is formed between the multi-layer heat-insulating structure and the heating element.

[0021] The object covered by the energy-saving heating jacket according to the present invention is characterized in that it is a pipe joint, a scrubber, an extraction pump or a valve.

[0022] The manufacturing method of the energy-saving heating jacket according to the present invention is for heating and heat-insulating an object, and includes a back-layer heat-resistant cloth for contacting the object, an outer-layer heat-resistant cloth, a heating element provided between the back-layer heat-resistant cloth and the outer-layer heat-resistant cloth, and the above multi-layer heat-insulating structure. The heating element is for providing thermal energy, the multi-layer heat-insulating structure is for accumulating thermal energy, and the effect of energy saving by heat insulation can be obtained. The energy-saving efficiency of the multi-layer heat-insulating structure is in the range of 13.2% to 25.3%.

Effect of the Invention

[0023] According to the multi-layer heat-insulating structure, the energy-saving heating jacket, its covering, and the manufacturing method according to the present invention, the following effects are obtained. (1) The multi-layer heat-insulating structure is composed of a plurality of porous heat-insulating layers stacked in a staggered or sequential manner. These porous heat-insulating layers are a glass fiber wool layer, a polyurethane (PU) layer, or a glass fiber wool layer and a polyurethane layer. The glass fiber wool layer is a porous structure formed by arranging a plurality of cotton fibers in a staggered manner, and the polyurethane layer is a porous structure formed by a polyurethane foam. (2) Some or all of the porous heat-insulating layers are selectively covered with a porous heat-insulating film. (3) The material of the porous heat insulation film has good adhesion to the porous heat insulation layer (for example, the cotton fibers of the porous glass fiber wool layer). (4) The porous heat insulation film may form a porous structure on the porous heat insulation layer (for example, the glass fiber wool layer). Thereby, the energy saving efficiency is higher than 25%, which is energy-saving and environmentally friendly. (5) The multilayer heat insulation structure has good heat resistance, and problems such as dust pollution and the risk caused by PM 2.5 can be avoided due to the high-temperature decomposition of the multilayer heat insulation structure. (6) The energy-saving heating jacket can be applied to various types of vacuum parts.

[0024] To deepen the understanding of the technical features and achievable technical effects of the present invention, better embodiments and detailed descriptions are shown below.

Brief Description of the Drawings

[0025]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0026] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The ratios of the respective members in the drawings of the embodiments of the present invention are shown for ease of understanding of the description and are not actual ratios. Also, the ratio of the dimensions of the assembly shown in the figures is for explaining each component and its structure, and of course, the present invention is not limited thereto. On the other hand, for convenience of understanding, the same components in the following embodiments will be described with the same reference numerals.

[0027] Furthermore, the terms used throughout the specification and the claims have their ordinary meanings in this field, the content disclosed in this specification, and the special content, unless otherwise specified. Some of the terms used to describe the present invention are explained below or elsewhere in this specification to provide additional guidance to those skilled in the art regarding the description of the present invention.

[0028] Regarding the use of "first", "second", "third", etc. in this article, they do not specifically indicate order or sequence and are not used to limit the present invention. This is only used to distinguish components or operations described with the same technical term.

[0029] Next, when terms such as "including", "comprising", "having", "containing", etc. are used in this article, they are all open terms. That is, they mean including but not limited to this.

[0030] The multilayer heat insulation structure, energy-saving heating jacket and its covering and manufacturing method according to the present invention can be applied to various applications that require maintaining temperature, for example, it can be applied to semiconductor processes, food processing, etc. that require heating or heat insulation. Furthermore, in the delivery and transportation of oil and food, it may be necessary to maintain the temperature of the delivery pipes and transportation containers at a specific temperature. Therefore, the present invention can also be applied to, for example, oil and food delivery pipes, transportation containers, etc. Taking the semiconductor process as an example, when high-temperature process exhaust gas is extracted by an extraction pump and discharged outside the semiconductor process chamber, the temperature difference is too large, resulting in rapid cooling and condensation, and the process exhaust gas and the solid particles contained therein deposit and accumulate. As a result, in order to avoid a decrease in pumping speed and blockage, the energy-saving heating jacket according to the present invention is for covering and heating all objects that can be contacted (for example, as shown in FIG. 8, extraction pumps, scrubbers, pipe joints, valves, etc.) during the process of discharging and treating the process exhaust gas. Thereby, the high-temperature state is maintained in a more energy-saving state. Although the present invention has been described by taking the semiconductor process as an example, it is not limited thereto. The multilayer heat insulation structure, energy-saving heating jacket and its covering and manufacturing method according to the present invention can be applied to each application that requires maintaining temperature. Thereby, the outer shape of the energy-saving heating jacket according to the present invention may be the same as or different from the contour of the object to be covered, and may be planar (for example, sheet-like) or three-dimensional (for example, jacket-like, bag-like, etc.). Also, the outer shape of the multilayer heat insulation structure 10 of the energy-saving heating jacket according to the present invention may be the same as or different from the object covered by the energy-saving heating jacket, and the multilayer heat insulation structure 10 is planar (for example, sheet-like) or three-dimensional (for example, jacket-like, bag-like, etc.).

