JPH0213729A - Latent heat-storing material container and heat storage type radiant heating apparatus based thereon - Google Patents

Abstract

PURPOSE:To make a container for latent heat-storage material free from deformation due to repetition of the heating and cooling by forming in both the planes grooves in which a linear or tube-shaped heating element is fitted and which are similar in area or matched in shape between the two planes. CONSTITUTION:A container 1 of latent heat-storing material the two planes of which are similar in surface area and do not differ much in expansion coefficient between the two and which resists deformation under stress can be formed out of a metal, synthetic resin, synthetic rubber, composite of such materials, or the like which is noncorrosive and has no appreciable moisture-permeability by forming in both the planes a plurality of straight grooves 2, 3 in which a linear or tube-shaped heating element is fitted and which are matched in shape between the two planes. In a container 1 for latent heat-storage material of a heat storage type radiant heating apparatus the grooves in which the heating element 2 is fitted are formed continuously and the heating element is laid along and in tight contact with the grooves. As a result, in a heat storage type radiant heating apparatus, it does not occur for the appearance of the apparatus or the heating effect to be impaired by formation of unevenness on the surface or by separation of the heating element from the groove.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a latent heat storage material container and a heat storage type radiant heating device.

[Conventional technology] A heat storage type radiant heating device combines a heating element and a heat storage material with a large heat capacity, and by temporarily storing heat in the heat storage material with a large heat capacity, the temperature of the heat generating surface of the heating device is equalized and the heating operation is stopped. This heating device is designed to prevent sudden room temperature drops later in the day, and to reduce maintenance costs by using electricity late at night.

There are devices that use sensible heat storage materials such as concrete, mortar, and bricks as heat storage materials, and devices that use latent heat storage materials.

Latent heat storage materials are heat storage materials that utilize the properties of substances that store heat when melting and radiate heat when they solidify.Latent heat storage materials have characteristics such as a large amount of heat storage per volume and small temperature changes during heat storage and release. The device used has features such as being smaller in size compared to devices using sensible heat storage materials, and being able to utilize heat in a specific temperature range.

In a heat storage type radiant heating system that combines a linear or tubular heating element and a latent heat storage material, a groove portion for accommodating the linear or tubular heating element is provided in advance in the latent heat storage material container, and the heating element is placed on a base material that has been provided with heat insulation properties. If the latent heat storage material container is laid in the groove, and then the heating element is laid along the groove, the work of laying the heating element becomes very simple, which improves workability, and the accuracy of laying the heating element is good. Since the heating element is in close contact with the latent heat storage material, the thermal conductivity between the heating element and the latent heat storage material is improved, the melting state of the latent heat storage material is uniform, and a storage type radiant heating device with excellent heating characteristics is obtained.

The present invention is aimed at improving the latent heat storage material container used in this heat storage type radiant heating device.

[Problems to be Solved by the Invention] A latent heat storage material container used in combination with a linear or tubular heating element repeats thermal expansion and contraction when heated by the heating element and when cooled by heat radiation from the heat storage material. A latent heat storage material container in which a groove portion for accommodating a linear or tubular heating element is provided on one side of the container has the disadvantage that the surface having the groove portion becomes convex and curves due to this thermal expansion and contraction. . As a result, unevenness may occur on the surface of the storage type radiant heating device, or the heating element may come off from the groove, causing a number of problems in terms of the device's appearance, heating effectiveness, etc.

[Means for Solving the Problems] The present inventors have developed a latent heat storage material container having a groove portion for accommodating a linear or tubular heating element that does not undergo deformation that would cause practical soil problems due to repeated heating and cooling. As a result of repeated studies, we have determined that grooves for accommodating linear or tubular heating elements are provided on both sides of the container, and that the areas of the grooves are approximately the same on both sides of the container, or The shape is on both sides of the container.

The present invention was completed based on the finding that a container for latent heat storage material having a symmetrical shape does not undergo deformation that would cause practical problems due to repeated heating and cooling.

That is, the present invention relates to a flat latent heat storage material container used in a heat storage type radiant heating device that combines a heating element and a latent heat storage material filled in a sealed container.

It is characterized in that a plurality of groove portions for accommodating linear or tubular heating elements are formed on both sides of the container.

The shape of the groove portion in which the linear or tubular heating element is accommodated is not particularly limited.2For example, one surface of the container may have a plurality of straight lines, and the other surface may have a plurality of straight lines and a linear or tubular shape connected thereto. A straight or curved groove is formed that folds back the heating element.

The latent heat storage material container of the present invention can be used with a linear or tubular heating element housed only on one surface.

[Effects of the Invention] The latent heat storage material container repeats thermal expansion and contraction due to heating by the heating element and cooling of the heat storage material.

The degree of thermal expansion and contraction varies depending on the location of the container, and is greatest in the groove portion that is in contact with the heating element, and gradually decreases as the distance from the heating element increases. Moreover, the expansion coefficients of the container and the latent heat storage material are different.

The latent heat storage material undergoes a volume change with phase change, and expands slightly when it changes from liquid to solid.

A latent heat storage material container that has a groove portion on one side of the container for accommodating a linear or tubular heating element is subjected to stress due to the difference in surface area on both sides of the container and the difference in expansion coefficient with the latent heat storage material. It seems that the surface with the part is convex and curved. For this reason, by providing grooves on both sides of the container to accommodate the linear or tubular heating elements and making them symmetrical in shape, the surface areas on both sides of the container are almost the same, and the difference in expansion coefficient is small and stress is reduced. A container that is not easily deformed even when By using such a latent heat storage material container, the conventional problems of unevenness occurring on the surface of the heat storage type radiant heating device and the heating element coming off from the groove portion, which impairs the appearance of the device and the heating effect, etc., are solved. This is what I discovered.

