JP2008089186A - Planar heat storage sheet and product utilizing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a planar heat storage sheet and a product utilizing the same capable of storing a large amount of heat. <P>SOLUTION: In this planar heat storage sheet 14, a flat bag body 10 formed by adhering the circumference of two sheets of stacked synthetic resin sheets 1A, is planarly partitioned in a grid-like or striped state to form sections 12, a latent heat type heat storage material 8 is filled in these sections 12, and the heat storage material 8 filled in each of the small sections 12 is separated so as to be capable of independently melted/solidified at prescribed temperatures. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heat storage material capable of accumulating a large amount of heat. More specifically, a plurality of flat bags are filled with heat storage materials having different melting temperatures, and the heat storage material having a high melting temperature is changed to a heat storage material having a low temperature. The present invention relates to a heat storage material capable of storing a large amount of heat by stacking in order and configured such that melting or solidification of the heat storage material proceeds in a predetermined direction from the heat storage material side having a high melting temperature to the low heat storage material side.

For example, a floor heating apparatus is generally used in which a planar electric heater or hot water pipe is disposed in the floor structure and the floor plate is heated by supplying hot water from the heat generated by the electric heater or from the boiler to the hot water pipe. In addition, a combination of a heater such as a sheet electric heater and a latent heat type heat storage material is proposed that uses nighttime power to heat the heat storage material at night using the nighttime power to store the amount of heat of the latent heat of fusion of the heat storage material (For example, see Patent Documents 1, 2, and 3).
Japanese Unexamined Patent Publication No. 7-49260 JP 7-42961 A Japanese Patent Laid-Open No. 7-198281

  It seems that sodium sulfate 10 hydrate (Na2 SO4 .10H2 O) is the most frequently used heat storage material used in the heat storage body incorporated in the floor heating system because of its excellent heat storage and heat dissipation performance. The melting point of the material is 32.4 ° C. This heat storage material is solid at room temperature, but starts to melt when a temperature equal to or higher than the melting point is heated, and stores a large amount of heat energy as latent heat until the whole melts. And when room temperature falls and it becomes the temperature which operates a floor heating apparatus, it will thermally radiate from the said thermal storage material, and heating performance will be exhibited, but it solidifies slightly below the said temperature by this heat radiation. A large amount of latent heat is stored when it is melted by receiving heat, and is used for floor heating or the like by utilizing the property of releasing it during heating.

  Typical examples of the latent heat storage material include sodium sulfate decahydrate and sodium borate decahydrate as described above. When this is used, it is formed into a thin bag or filled into a pipe-shaped container to form a sheet-type heat storage body or a pipe-type heat storage body, which is provided in the floor structure.

  In addition, the floor heater using this heat storage material is heated and melted by using low-cost electric power night electricity to store the heat energy of latent heat, and in the time when people in the morning are active The heater of the floor heating device is energized to operate the floor heating device, and the heater is heated by heat radiation from the electric heater and the heat storage body. When the floor temperature falls below the temperature at which the heat storage material is solidified, floor heating is performed while energizing the electric heater as necessary to perform additional cooking. Depending on the floor structure, this heat storage material can be stored in the case of a concrete floor, but in the case of a concrete floor, a pipe-type heat storage body housed in a pipe-shaped container is used. A sheet type or flat plate type heat storage body in which a heat storage material is filled in a bag body using a synthetic resin sheet is mainly used.

  For example, in the case of the pipe-type heat accumulator, a polypropylene pipe having a diameter of 27 mm and a length of 1200 or 600 mm is used in parallel (for example, five) and used in parallel. Are often used with a width of 200 mm, a length of 800 mm, and a thickness of 5 mm.

  The heat storage material releases heat and becomes solid at room temperature, and absorbs heat to become a liquid, thereby storing heat for latent heat mainly by heat absorption, and changing to become solid by radiating about the stored latent heat. Therefore, it is important to perform a reversible change that smoothly melts and solidifies.

(About supercooling phenomenon)
However, when the heat storage material made of sodium sulfate is in the form of one pipe-type heat storage body or one thin bag-type heat storage body, and this is not partitioned at all, when the heat storage material is filled, In relation to the amount of filling, heat is not transferred smoothly and the “supercooling phenomenon” occurs.