[0031] Refer to FIG. 1. The energy-saving heating jacket 100 according to the present invention includes an inner-layer heat-resistant cloth 110, an outer-layer heat-resistant cloth 120, a heating element 130, and a multilayer heat-insulating structure 10. The inner-layer heat-resistant cloth 110 is for contacting the object 200 waiting for heating. The outer shape of the energy-saving heating jacket 100 and its multilayer heat-insulating structure 10 is not particularly limited, and any shape is acceptable. It may have a shape corresponding to the outer shape of the object 200 waiting for heating, so that the object 200 can be surrounded. Or it may be in a sheet shape, so that it can be wound around the above-mentioned object 200. Similarly, the dimensions of the energy-saving heating jacket 100 and its multilayer heat-insulating structure 10 are not limited in any way and may be determined according to the dimensions of the object 200 waiting for heating. Taking as an example that the outer shape of the energy-saving heating jacket 100 and / or the multilayer heat-insulating structure 10 is the same as the outer shape of the object 200, the dimensions of the energy-saving heating jacket 100 and the multilayer heat-insulating structure 10 are preferably slightly larger than the dimensions of the object 200. Thereby, the energy-saving heating jacket 100 can closely cover the object 200 waiting for heating.

[0032] The heating element 130 and the multilayer heat-insulating structure 10 are provided in a storage bag composed of the inner-layer heat-resistant cloth 110 and the outer-layer heat-resistant cloth 120, and preferably, the heating element 130 is located between the inner-layer heat-resistant cloth 110 and the multilayer heat-insulating structure 10. The heating element 130 is, for example, an electric resistance wire. For example, by supplying thermal energy via a power cord electrically connected to commercial power to heat the object 200, the temperature difference between the process exhaust gas and the object 200 can be reduced. The multi-layer heat insulation structure 10 is for accumulating the thermal energy from the heating element 130 and can avoid the divergence of the thermal energy. Thereby, the electric power supplied to the heating body 130 can be reduced, and it is not necessary to increase the necessary energy consumption for maintaining the object 200 at the set temperature, so that the heat insulation effect for energy saving can be obtained. The above range of the set temperature is, for example, about 100 degrees Celsius to 180 degrees Celsius, but is not limited thereto. In the present invention, the inner layer heat-resistant cloth 110, the outer layer heat-resistant cloth 120, and the heating element 130 may adopt a conventional structure, and for example, commercially available ones may be adopted.

[0033] To facilitate the test of the energy-saving efficiency of various heat insulation structures, a filling port may be formed in the storage bag composed of the inner layer heat-resistant cloth 110 and the outer layer heat-resistant cloth 120. Thereby, the heat insulation structure to be tested can be put in. A sealing element such as a zipper or a fastener is selectively equipped at this filling port to obtain the effect of closing the storage bag. Compared with using a conventional single-layer heat insulation layer heating jacket, the energy-saving heating jacket 100 according to the present invention can achieve an energy-saving efficiency of about 13.2% to 25.3% due to the multi-layer heat insulation structure 10. As shown in FIG. 2, taking the energy-saving heating jacket 100 in the form of a sheet as an example, the energy-saving heating jacket 100 according to the present invention is for covering and heating the object 200, and corresponding connectors 125 (for example, magic tape or fasteners) may be additionally provided at both ends of the outer layer heat-resistant cloth 120. Taking the energy-saving heating jacket 100 in the form of a sheet as an example, when the energy-saving heating jacket 100 is to cover the object 200 waiting for heating, first, the inner layer heat-resistant cloth 110 is brought into contact with the object 200 waiting for heating, and the energy-saving heating jacket 100 is wound around the object 200 waiting for heating or surrounds the object 200 waiting for heating.