[Example] The present invention will be explained in more detail below with reference to the drawings, but the present invention is not limited to these.

FIG. 1 is an example of a schematic perspective view of a latent heat storage material container that can be used in the present invention. 1 is a latent heat storage material container, and the latent heat storage material container is made of metal with low moisture permeability and non-corrosion;
It is made of materials such as synthetic resin, synthetic rubber, or composites of these materials. Examples of the shape of the container include a flat plate with a hollow interior, a container with a plurality of rib structures, and a container with a plurality of partition walls. Reference numeral 2 denotes a plurality of linear grooves for accommodating the heating elements provided in one surface of the latent heat storage material container, and 3 indicates a plurality of linear groove portions for accommodating the heating elements provided in the other surface of the latent heat storage material container. It is a plurality of straight groove portions provided. The plurality of groove portions provided in the container are desirable for accommodating a long linear or tubular heating element based on a straight line, but groove portions for folding back the heating element are also required.

FIGS. 2 and 3 are other examples of schematic perspective views of latent heat storage material containers that can be used in the present invention. 1 is a latent heat storage material container, and the shape of the groove part in which the linear or tubular heating element is accommodated is such that one side of the container is connected to a plurality of straight lines 2 and the other side is connected to a plurality of straight lines 3. It has a curve AI4.5 for folding back the linear or tubular heating element. The shape and spacing of the grooves are determined by the installation capacity, shape, etc. of the heating element.

If a space layer is created between the heating element and the latent heat storage material, there is a risk that the heat conduction from the heating element to the latent heat storage material will be impaired and sufficient heat storage will not be possible, so the heating element and the latent heat storage material should be in close contact. There is a groove part on the side. When configuring a heat storage type radiant heating unit, a plurality of latent heat storage material containers shown in FIGS. 1 to 3 can be used in combination.

FIG. 4 is an example of a schematic perspective view of the heat storage type radiant heating device of the present invention. 1 is the latent heat storage material container explained in FIG. The latent heat storage material container is laid so that the groove portion in which the heating element is accommodated is continuous. 2 is a heating element housed in a groove provided in the latent heat storage material container. The heating element is placed in close contact with the groove portion provided in the latent heat storage material container. The heating element that can be used in the present invention is a linear or tubular heating element, such as an electric linear heating element, a rod-shaped heating element, or a heating medium at a predetermined temperature in a linear or rod-shaped conductor. It is also possible to use a heating element that heats by flowing water, or a heating element that uses a material with good heat conductivity, such as a heat vibrator.

As a heating element that heats a wire or rod-shaped conductor by flowing a heat medium at a predetermined temperature, for example, a heat medium such as hot water, oil, steam, hot air, etc. at a predetermined temperature heated by various heat sources, and a metal or synthetic resin. It is a heating element etc. that is introduced into a conductor such as a pipe made of aluminum to heat it. 3 is a latent heat storage material that is sealed and filled in a container. Examples of the latent heat storage material that can be used in the present invention include inorganic salt hydrates, and specifically Na25Oa ・l
0H20 or a mixture of this with NaCl, KCI, etc., Mg CI 2.6H20 or a mixture of this with MgC+
Mixture of 2'6H20, MgB'r2・6H20, etc., Na 2 S 203 ・5 H20+ CH
Examples include 3COON a and 3H20. These usually contain supercooling prevention agents, thickening agents, and the like.

Further, as the organic compound, paraffin, polyethylene glycol, etc. can also be used. 4 is a heat insulating material, and heat insulating materials made of ordinary inorganic fibers, synthetic resins, synthetic rubber foams, etc. can be used. Reference numeral 5 is a concrete slab or wood-based base material for the building frame on which the heat storage type radiant heating device is installed. In Fig. 4, there is a heat insulating material 4 on the base material 5, but there may be a heat insulating material under the base material. The latent heat storage material is placed on this insulating base material. 6 is a finishing material.

The heat storage type radiant heating device using the latent heat storage material of the present invention is, for example, a radiant heating device installed on the floor, wall, ceiling, etc., using electricity, hot water, or other heat medium as a heating element. By using materials to store heat, it is possible to equalize the temperature of the heat-generating surface of a radiant heating system, prevent a sudden drop in room temperature after heating operation is stopped, and reduce maintenance costs by using late-night electricity. .

[Brief explanation of the drawing]

FIG. 1, FIG. 2, and FIG. 3 are schematic perspective views of a latent heat storage material container. 1. Latent heat storage material container 2. 3. 4. 5. This is the groove portion that accommodates the heating element. FIG. 4 is a schematic perspective view of the heat storage type radiant heating device. 1. Latent heat storage material container 2) Heating element 3. Latent heat storage material sealed in the container 4. Heat insulating material 5. Base material 6. Finishing material. FIG. 1 is a schematic perspective view of a latent heat storage material container. FIG. 2 is a schematic perspective view of a latent heat storage material container. FIG. 3 is a schematic perspective view of a latent heat storage material container. FIG. 4 is a schematic perspective view of a regenerative heat storage type radiant heating device.

Claims (1)

[Claims] 1) A linear or tubular heating element is housed in a flat latent heat storage material container used in a heat storage type radiant heating device that combines a heating element and a latent heat storage material filled in a sealed container. A latent heat storage material container having groove portions on both sides of the container. 2) A heat storage type radiant heating device using the latent heat storage material container according to claim 1.