  This “supercooling phenomenon” means that the heat storage material repeatedly changes its phase of liquefaction due to heat absorption and solidification due to heat dissipation, and the properties of the heat storage material gradually change, such as “hard pebbles or gravel”. Crystal is formed. When these pebbles are dispersed and generated in the heat storage material, they gradually spread and grow, and eventually exist in a solid state even when heated above the melting temperature. This solidification of the heat storage material no longer has the heat storage effect, and it becomes a rough touch as if pebbles or gravel were housed in a thin bag. When the properties change to this state, the properties of the heat storage material are completely lost. This phenomenon is a supercooling phenomenon.

  This change to solidification is related to the trees of the heat storage material, the temperature to be used, and the amount of heat storage material handled as one lump, but empirically, in order to prevent this supercooling phenomenon, The shape and size of the stored heat storage body are limited as described above. In particular, in floor heating in a Japanese-style house, a thin bag body or a flat plate heat storage body is provided in the floor structure, and this is arranged on the upper surface of the electric heater to absorb heat.

(Body in extreme heat, battery in cold region, long-term insulation of bath)
When a heat storage body formed in a thin bag shape is incorporated as a floor heating device for a house, it has a relatively large size and is excellent in workability, and it is one of the heat storage materials in consideration of the supercooling phenomenon. It is easy to limit the volume as a group. In addition, there is an advantageous method of performing additional energization when the amount of heat radiation is insufficient due to the temperature of the outside air.

  However, in the case of a battery mounted on an automobile used in a cold region, for example, the electromotive force due to the low temperature is reduced and the frictional resistance between each part of the engine, in particular, the piston and the cylinder is large. Power consumption is large, and the electric capacity of the battery is easily used.

  In addition, when a car is parked in the hot summer season, the ceiling of the car body is heated to a high temperature.For example, if there are infants in the car body, hyperthermia or dehydration can occur in a short time. There is a risk of death.

  Furthermore, recently, it is called a 24-hour bath, and the temperature of the bath is kept constant at all times, and the family bathing time varies, so every time a person takes a bath, additional cooking is necessary. There was also an economic problem.

(Object of invention)
The present invention is a method in which a supercooling phenomenon does not occur, and a flat plate heat storage sheet capable of storing a large amount of heat energy, which has not been considered in the past, a laminated heat storage body using this heat storage sheet, and a metal such as a flat aluminum tube Providing a high-temperature heat storage body using a tube, a battery heat insulation device using the flat plate heat storage sheet, an oil pan heat insulation device using a flat metal tube, and water insulation related to a fuel cell It aims at providing the thermal storage body which can be utilized for various uses, such as an apparatus.

  Moreover, it aims at providing the thermal storage body etc. which use the flat heat storage sheet | seat which can be used for an above described various use, a flat metal tube, etc.

In order to achieve the above object, the present invention is configured as follows.
(Flat heat storage sheet)
1) A flat bag formed by laminating two synthetic resin sheets and adhering the periphery of the sheet is further formed into a grid pattern in a plane, or in the form of a strip, a horizontal stripe pattern. A small room is formed by partitioning, each of the small rooms is filled with a latent heat type heat storage material, and the heat storage material filled in each small room is independently separated so as to melt and solidify at a predetermined temperature. It is said.

  By dividing the thermal storage material and making it independent, the cycle of melting and solidification, which is the behavior of thermal energy storage and heat dissipation, can be accurately repeated.

2) In the grid-like or horizontal striped small room constituting the flat plate heat storage sheet, there is a heat storage material divided into small quantities so as not to cause a supercooling phenomenon while the heat storage material repeatedly absorbs and dissipates heat. It is characterized by being filled.
By preventing overcooling, the heat storage material can be used stably over a long period of time.

  3) At least one of the synthetic resin sheets is a composite sheet obtained by laminating and bonding a metal foil having excellent thermal conductivity on one side of the synthetic resin sheet, and the metal foil is exposed on the surface side and arranged. It is characterized by being.

  Since the metal foil is provided on the sheet constituting the flat bag body, the heat storage and heat dissipation cycle can be performed accurately and efficiently.

  4) The synthetic resin sheet has a laminated structure, and is provided with a material made of a molecularly oriented polymer that is hard to be scratched on the surface and excellent in strength, and a soft material with excellent thermal adhesion on the inner surface side. The thickness of the entire sheet is 100 to 200 μm, and a metal foil with good thermal conductivity is laminated on the surface side.

  If the total thickness of the sheet is between 100 and 200 μm, it can be incorporated into applications that have limitations on dimensions, such as workability, handleability of the finished flat plate heat storage sheet, and floor heating device. Not restricted by the standard. On the other hand, if it is thinner than 100 μm, it is easy to break during handling, and if it is thicker than 200 μm, there is a problem in that heat energy is transferred and it is difficult to follow the workability, especially along the curved surface.