[0034] In the present invention, the calculation formula for the energy-saving efficiency is as follows: subtract the energy consumption required to maintain the object at the set temperature after the second heating jacket covers the object from the energy consumption required to maintain the object at the set temperature after the first heating jacket covers the object, and then divide the result by the energy consumption required to maintain the object at the set temperature after the first heating jacket covers the object, and multiply by "100%". The conditions for the energy-saving efficiency test are 25.7 degrees Celsius, 59% humidity, and 24 hours, and the above set temperature is 180 degrees Celsius. The first heating jacket is a control group, for example, a conventional heating jacket filled with a single layer of porous glass fiber wool. The second heating jacket is a test waiting group, for example, an energy-saving heating jacket according to the present invention filled with a multi-layer heat insulation structure 10. To facilitate the understanding of the effects of the present invention, when the multi-layer porous heat insulation layer of the second heating jacket adopts glass fiber wool, the glass fiber wool is exactly the same as the glass fiber wool of the single-layer heat insulation layer of the first heating jacket, that is, the total thickness, chemical composition and physical properties of both are the same.

[0035] Next, the multilayer heat insulation structure 10 according to the present invention is configured by stacking a plurality of porous heat insulation layers in a staggered or sequential manner. The porous heat insulation layer is selected from the group consisting of a glass fiber wool layer, a foam layer, and a group consisting of a glass fiber wool layer and a foam layer. The foam layer is selected from the group consisting of an organic foam layer, an inorganic foam layer, and an organic-inorganic composite foam layer. The material of the organic foam layer is selected from the group consisting of polyurethane, polystyrene, polypropylene, polyethylene, and a copolymer of polystyrene and polyethylene. The material of the inorganic foam layer is selected from the group consisting of glass-based microbeads, expanded perlite, closed perlite, and rock wool, and / or the material of the organic-inorganic composite foam layer is a composite material composed of the material of the organic foam layer and the material of the inorganic foam layer. Similarly, the foam layer according to the present invention is not limited thereto, and any foam having a porous structure can be applied to the porous heat insulation layer according to the present invention. In the present invention, the case where the foam layer is a polyurethane (PU) layer is described as an example. In other words, all of the porous heat insulation layers may be glass fiber wool layers, all may be polyurethane layers, or all may be a combination of glass fiber wool layers and polyurethane layers. The glass fiber wool layer has a porous structure formed by intertwining a plurality of cotton fibers, and the polyurethane layer has a porous structure formed by a polyurethane foam.

[0036] The multilayer heat insulation structure 10 according to the present invention has various embodiments. That is, in the first embodiment, each porous heat insulation layer is not covered with the porous heat insulation film 50. In the second embodiment, only some of the porous heat insulation layers are covered with the porous heat insulation film 50, and the rest are not covered with the porous heat insulation film 50. In the third embodiment, each porous heat insulation layer is covered with the porous heat insulation film 50. As shown in FIG. 7, a conventional heating jacket uses a single-layer heat insulation layer, while the energy-saving heating jacket 100 according to the first to third embodiments of the present invention uses a multi-layer heat insulation structure 10 having a plurality of porous heat insulation layers, and can achieve an energy-saving efficiency of about 13.2% to 25.3%. In the present invention, by providing a plurality of heat insulation surfaces inside the multi-layer heat insulation structure 10, that is, by using the surfaces of each layer of the stacked porous heat insulation layers 20 as heat insulation surfaces, the possibility of continuous conduction of thermal energy to adjacent porous heat insulation layers 20 can be reduced. As a result, the stacking gap between the stacked and adjacent porous heat insulation layers 20 becomes a heat insulation space capable of obtaining an auxiliary heat insulation effect. In the stacking gap between adjacent porous heat insulation layers 20, a single layer or a plurality of heat insulation layers may be selectively added, thereby improving the auxiliary heat insulation effect. The heat insulation layer employs a material with an extremely low thermal conductivity, such as air, aerogel, polystyrene foam, polystyrene, or other heat insulating materials. According to the present invention, since the energy-saving efficiency described below can be achieved only by the heat insulation space formed by the gap formed by stacking between adjacent porous heat insulation layers 20, the heat insulation layer may be omitted in the present invention. Therefore, according to the multi-layer heat insulation structure 10 of the present invention, the outward dissipation of thermal energy can be reliably and effectively reduced. Since the porous heat insulation layer 20 according to the present invention is stacked on the heating element 130, a stacking gap is formed between the porous heat insulation layer 20 and the heating element 130, which can provide an auxiliary heat insulation effect to form a heat insulation space and effectively achieve the heat insulation effect. Similarly, the present invention increases the heat insulation space between the porous heat insulation layer 20 and the heating element 130 by adjusting, for example, the winding method of the heating element 130 (heating resistance wire) or forming grooves corresponding to the heating resistance wire in the porous heat insulation layer 20.

