JPH0611145A - Heat storage board for floor heating - Google Patents

Abstract

PURPOSE:To provide a heat storage board for a floor heating in which heat radiating amount in the daytime is suppressed and sufficient heat radiating amount can be assured even at night. CONSTITUTION:A heat storage board for a floor heating has a vessel 1 in which latent heat storage material 2 containing inorganic hydrate salt as a main ingredient is sealed. The vessel 1 is partitioned therein into a plurality of spaces communicating with each other. The board comprises a plurality of trigger 4 for relieving subcooling at one or a plurality of places inside the vessel 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage board for floor heating.

[0002]

2. Description of the Related Art A floor heating device utilizing radiant heat uniformly heats a room to stimulate a warm point of a human body, and thus constitutes a comfortable heating system. In recent years, such a floor heating device has been used with a heat storage structure mainly for the purpose of energy saving. That is,
Heat or solar heat generated using inexpensive late-night power, or waste heat from another heat source is stored in a heat storage material and the heat is used during heating.

Up to now, a sensible heat storage material such as concrete or brick has been used as the heat storage material. However, recently, a latent heat storage material that has a larger amount of heat storage per volume than these sensible heat storage materials and is capable of storing and releasing heat at a constant temperature has been put into practical use. The latent heat storage material utilizes latent heat associated with a phase change between solid and liquid, between solid and solid, and is, for example, sodium sulfate decahydrate (Na ₂ SO ₄ · 10).
H ₂ O), paraffins, fatty acid esters and the like are known.

[0004]

However, since the conventional heat storage board itself does not have a function of suppressing heat dissipation, heat dissipation starts immediately after the end of heat storage. For example, in the case of heat storage floor heating that uses late-night power, the room temperature during the daytime, when heating is not much required, rises, whereas the room temperature during the nighttime when the temperature is low falls. An object of the present invention is to provide a heat storage board that solves the above problems.

[0005]

SUMMARY OF THE INVENTION The gist of the present invention is to provide a floor heating heat storage board comprising a container 1 enclosing a latent heat storage material 2 containing an inorganic hydrate salt as a main component. Is partitioned into a plurality of spaces communicating with each other, and at the same time, the heat storage board for floor heating is characterized by having a trigger 4 for opening supercooling at one or a plurality of locations inside the container 1. The latent heat storage material only needs to have an inorganic hydrated salt that causes supercooling as a main component, and is not limited to its type and additive.

As a trigger, a method of cooling a part,
There is a method of stimulating with a needle from the outside, a method of applying an electric current, a method of using a nucleating material that is solid in the heat storage material and does not disperse, a method of using ultrasonic waves, but the method is not limited. Also,
The direction of the partition within the container may be either horizontal or vertical.

[0007]

[Operation] The operation of this configuration is shown below.

After the heat storage on the floor heating heat storage board is completed, the latent heat storage material causes a supercooling phenomenon and does not radiate heat even below the freezing point. Therefore, when the supercooling is released by a trigger at one or more points in the board, crystallization starts from that part and latent heat is radiated. The crystallization rate of the inorganic hydrated salt varies depending on the substance, but is influenced by its viscosity, degree of supercooling and the like. That is, as the viscosity is smaller and the supercooling degree is larger, the crystal acceleration increases. Immediately after the end of heat storage, the degree of supercooling is small and the crystallization rate is low. However, the degree of supercooling increases with the passage of time, and the rate of crystallization increases and the amount of heat radiation also increases. Therefore, if the container partition and the crystallization rate of the heat storage material are designed so that heat release ends exactly at the heat storage start time, heat release will be suppressed when the daytime temperature is high, and heat release will be large when the temperature is low at night. A heat storage board for floor heating can be obtained.

[0009]

An embodiment of the present invention will be described below with reference to the drawings.