  5) The synthetic resin sheet has a laminated structure, the surface layer is a stretched polyester film or nylon, the back layer is a linear low density polyethylene or low density polyethylene, and an aluminum foil is provided on the surface layer side. It is characterized in that a layer is formed.

  By using a polyester film or nylon film biaxially stretched at least on the surface of the sheet, a bag body that is not easily damaged can be produced.

(Laminated body / stacking order of flat heat storage sheet)
6) A flat bag made of a synthetic resin sheet is partitioned into a grid pattern to form small rooms, and each small room is filled with a heat storage material, and the heat storage material filled in each small room. Is a flat plate heat storage sheet that melts and solidifies by itself, and a laminated body using a plurality of similar flat plate heat storage sheets, and the heat storage material filled in each of the plate heat storage sheets is The laminate of the plate-shaped heat storage sheets has a property of melting and solidifying at different temperatures, and is arranged in the order in which the melting point is high on one side and the melting point sequentially decreases on the other side. is doing.

  A large amount of heat storage can be performed by combining different heat storage materials of the flat plate heat storage sheet. By adopting the structure of this heat storage sheet, it can be applied to uses that did not exist in the past.

  7) A flat bag made of a synthetic resin sheet is divided into a grid pattern in a plane to form small chambers, and a plurality of flat plate heat storage sheets each of which is filled with a heat storage material are stacked. In the laminate of flat heat storage sheets, the heat storage material of each flat heat storage sheet has the property of melting and solidifying at different temperatures, and the flat heat storage sheet has a high melting point on one side and on the other side. The melting points are arranged in order of decreasing sequentially, and further, heat conduction is assisted by interposing a metal foil or a metal layer having a similar heat transfer action between each flat plate heat storage sheet.

  When laminating a flat plate heat storage sheet, a heat storage effect can be exhibited as a whole laminate by interposing a thin metal foil between the sheets.

(Heat storage using metal pipe)
8) Heat storage material is filled inside a flat aluminum tube having a synthetic resin film for protecting the heat storage material and aluminum tube on the inner surface, and the aluminum tube is pressed at a predetermined length to partition the small room to store heat. A pipe-type heat storage member characterized in that the material is made independent, and the adjacent heat storage material is phase-changed independently.

  By using a pipe-type heat storage member using a flat metal pipe, it can be easily used for high-temperature applications, for example, heat retention of oil in an engine oil pan. If the pipe is about the size of an oil pan for keeping warm, even if it is filled without dividing it into small chambers, the problem of supercooling does not occur.

(How to insulate the ceiling of an automobile)
9) A space in which a flat heat storage sheet as described in 6) or 7) above is filled in a ceiling portion of a space where a person such as a vehicle lives and a heat storage material having a high melting temperature is filled on the heat absorption surface side. A material filled with a low-temperature heat storage material is arranged on the side, and the temperature rise in the space is delayed by configuring the heat-storing material on the heat-absorbing surface side to be melted sequentially from a high-heat storage material to a low heat-storage material. This is a temperature control device for a vehicle or the like that is configured as described above.

  An excellent heat shielding effect can be exhibited by using one or more thin flat plate heat storage sheets according to the application. In particular, when the vehicle is parked under a hot sun, a considerable heat shielding effect can be exhibited only by arranging the heat storage sheet on the ceiling of the vehicle.

(Battery insulation device)
10) A heat retention device using the flat plate heat storage sheet according to claim 6 or 7 on a heat radiation surface of an electric device that needs to maintain a predetermined temperature such as a vehicle battery, wherein the heat retention device is a device side The heat storage material is arranged in the order of the melting temperature of the low temperature heat storage material from the heat storage material having a high melting temperature to the outer surface side, and the heat storage material in a molten state by heat storage sequentially dissipates and solidifies from the heat dissipation surface side. It is the heat retention apparatus of the electric equipment characterized by preventing the cooling of.

(Engine oil pan thermal insulation device)
11) The pipe-type storage member according to claim 8 is arranged inside or outside of the oil pan of the vehicle engine, or inside and outside, and the heat storage material absorbs the heat quantity of oil during operation of the engine to store heat. An oil pan heat retaining device characterized in that the oil pan is configured as described above.