[0037] In order to simplify the display of the drawings and clearly show the energy-saving effect according to the present invention, in the present invention, although it is exemplified that all of the porous heat-insulating layers of the multilayer heat-insulating structure 10 are glass fiber wool layers, it is not limited thereto. For example, the porous heat-insulating layer according to the present invention employs commercially available porous glass fiber wool to form a glass fiber wool layer, the thickness range is about 3 mm to 6 mm, the total number of layers range is 3 to 8 layers, and its chemical components are, for example, SiO 2 (52 - 55 wt%), Al 2 O 3 (12 - 16 wt%), CaO (15 - 25 wt%), B 2 O 3 (4 - 9 wt%), MgO (0 - 6 wt%), Na 2 O / K 2 O (0 - 1 wt%) and Fe 2 O 3 (0.05 - 0.4 wt%). The physical properties are that the diameter is 9 μm, the length of the cotton fiber is greater than 50 mm, the thermal conductivity is about 0.055 W / m·K, the porosity is about 83% - 93%, and the density range is about 0.102 g / cm 3 ~ 0.2 g / cm 3 . However, the components, content rates, and specifications of the above-mentioned porous glass fiber wool are merely illustrative and not intended to limit the present invention. The present invention can similarly be applied to the components, content rates, and specifications of various porous glass fiber wools. For example, depending on actual needs, the porous glass fiber wool applied to the present invention may be larger than 6 mm, for example, 10 mm or 20 mm, etc.

[0038] Referring to FIG. 3, it will be described in detail. FIG. 3 is a schematic diagram showing the structure of the first embodiment of the multilayer heat-insulating structure according to the present invention. In the first embodiment, the multilayer heat-insulating structure 10 according to the present invention is formed by stacking a plurality of porous heat-insulating layers 20 in a staggered or sequential manner, and the porous heat-insulating layer 20 is selected from the group consisting of a glass fiber wool layer, a polyurethane layer, and a layer composed of a glass fiber wool layer and a polyurethane layer. When the multilayer heat insulation structure 10 according to the present invention has a certain total thickness, the energy-saving efficiency achievable is higher than the energy-saving efficiency achievable when the single-layer glass fiber wool layer is actually the same as the total thickness. Compared with a single-layer glass fiber wool layer (that is, filling the first heating jacket with a glass fiber wool layer having approximately the same total thickness as a control group), in the first embodiment, the porous glass fiber wool layer filled in the second heating jacket and used as a test waiting group has a total of 7 layers, and when the thickness of each layer is 3 mm, its energy-saving efficiency can reach about 13.2%. Thus, according to the present invention, replacing a single-layer glass fiber wool layer having substantially the same total thickness with only 7 layers of porous glass fiber wool does not require any other special processing, and the energy-saving efficiency can reach about 13.2%. This clearly has excellent qualitative characteristics and a great advancement.

[0039] Refer to FIG. 4. FIG. 4 is a schematic diagram showing the structure of a second embodiment of the multilayer heat insulation structure according to the present invention. In the second embodiment, the multilayer heat insulation structure 10 according to the present invention is formed by stacking a plurality of porous heat insulation layers 20 in a staggered or sequential manner, and the porous heat insulation layer 20 is selected from the group consisting of a glass fiber wool layer, a polyurethane layer, and a layer composed of a glass fiber wool layer and a polyurethane layer. In the second embodiment, only a part of the porous heat insulation layer 20 is covered with a porous heat insulation film 50, and the rest is not covered with the porous heat insulation film 50. Taking the case where all the porous heat insulation layers 20 are glass fiber wool layers as an example, only a part of the glass fiber wool layers is covered with the porous heat insulation film 50. Thus, the part of the glass fiber wool layer covered with the porous heat insulation film 50 is still porous, and the remaining glass fiber wool layers are not covered with the porous heat insulation film. When the multi-layer heat insulation structure 10 according to the present invention has a certain total thickness, the energy-saving efficiency achievable is higher than the energy-saving efficiency achievable when the single-layer glass fiber wool layer is actually the same as the total thickness. Compared with a single-layer glass fiber wool layer (that is, filling the first heating jacket with a glass fiber wool layer having approximately the same total thickness as a control group), in the second embodiment, the multi-layer heat insulation structure 10 filled in the second heating jacket and used as a test standby group has a total of 7 layers, and each layer is made of glass fiber wool with a thickness of 3 mm (4 layers of glass fiber wool layers are covered with a porous heat insulation film, and 3 layers of glass fiber wool layers are not covered with a porous heat insulation film). In this case, the energy-saving efficiency can reach about 13.2% - 25.3%. Compared with the first embodiment, in the second embodiment, in addition to taking the surface of each porous heat insulation layer 20 as a heat insulation surface, a porous heat insulation film 50 is further added to some of the porous heat insulation layers 20, so that the heat conduction can be further reduced. Thus, compared with a single-layer glass fiber wool layer having the same total thickness, according to the multi-layer heat insulation structure 10 of the present invention, the divergence of thermal energy to the outside can be surely and effectively reduced.