As the latent heat storage material 2, sodium thiosulfate pentahydrate (Na ₂ S ₂ O ₃ 5H ₂ O) was used. In general, the crystallization rate of a hydrated salt is proportional to the square of the supercooling degree (temperature difference from the freezing point), and the proportional constant of sodium thiosulfate pentahydrate is about 0.1 cm 2 / hr · ° C. When the degree of supercooling increases in proportion to time (for example, the degree of supercooling [×
° C] = 1.25 [x ° C / hr] x elapsed time [hr]
), And after 16 hours, crystallization is carried out at a linear distance of 213 cm. Therefore, a heat storage board for floor heating in which a latent heat storage material 2 is enclosed in a container 1 having a partition 3 as shown in FIG. 1 is manufactured. With this board, under the above conditions, crystallization is completed within about 16 hours from the start of crystallization. This state will be described in more detail. The floor heating board was heated for 8 hours from 23:00 to 7:00 by the heater 5 by using the midnight power. Using the Peltier element 4 as a trigger, a part of the floor heating heat storage board was cooled immediately after the end of heat storage to start crystallization. Crystallization proceeded in the direction of the arrow, and heat dissipation was completed at approximately 23:00 the following month. The change in the latent heat radiation amount at this time is shown in FIG. Thus, immediately after the heat storage, the latent heat was little dissipated and the rise in room temperature was suppressed, and when the temperature dropped at night, the latent heat dissipation increased and the room temperature could be maintained. In this way, the daily use cycle of the floor heating heat storage board is completed.

[0011]

According to the heat storage board for floor heating of the present invention,
It is possible to prevent the temperature rise during the daytime and the temperature fall during the nighttime, which are the drawbacks of the heat storage floor heating using the latent heat storage material.

[0012]

[Brief description of drawings]

[0013]

FIG. 1 is a perspective view showing an embodiment of the present invention.

[0014]

FIG. 2 is a diagram showing an elapsed time after completion of heat storage and a latent heat radiation amount.

[0015]

[Explanation of symbols]

 1 Container 2 Latent Heat Storage Material 3 Partition 4 Trigger 5 Heater

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[Procedure amendment]

[Submission date] November 6, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

As the latent heat storage material 2, sodium thiosulfate pentahydrate (Na ₂ S ₂ O ₃ 5H ₂ O) was used. Generally, the crystallization rate of hydrated salts is proportional to the square of the supercooling degree (temperature difference from the freezing point), and the proportional constant of sodium thiosulfate pentahydrate is about 0.1 cm / h · ° C ² ) . When the degree of supercooling increases in proportion to time (for example, degree of supercooling [°
C] = 1.25 [° C / h] × elapsed time and [h]), and 213 cm crystallized in linear distance after 16 hours. Therefore, a heat storage board for floor heating in which a latent heat storage material 2 is enclosed in a container 1 having a partition 3 as shown in FIG. 1 is manufactured.
In this board, about 16 from the start of crystallization under the above conditions
Crystallization ends in time. This state will be described in more detail. The floor heating board was heated for 8 hours from 23:00 to 7:00 by the heater 5 by using the midnight power. Using the Peltier element 4 as a trigger, a part of the floor heating heat storage board was cooled immediately after the end of heat storage to start crystallization. Crystallization proceeded in the direction of the arrow, and heat dissipation was completed at approximately 23:00 the following month. The change in the latent heat radiation amount at this time is shown in FIG.
In this way, the latent heat dissipation was small immediately after heat storage and the rise in room temperature was suppressed, and when the temperature dropped at night, the latent heat dissipation increased and the room temperature could be maintained. In this way, the daily use cycle of the floor heating heat storage board is completed.

Claims (1)

[Claims] 1. A latent heat storage material 2 containing an inorganic hydrate salt as a main component.
In a heat storage board for floor heating consisting of a container 1 in which the inside of the container 1 is enclosed, the interior of the container 1 is partitioned into a plurality of spaces that communicate with each other, and a trigger 4 for opening the subcooling is provided at one or more positions inside the container 1. A heat storage board for floor heating characterized by having.