(Hot bath water keeping device)
12) On the outer surface of the bath tub, the laminate of the flat plate heat storage sheets described in 6) or 7) is disposed in contact with the bath tub side of the flat plate heat storage sheet having a heat storage material having a high melting point, A heat retention device for a bath tub, characterized in that a part of the amount of heat in the bath tub is stored by a laminate of heat storage sheets.

  By forming a layer of heat storage material on the outer surface of the bath tub, it is possible to effectively store the amount of heat when the bath is used, and to save fuel costs by using this heat storage.

(Application to rooms that require heat insulation)
13) The laminated body of the flat plate heat storage sheet according to claim 6 or 7 is disposed on a heat absorbing surface of a room or container that requires heat insulation, or a heat radiating surface of a room or container that requires heat insulation. The temperature control method is characterized in that the temperature inside the room or the container is prevented from changing.

  By using the heat storage sheet according to the present invention, compared to the case of conventional heat insulation means, it is possible to enhance the heat insulation effect according to the season, that is, the heating effect at the time of heating, and efficiently the cooling effect at the time of cooling. Can provide a temperature control method.

  The technical idea of the present invention is to use more than the amount of normal heat storage material used, accumulate more heat energy than before and increase heat retention, or reduce heat transfer to increase indoor temperature. It is in.

  Specifically, a flat heat storage sheet is formed by filling each bag-like body with latent heat storage materials having melting points at different temperatures.

  And by using these flat heat storage sheets, laminating in order from the highest melting point of the heat storage material to the lower one, and placing the one filled with the heat storage material having a high melting point on the heat source side The melting point is changed step by step, and the heat storage materials having different melting points are melted according to the order, and a large amount of latent heat is stored during that time.

  On the contrary, when the stored heat energy is dissipated, heat can be stored and dissipated step by step due to the difference in melting point, so that a large amount of heat energy can be stored for a long time compared to conventional heat storage devices. It can dissipate heat.

  In addition, by arranging a flat heat storage sheet, or in some cases, one flat heat storage sheet on the back side or the front side of the ceiling of an automobile body, the temperature rise in the vehicle can be increased according to the amount of heat absorbed by the heat storage sheet. It is possible to suppress the rise in room temperature especially in summer. Further, when the inside of the body is heated, the heat storage sheet absorbs heat and stores heat, so that it can be changed to heating in the vehicle.

  As other application fields, the heat storage effect can be used for various uses such as battery heat insulation, improvement of engine startability associated with heat insulation of engine oil in the engine oil pan.

Next, embodiments of the present invention will be described with reference to the drawings.
1. Manufacturing Process of Thin Plate Heat Storage Material FIG. 1 is an explanatory view showing a manufacturing process of a laminated sheet of a synthetic resin sheet and an aluminum foil for manufacturing a flat plate heat storage sheet 14 (see FIGS. 5 and 6) according to the present invention. is there.

  A composite sheet (or a composite film) is used as the synthetic resin sheet 1. This composite sheet has three layers of a high-strength stretched nylon film (not easily scratched) as a surface layer, a stretched nylon film as an intermediate layer, and a low-density polyethylene (adhesive layer: L-LDPE, LDPE) sheet as an inner layer. A laminate film (having a thickness of 100 to 150 μm). Then, the synthetic resin sheet 1 and the aluminum foil 2 (having a thickness of 100 μm) are laminated to produce a composite sheet for producing a bag 10 to be described later.

  The synthetic resin sheet 1 is supplied at a predetermined speed by the first roll R1 forming the pinch roll, and gives a slight tension between the second roll R2 disposed adjacent to the first roll R1, An aluminum foil 2 (having a protective layer on the surface) unwound from the aluminum foil roll A at the second roll R2 portion by radiating radiant heat from the heater H installed above to heat the upper surface of the sheet 1 The sheet 1 is laminated on the upper surface.

  The next third roll R3 is pressed and bonded together. The third roll R3 is pressed by a large-diameter cooling roll r1 and a plurality of small-diameter rolls r2 and r3 arranged around the roll r1 to form a laminated sheet together with cooling.

  FIG. 2 is an explanatory view of a main part of the lamination step of the synthetic resin sheet 1 and the aluminum foil 2, and a thin adhesive layer having thermal adhesiveness is previously formed on the surface of the synthetic resin sheet 1, The adhesive layer becomes the softened layer m by the radiant heat of the heater H. And the aluminum foil 2 (a protective layer for preventing oxidation and durability is formed on the surface. The aluminum foil itself has improved reflectivity and electrical characteristics, and increased strength of the synthetic resin sheet. 1) is laminated, and these are pressed with the mating surface of the roll to form the laminated sheet 1A. This laminated sheet 1A is one of important materials for forming a flat bag 10 described later.