[0040] Next, in the multi-layer heat insulation structure 10 according to the second embodiment of the present invention, there are various stacking modes for the porous heat insulation layer 20 covered with the porous heat insulation film 50 and the porous heat insulation layer 20 not covered with the porous heat insulation film. For example, there is a staggered stacking, that is, as shown in FIG. 4(A), from bottom to top, for example, each is a porous heat insulation layer 20 covered with a porous heat insulation film 50, a porous heat insulation layer 20 not covered with a porous heat insulation film, a porous heat insulation layer 20 covered with a porous heat insulation film 50, etc. (when 4 layers of porous heat insulation layers 20 are covered with a porous heat insulation film 50 and 3 layers of porous heat insulation layers 20 are not covered with a porous heat insulation film, the energy-saving efficiency can reach about 23.7%), or, as shown in FIG. 4(B), from bottom to top, for example, each is a porous heat insulation layer 20 not covered with a porous heat insulation film, a porous heat insulation layer 20 covered with a porous heat insulation film 50, a porous heat insulation layer 20 not covered with a porous heat insulation film, etc. On the other hand, in the porous heat insulation layer 20 of the multilayer heat insulation structure 10 according to the present invention, the stacking pattern of the porous heat insulation layer 20 covered with the porous heat insulation film 50 and the porous heat insulation layer 20 not covered with the porous heat insulation film is, for example, the porous heat insulation layer 20 covered with the porous heat insulation film 50 and the porous heat insulation layer 20 not covered with the porous heat insulation film are first stacked on each other, and then the porous heat insulation layer 20 not covered with the porous heat insulation film is stacked on the stacked porous heat insulation layer 20 covered with the porous heat insulation film 50. As shown in FIG. 4(C), when the 4-layer porous heat insulation layer 20 is covered with the porous heat insulation film 50 and the 3-layer porous heat insulation layer 20 is not covered with the porous heat insulation film, the energy-saving efficiency can reach about 25.3%. Alternatively, the porous heat insulation layer 20 covered with the porous heat insulation film 50 and the porous heat insulation layer 20 not covered with the porous heat insulation film 50 are first stacked on each other, and then the porous heat insulation layer 20 not covered with the porous heat insulation film 50 is stacked on the porous heat insulation layer 20 covered with the porous heat insulation film 50. As shown in FIG. 4(D), when the 4-layer porous heat insulation layer 20 is covered with the porous heat insulation film 50 and the 3-layer porous heat insulation layer 20 is not covered with the porous heat insulation film, the energy-saving efficiency can reach about 13.2%. Taking as an example the case where the porous heat-insulating layer is a glass fiber wool layer and a polyurethane layer, when the porous heat-insulating layer is a glass fiber wool layer with a single layer and a thickness of 10 mm, and a polyurethane layer with a single layer and a thickness of 20 mm, and a porous heat-insulating film is covered on one side surface of the polyurethane layer, the energy-saving efficiency of the multilayer heat-insulating structure according to the present invention is about 23.4%. That is, according to the present invention, it is not necessary to cover the porous heat-insulating film on both side surfaces of the polyurethane layer, and the effect of a certain energy-saving efficiency can be obtained, so the cost can be reduced. The above-mentioned one side surface refers to the surface of the polyurethane layer that contacts the glass fiber wool layer. And in the present invention, it is preferable that one side of the glass fiber wool layer contacts the back layer heat-resistant cloth, and the side of the polyurethane layer where the porous heat-insulating layer is covered contacts the other side of the glass fiber wool layer. In the above, the case where the porous heat-insulating film is covered on one side surface of the polyurethane layer is taken as an example for explanation, but the present invention is not limited thereto. In the second embodiment, although the cost increases, the porous heat-insulating film may be covered on both side surfaces of the polyurethane layer. For the same reason, the present invention can also use commercially available polyurethane as the material of the porous heat-insulating layer. Taking the above-mentioned polyurethane layer with a thickness of 20 mm as an example, the density of the polyurethane is 0.038 g / cm 3 The same as, or preferably smaller than this.

[0041] Refer to FIG. 5. FIG. 5 is a schematic diagram showing the structure of a third embodiment of the multilayer heat-insulating structure according to the present invention. In the third embodiment, the multilayer heat-insulating structure 10 according to the present invention is formed by stacking a plurality of porous heat-insulating layers 20 in a staggered or sequential manner. The porous heat-insulating layer 20 is selected from the group consisting of a glass fiber wool layer, a polyurethane layer, and a layer composed of a glass fiber wool layer and a polyurethane layer, and each porous heat-insulating layer 20 is covered with a porous heat-insulating film 50. That is, taking as an example the case where all the porous heat-insulating layers 20 are glass fiber wool layers, the surface of the cotton fiber of each glass fiber wool layer is covered with a porous heat-insulating film 50. Thus, the glass fiber wool layer covered with the porous heat-insulating film 50 is still porous. When the multilayer heat insulation structure 10 according to the present invention has a certain total thickness, the energy-saving efficiency achievable is higher than that achievable when the single-layer porous heat insulation film 50 is actually of the same total thickness. That is, when the multilayer heat insulation structure 10 according to the present invention has a certain total thickness, the energy-saving efficiency achievable is higher than that achievable when the single-layer glass fiber wool layer that is not covered by the porous heat insulation film 50 is actually of the same total thickness. Compared with the single-layer glass fiber wool layer (that is, filling the first heating jacket with a glass fiber wool layer having approximately the same total thickness as a control group), in the third embodiment, the glass fiber wool filled in the second heating jacket and used as the test waiting group has 7 layers in total, and when the thickness of each layer is 3 mm, its energy-saving efficiency can reach about 23%. Compared with the first embodiment, in the third embodiment of the present invention, in addition to using the surface of each porous heat insulation layer 20 as the heat insulation surface, a porous heat insulation film 50 is further added to all the porous heat insulation layers 20, so that the heat conduction can be further reduced. In this way, compared with a single-layer glass fiber wool layer having the same total thickness, according to the multilayer heat insulation structure 10 according to the present invention, the divergence of thermal energy to the outside can be surely and effectively reduced.

[0042] In the above second and third embodiments, the porous heat insulation material solution is uniformly coated on the surface of the porous structure of the porous heat insulation layer 20 by spraying or dipping, and then put into an oven to perform a baking process at about 50 to 70 degrees Celsius, so as to cover the porous heat insulation layer 20 with the porous heat insulation film 50. The above spraying method is preferably a low-pressure spraying method. The pressure of the spray gun is, for example, about 8 to 15 psi. In the present invention, the porous heat insulating material employed is a nano-scale inorganic-polymer nanocomposite material, which is, for example, a nano-scale inorganic material (5-40 wt%), an alkoxylsiloxane oligomer (5-45 wt%), an alkoxylsiloxane compound (5-45 wt%), a modified polymer (0.1-10 wt%) and a solvent (1-30 wt%). The inorganic material silicon is selected from the group consisting of carbon black, fullerene, graphene, glass fiber, clay and ceramics, and the clay is, for example, a layered silicate material (such as montmorillonite). The component of the ceramics is, for example, silica, titanium dioxide or aluminum oxide. The solvent is, for example, butanol. The structure of the above-mentioned alkoxylsiloxane oligomer is preferably a polyhedral structure between silicon dioxide (SiO 2 ) and siloxane (R 2 -SiO), and its chemical structural formula is (RSiO 1.5 )n, where n is, for example, 8, 10 or 12, and preferably 8. Taking the polyhedral alkoxylsiloxane oligomer as an example, it is a single-molecule crystal, and the molecular size is about 0.7 nm to 2 nm. The modified polymer is, for example, a siloxane-containing polyimide or a siloxane oligomer having a reactive substituent, and the above-mentioned reactive substituent is, for example, a double bond, a hydrogen group, a hydroxyl group, a chlorophenyl group, etc.