  FIG. 3 is an explanatory view of a bag making process, for example, using a normal synthetic resin sheet 1 (the composite sheet) in which an aluminum foil is not laminated on one surface (lower surface) of the bag body 10 (FIG. 5), and an upper surface. The case where the laminated sheet 1A manufactured in the above process is used is described. As shown in the drawing, the laminated sheet 1A and another sheet 1 are combined, and the side edges on both sides are welded with the melted part e of a predetermined width using a heating roll to form one flat cylindrical body 5. Manufacture continuously.

  FIG. 4 shows a process of bonding the cylindrical body 5 manufactured as described above in a parallel line shape with a predetermined width. From the upper surface of the flat cylindrical body 5, a parallel line heating roll R4 is shown. To form a welded wire in parallel.

  The parallel wire heating roll R4 is formed with a flange p1 that presses both edges against the filament, and a plurality of flanges p2 that are pressed and welded between the flanges p1 at a predetermined distance. By using this parallel line heating roll R4, one bag body 10 (FIG. 5) is formed in a state in which a large number of vertically arranged small cylinders are arranged.

  When a plurality of welding processes may be used, a small tubular body having an arbitrary width is formed by forming a welding line at an appropriate interval using a simple heating roll having a single flange. Can do.

  If the bag body 10 (FIG. 5) having a large number of vertical joining lines 6 is continuously manufactured as described above, the bag body 10 (FIG. 5) is cut at a predetermined length L, and the length L and width of specified dimensions are obtained. An “intermediate material” consisting of B is produced.

  Next, as shown in FIG. 6, a predetermined amount of the heat storage material 8 is filled into a row of a plurality of cylindrical bodies 7 divided by the plurality of joining lines 6. Since the heat storage material 8 is in a liquid state when heated to a melting temperature or higher, it is filled in a large number of cylindrical bodies 7 in this state (first filling method).

(Another filling method: second filling method)
In this example, a method is described in which the heat storage material 8 is filled all at once over the entire length of the tubular body 7 and divided into small portions. However, when the temperature of the heat storage material 8 is sufficiently controlled, a plurality of tubes are used. A predetermined small amount of heat storage material 8 is filled in a horizontal row of the solid bodies 7. And the bag of the heat storage material divided | segmented by forming the welding wire in the horizontal direction is formed. Next, a small amount of heat storage material 8 similar to the above is filled in a horizontal row, and a weld line is formed in the horizontal direction on the liquid surface of the heat storage material 8. This method is the same method as when filling a seasoning or the like into a normal sachet.

(Guideline for filling heat storage material)
Sodium sulfate 10 hydrate is used as the heat storage material of the heat storage material 8. A bag body 10 having a width of 800 mm and a length of 1000 mm is formed, and the heat storage material 8 is filled in the tubular body 7 formed in the bag body 10, and the “thickness after the filling” In the case of a “5 mm” sheet, the volume of the heat storage material 8 is preferably about 1 kg per 0.9 to 1.2 kg / 0.4 m ² .

  Although the thickness of the heat storage material sheet is related to the amount of heat storage, in consideration of handleability and the like, it is about 3 to 9 mm.

  In the (first filling method), if the heat storage material 8 is filled in each of the cylindrical bodies 7 formed in the bag body 10 as described above, the opening 9 (inlet) shown in FIG. 5 is welded. Close it to make it an intermediate product.

  Next, this intermediate product is placed on a horizontal base, and a heating roll having a single or a plurality of flanges is used for the welding wire 11 in the lateral direction (direction of width B) as shown in FIG. Form. As a result, a large number of “small rooms 12” filled with the heat storage material 8 are arranged in a grid pattern. The small chambers 12 filled with the heat storage material 8 divided by the above-described series of steps are formed in an arrayed state like a grid (FIG. 5).

  FIG. 5 and FIG. 6 show the completed form of the flat plate heat storage sheet 14 referred to in the present invention, and this is a basic member of the present invention described below.

  5 and 6 are for a large area, but when the width of the bag is narrow, the flat heat storage sheet 14 is striped so as to insert a welding line in the lateral direction. Will be welded.

(Use of multiple heat storage sheets)
In the present invention, it is necessary to consider the heat storage material in order to use a plurality of the plate-shaped heat storage sheets 14 in a laminated state. In other words, when a plurality of heat storage sheets are formed by filling the same heat storage material and heat is applied from one side, if the temperature of the heat source that contacts the heat storage sheet is not so high, the heat storage material that does not melt Part may occur.