[0043] The feature of the present invention is that the porous heat insulating layer 20 and the porous heat insulating film 50 of the multilayer heat insulating structure 10 are all porous structures, and the porous heat insulating film 50 preferably covers only the surface of the porous structure of the porous heat insulating layer 20 (for example, the surface of the cotton fibers of the glass fiber wool layer), and conformally coats the surface of the porous structure of the porous heat insulating layer 20, but preferably does not sufficiently fill the fine pores of the porous structure (that is, the space between the cotton fibers). Thereby, the porous heat insulating layer 20 according to the present invention remains porous even when covered by the porous heat insulating film 50. Taking the example where the porous heat insulation layer 20 is a glass fiber wool layer, per gram of the porous heat insulation film 501, about 90 cm 2 ~3,600 cm 2 of the glass fiber wool layer can be covered, and it is preferable to cover about 180 cm 2 ~359 cm 2 In terms of weight ratio, the weight ratio of the porous heat insulation film 50 contained in the above glass fiber wool layer is about 1:0.2 to 1:0.7, and preferably 1:0.2. On the other hand, when the porous heat insulation layer 20 is a polyurethane layer, the weight ratio of the porous heat insulation film 50 contained in the polyurethane layer is similarly, for example, about 1:0.2 to 1:0.7, and preferably 1:0.2. As shown in FIG. 6, according to the present invention, when the weight ratio of the porous heat insulation film 50 to the glass fiber wool layer is about 1:0.2, the thermal diffusivity of the glass fiber wool layer can be reduced. In the present invention, the thermal conductivity after covering each glass fiber wool layer with the porous heat insulation film 50 is lower than the thermal conductivity when the porous heat insulation film 50 is not covered. Thus, according to the porous heat insulation film 50 according to the present invention, the energy-saving effect of the energy-saving heating jacket according to the present invention can be improved. In terms of the energy-saving effect, the energy-saving efficiency that can be achieved when the multilayer heat insulation structure 10 according to the present invention has a certain total thickness is higher than the energy-saving efficiency that can be achieved when a single-layer porous glass fiber wool layer actually has the same total thickness. Similarly, of course, it is also higher than the energy-saving efficiency that can be achieved when a single-layer porous glass fiber wool layer has a smaller total thickness.

[0044] According to the multilayer heat insulation structure, the energy-saving heating jacket and its covering, and the manufacturing method according to the present invention, there are the following effects. (1) The multilayer heat insulation structure is composed of a plurality of porous heat insulation layers stacked in a staggered or sequential manner. These porous heat insulation layers are a glass fiber wool layer, a polyurethane (PU) layer, or a glass fiber wool layer and a polyurethane layer. The glass fiber wool layer is a porous structure formed by arranging a plurality of cotton fibers in a staggered manner, and the polyurethane layer is a porous structure composed of a polyurethane foam. (2) Some or all of the porous heat insulation layers are selectively covered with a porous heat insulation film. (3) The material of the porous heat insulation film has good adhesion to the porous heat insulation layer (for example, the cotton fibers of the porous glass fiber wool layer). (4) The porous heat insulation film may form a porous structure on the porous heat insulation layer (for example, the glass fiber wool layer). As a result, the energy-saving efficiency is higher than 25%, which is energy-saving and environmentally friendly. (5) The multilayer heat insulation structure has good heat resistance, and problems such as dust pollution and the risk of PM 2.5 can be avoided due to the high-temperature decomposition of the multilayer heat insulation structure. (6) The energy-saving heating jacket can be applied to various types of vacuum components.

[0045] The above description is only an example and is not limiting. Any equivalent modifications or changes made without departing from the spirit and scope of the present invention are included in the claims.

Explanation of Signs

[0046] 10 Multilayer heat insulation structure 20 Porous heat insulation layer 50 Porous heat insulation film 100 Energy-saving heating jacket 110 Inner heat-resistant cloth 120 Outer heat-resistant cloth 125 Connector 130 Electric heating element 200 Object

Claims

1. Composed of a plurality of porous heat insulation layers stacked in a staggered or sequential manner, These adjacent porous heat insulation layers are selected from the group consisting of a glass fiber wool layer, a foam layer, and a combination of a glass fiber wool layer and a foam layer, The stacking gap is a heat insulation space, The foam layer is selected from the group consisting of an organic foam layer, an inorganic foam layer, and an organic-inorganic composite foam layer, The surface of the porous structure of a part of the plurality of porous heat insulation layers is covered with a porous heat insulation film, and the fine pores of the porous structure of a part of the plurality of porous heat insulation layers are not fully filled, whereby a part of the plurality of porous heat insulation layers remains porous, The multi-layer heat insulation structure is used to store thermal energy, The multi-layer heat insulation structure has a predetermined total thickness, and its energy-saving efficiency is higher than the energy-saving efficiency achievable by the glass fiber wool layer which is a single layer and has the same total thickness, Multi-layer heat insulation structure.

2. Among the plurality of porous heat insulation layers, only a part of the porous heat insulation layers are covered with the porous heat insulation film, and the part of the porous heat insulation layers remains porous. Thereby, the energy-saving efficiency achievable when the multi-layer heat insulation structure has the total thickness is higher than the energy-saving efficiency achievable when the glass fiber wool layer which is a single layer has the same total thickness. The multi-layer heat insulation structure according to Claim 1.