  The kind of “heat storage material” used for the flat plate heat storage sheet 14 used in the laminated structure is a material as described below, and is used in appropriate combination so that there is a difference in predetermined melting temperature.

(Example of latent heat storage material)
Erythritol [melting point: 119 ° C., hereinafter () indicates melting point. ], Sodium acetate (58 ° C), polyethylene glycol (40-50 ° C), sodium thiosulfate (48 ° C), paraffin (C22) (44 ° C), paraffin (C20) (36.4 ° C), sodium sulfate (32 .4 ° C.), calcium chloride (29.7 ° C.), etc.

(Specific example of laminated heat storage sheet)
FIG. 7 is a perspective view showing the structure of the flat plate heat storage sheet 14 shown in FIGS. 5 and 6 and the like and the laminated heat storage sheet 16 assembled by placing the aluminum foil 2 between the heat storage sheets 14. . The heat storage sheet 16 uses a sheet heat storage sheet 14 (U) having a melting temperature of “high temperature” on the upper surface and a sheet 14 (2) having a melting temperature “lower” than the above temperature. However, the difference in melting temperature is stepped.

  The reason for making a difference in the melting temperature of the heat storage material is that, for example, by using a high temperature material for the first layer 14 (U) close to the heat source, the second layer. When the temperature rises while accumulating heat, the heat storage material in the next layer is melted by the heat. By continuously performing this heating / melting operation, heat can be stored in the entirety of the plurality of flat plate heat storage sheets 14.

  Therefore, when heat is stored, the heat energy is absorbed as indicated by the arrow Q to sequentially melt the heat storage material and transmitted to the lower stage via the aluminum foil 2. When all the heat storage materials are melted in this way, the maximum heat storage state is obtained. When the stored thermal energy is dissipated, the heat energy moves as indicated by an arrow q, and the heat storage material whose temperature is lowered below the melting point changes to a solid phase.

  In this manner, by stacking a plurality of the heat storage sheets 14 having a difference in melting temperature of the heat storage material, the heat energy can be stored in each heat storage sheet 14 in a cascade manner. This means that a large amount of heat storage material can be used in the same place, and the heat absorption and heat dissipation can be repeated efficiently while suppressing the occurrence of the "supercooling phenomenon" of the poor characteristics of latent heat storage materials. It can be done.

  By using such a flat heat storage sheet in a composite manner, an amount (thickness) of the heat storage material that is difficult to use by the conventional method can be used without any problem.

(Pipe type heat storage)
FIG. 8A shows a pipe-type heat storage using an aluminum pipe 20 having a synthetic resin protective layer 19 formed on its inner surface as a container filled with a heat storage material using a flat aluminum pipe 20A formed flat as shown in FIG. It forms the body. When the amount of the heat storage material to be filled in the flat aluminum pipe 20A is within a range that does not cause a supercooling phenomenon, it is not necessary to divide the heat storage material in one pipe 20A. Can be used. However, in the case of an application using the long pipe 20A, it is necessary to divide the heat storage material appropriately and separate it.

  In FIG. 9, flat aluminum pipes 20A filled with a heat storage material are arranged in a plane, and this is arranged by a band 21 to improve the handleability as a flat metal pipe type heat storage body 22.

(Automobile ceiling heat shield)
FIG. 10 shows a heat shield device in which flat heat storage sheets 14X and 14Y are brought into contact with the lower surface of a ceiling plate 23 of an automobile and the lower surfaces thereof are supported by a support plate 24 (reinforced resin plate). In the case of this apparatus, the sheet having a heat storage material that melts at a high temperature is on the sheet 14X side that receives a large amount of solar heat.

  Thus, by using the flat plate heat storage sheets 14X and 14Y using heat storage materials having different melting temperatures, the heat from the sun is effectively utilized by utilizing the melting of the latent heat storage material, particularly stepwise melting. Heat can be shielded, the speed of temperature rise in the vehicle can be considerably slowed, and the maximum temperature can be lowered.

  It should be noted that depending on the amount and type of the heat storage material of the flat plate heat storage sheet to be used, the effect can be sufficiently exhibited even by using one sheet.

(Battery insulation device)
FIG. 11 and FIG. 12 relate to a heat insulating device for a battery mounted on a vehicle used in a cold region. A heat insulating receiving plate 27 is fixed on a support base 26 integral with a vehicle body of an automobile, and this heat insulating receiving plate is shown. A battery 28 is placed inside the plate 27, and a heat insulating cover 29 is provided to cover the battery 28.

  The heat insulating cover 29 is formed by laminating and forming flat plate heat storage sheets 14e, 14f, and 14g, and the sheets 14e, 14f, and 14g include a heat storage material having a high melting temperature on the inner sheet 14g side. A heat storage material having a low melting temperature is used on the outer sheet 14e side.

  Although not shown in the figure, heating means such as a hot water pipe or a small electric heater that is heated by heat energy generated during operation of the engine is provided in the heat insulation cover. All of the heat storage material constituting the cover 29 is melted to store a large amount of heat.

  And even if the engine is stopped and the outside air decreases, the heat can be gradually released from the heat insulating cover 29 to keep the temperature low, preventing the temperature of the parked battery from decreasing, and the next day's engine can be started smoothly. It is something that can be done.

(Engine oil pan thermal insulation device)
FIG. 13 shows the outer surface of the oil pan 31 which is the lower structure of the engine E, in which the metal pipe-type heat accumulators 22A and 22B described in FIG. 9 are laminated and the outer surface is protected by a heat insulating protective cover 32. Yes.

  FIG. 14 shows a heat retaining device in which metal pipe-type heat storage bodies 22C and 22D are provided inside the oil pan 31.

  The heat storage material inside the heat storage bodies 22A to 22D receives heat by the heat during operation of the engine E and stores the heat in a molten state. For example, even when the engine E stops at night and is cooled, By using heat storage, the temperature of the engine oil can be prevented from decreasing as much as possible to prevent the viscosity of the engine oil from decreasing, and the next engine can be easily started.

(Heat insulation device such as bath tub)
FIG. 13 is borrowed, and the oil pan 31 is described as a bath tub (bathtub). When the outer surface of the oil pan 31 is a flat plate heat storage sheet 14 as shown in FIGS. By using a sheet (for example, one having the structure of FIG. 7 or a modification thereof), the heat energy of hot water while using the bath is diverted to store heat in the laminated heat storage sheet, It is possible to prevent a decrease in the temperature of hot water when not in use.

  Since the present invention employs a structure in which heat storage materials are formed in a plurality of layers and heat is stored or dissipated step by step, by utilizing this idea, a portion such as a house where heat insulation materials are used is also shielded. It can be used as a means of heat or heat retention.

It is the schematic of the manufacturing process of the composite sheet used for the heat storage material of this invention. It is explanatory drawing of the lamination process of the film of FIG. 1, and aluminum foil. It is the schematic of the manufacturing process of a bag. It is explanatory drawing of the process of forming a joint line in a longitudinal direction in parallel with a bag. It is a manufacturing-process figure of a flat heat storage sheet. It is sectional drawing of the flat heat storage sheet shown in FIG. It is a perspective view which shows the laminated structure of a flat heat storage sheet. (A) is a circular pipe and (B) is a sectional view of a flat pipe. FIG. 9 is a front sectional view of a heat storage body using the flat pipes shown in FIG. 8 in parallel. It is sectional drawing of the ceiling part of the motor vehicle which uses a flat heat storage sheet. It is sectional drawing which shows the heat retention structure of a battery. It is a partially cutaway sectional view of a heat insulating cover using a flat plate heat storage sheet laminate. It is sectional drawing which shows the heat retention structure which uses a pipe-type heat storage material for the outer surface of an oil pan. It is sectional drawing which shows the heat retention structure which uses a pipe-type heat storage material for the inner surface of an oil pan.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Synthetic resin sheet 2 Aluminum foil A Aluminum foil roll R1 1st roll R2 2nd roll R3 3rd roll R4 Parallel heating roll r1 Cooling roll p1 Cage-like part 5 Tubular body 6 Welding wire 7 Tubular body 8 Thermal storage Material 9 Opening 10 Bag body 11 Welding wire 12 Small room 23 Automotive ceiling panel 28 Battery 29 Thermal insulation cover 31 Oil pan of engine

Claims (13)