3. The surface of the porous structure of the remaining porous heat insulation layers is covered with the porous heat insulation film, and the fine pores of the porous structure of the remaining porous heat insulation layers are not fully filled, whereby the remaining porous heat insulation layers remain porous. The multi-layer heat insulation structure according to Claim 1.

4. The weight ratio of the part of the porous heat insulation layer and the porous heat insulation film contained therein is 1:0.2 to 1:0.

7. The multi-layer heat insulation structure according to Claim 1.

5. The porous heat insulation layer is a glass fiber wool layer with a thickness of 3 mm and 7 layers, and the energy-saving efficiency of the multi-layer heat insulation structure is in the range of 13.2% to 25.3%. The multi-layer heat insulation structure according to Claim 1.

6. The porous heat-insulating layer is a glass fiber wool layer with a thickness of 10 mm per layer and a polyurethane layer with a thickness of 20 mm per layer, and one surface of the polyurethane layer is covered by the porous heat-insulating film, and the energy-saving efficiency of the multilayer heat-insulating structure is 23.4%. The multilayer heat-insulating structure according to claim 1, characterized in that.

7. The porous heat-insulating film conformally coats the surface of the porous structure of the remaining porous heat-insulating layer and does not sufficiently fill the fine pores of the porous structure of the remaining porous heat-insulating layer, whereby the remaining porous heat-insulating layer is still porous. The multilayer heat-insulating structure according to claim 3, characterized in that.

8. The porous heat-insulating film conformally coats the surface of the porous structure of the part of the porous heat-insulating layer and does not sufficiently fill the fine pores of the porous structure of the part of the porous heat-insulating layer, whereby the part of the porous heat-insulating layer is still porous. The multilayer heat-insulating structure according to claim 1, characterized in that.

9. The weight ratio of the remaining porous heat-insulating layer to the porous heat-insulating film contained therein is 1:0.2 to 1:0.

7. The multilayer heat-insulating structure according to claim 3, characterized in that.

10. The porous heat-insulating layer is a glass fiber wool layer with a thickness of 3 mm in 7 layers, and the energy-saving efficiency of the multilayer heat-insulating structure is 23%. The multilayer heat-insulating structure according to claim 1, characterized in that.

11. The material of the organic foam layer is selected from the group consisting of polyurethane, polystyrene, polypropylene, polyethylene, and clusters of polystyrene and polyethylene. The material of the inorganic foam layer is selected from the group consisting of glass-based microbeads, expanded perlite, closed perlite, and rock wool. And / or the material of the organic-inorganic composite foam layer is a composite material composed of the material of the organic foam layer and the material of the inorganic foam layer. The multilayer heat-insulating structure according to claim 7, characterized in that.

12. The porous heat insulation film is an inorganic substance, a siloxane oligomer (Alkoxysiloxane Oligomer), a siloxane compound (Alkoxysiloxane compound), a modified polymer or a solvent, and the inorganic substance is selected from the group consisting of carbon black, fullerene, graphene, glass fiber, clay and ceramics. The multilayer heat insulation structure according to any one of claims 1 to 11, characterized in that

13. The thickness of each of the porous heat insulation layers is in the range of 3 mm to 6 mm, and the total number of layers of the porous heat insulation layers is 3 to 8 layers. The multilayer heat insulation structure according to claim 1 or 2, characterized in that

14. It is for heating or heat insulation of an object, A back layer heat-resistant cloth for contacting the object, An outer layer heat-resistant cloth, An electric heating element and the multilayer heat insulation structure according to any one of claims 1 to 11, provided between the back layer heat-resistant cloth and the outer layer heat-resistant cloth, The electric heating element is for providing thermal energy, The multilayer heat insulation structure is for accumulating the thermal energy, and an energy-saving effect by heat insulation can be obtained, The energy-saving efficiency of the multilayer heat insulation structure is in the range of 13.2% to 25.3%. Energy-saving heating jacket.

15. The object is a pipe joint, a scrubber, an extraction pump or a valve. The energy-saving heating jacket according to claim 14, characterized in that

16. The outer shape of the energy-saving heating jacket is the same as or different from that of the object, and the outer shape of the energy-saving heating jacket is planar or three-dimensional. The energy-saving heating jacket according to claim 14, characterized in that

17. A heat insulation space is formed between the multilayer heat insulation structure and the electric heating element. The energy-saving heating jacket according to claim 14, characterized in that

18. Covered with the energy-saving heating jacket according to claim 14, and being a pipe joint, a scrubber, an extraction pump or a valve. Object.

19. Characterized by being applied to the energy-saving heating jacket according to claim 14. Manufacturing method.

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