  A flat bag formed by adhering the periphery of the synthetic resin sheet, which is a combination of two sheets, is further divided into a grid or stripe shape in a plane to form small rooms, and latent heat is generated in each of these small rooms. A flat plate heat storage sheet characterized in that the heat storage material filled with a mold heat storage material and separated into each small chamber is independently melted and solidified at a predetermined temperature.   The grid-like or striped small chamber constituting the flat plate heat storage sheet is filled with a small amount of heat storage material that does not cause a supercooling phenomenon while the heat storage material repeatedly absorbs heat and releases heat. The flat heat storage sheet according to claim 1.   At least one of the synthetic resin sheets is a composite sheet obtained by laminating and bonding a metal foil having excellent thermal conductivity on one surface of the synthetic resin sheet, and the metal foil is disposed so as to be exposed on the surface side. The flat heat storage sheet according to claim 1 or 2, wherein   The synthetic resin sheet has a laminated structure, the surface is hard to be scratched, and a material composed of a molecularly oriented polymer having excellent strength, and a flexible material with excellent thermal adhesiveness is provided on the inner surface side. The flat heat storage sheet according to claim 2, wherein the thickness of the entire sheet is 100 to 200 µm, and a metal foil with good thermal conductivity is laminated on the surface side.   The synthetic resin sheet has a laminated structure, the surface layer is a stretched polyester film or nylon, the back layer is linear low density polyethylene or low density polyethylene, and an aluminum foil layer is further provided on the surface layer side. It forms, The flat heat storage sheet in any one of Claim 1 thru | or 4 characterized by the above-mentioned. A flat bag made of a synthetic resin sheet is divided into a grid or stripe shape in a plane to form small rooms, and each small room is filled with a heat storage material, and the heat storage filled in each small room. The material is composed of a flat plate heat storage sheet that melts and solidifies by itself and a plurality of similar flat plate heat storage sheets to form a laminate, and heat storage that is filled in each of the plate heat storage sheets The material has the property of melting and solidifying at different temperatures,
The laminate of flat heat storage sheets is arranged in the order in which the melting point is high on one side and the melting point sequentially decreases on the other side. A flat bag made of a synthetic resin sheet is divided into a grid or stripe in a plane to form small rooms, and a plurality of flat plate heat storage sheets filled with heat storage material divided into each small room are laminated. In the laminated body of the flat plate-shaped heat storage sheet,
The heat storage material of each of the flat plate heat storage sheets has a property of melting and solidifying at different temperatures, and the flat plate heat storage sheets are arranged in the order in which the melting point is high on one side and the melting point is sequentially decreased on the other side. 7. The flat plate heat storage sheet according to claim 6, further comprising a metal foil or a metal layer having a similar heat transfer function interposed between the flat plate heat storage sheets to assist heat conduction. Laminated body.   A flat aluminum tube having a synthetic resin film formed on the inner surface is filled with a heat storage material, and the state of the aluminum tube or a long tube is pressed at a predetermined length to divide the small room into a heat storage material. A pipe-type heat storage member, characterized in that it is configured to be independent and adjacent to the heat storage material to change phase independently.   A ceiling portion of a space where a person such as a vehicle lives is filled with the plate-shaped heat storage sheet according to claim 6 or 7 and a heat storage material having a high melting temperature on the heat absorption surface side. A material filled with a low-temperature heat storage material is arranged so that melting is sequentially performed from a heat storage material having a high melting temperature on the heat absorption surface side to a low heat storage material so as to delay the temperature rise in the space. A temperature control device for a vehicle or the like, characterized by comprising. In the heat retaining device using the flat plate heat storage sheet according to claim 6 or 7, on a heat radiating surface of an electric device that needs to maintain a predetermined temperature such as a vehicle battery,
The heat retaining device is arranged in the order of the melting temperature of the low-temperature heat storage material on the outer surface side from the heat storage material having a high melting temperature on the device side, and the heat storage material in a molten state by heat storage sequentially dissipates from the heat-radiation surface side. A heat retaining device for an electrical device, wherein the device is configured to prevent cooling of the device by solidifying.   9. The pipe-type storage member according to claim 8 is arranged inside or outside of an oil pan of a vehicle engine, or inside and outside, and the heat storage material receives heat quantity of oil during operation of the engine to store heat. An oil pan heat insulating device characterized by being configured as described above.   A laminate of the flat heat storage sheet according to claim 6 or 7 is disposed on the outer surface of the bath tub, and a flat heat storage sheet having a heat storage material having a high melting point is disposed on the side of the bath tub. A heat retention device for a bath tub that is configured to store a part of the amount of heat in the bath tub.   The laminated body of the flat plate heat storage sheet according to claim 6 or 7 is disposed on a heat receiving surface of a room or container that requires heat insulation, or a heat radiating surface of a room or container that requires heat insulation. A temperature control method characterized by being configured to prevent a change in temperature inside the room or container.

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