JPS60245995A - Heat accumulating device - Google Patents

Abstract

PURPOSE:To reduce the width of temperature distribution by a method wherein the filling amount of heat accumulating agent poured into a vessel at the center of a heat accumulating mat is made bigger than the same poured into the vessels at the outer peripheral sections of the mat to prevent the temperature of the central vessel from becoming higher than the temperatures of the peripheral vessels. CONSTITUTION:The heat accumulating device is consisting of a plurality of vessels 3 accommodating the heat accumulating agent, the heat accumulating mat 4 connecting the plurality of vessels 3 and heaters 5 attached to the plurality of vessels 3. The filling amount of heat accumulating agent, poured into the vessels 12 near the central section of the mat, is made bigger than the same poured into the vessels 3 in other sections. The vessel, filled with increased filling amount of heat accumulating agent, requires much amount of heat to rise the temperature thereof and, therefore, the temperature of the vessel is not risen to a temperature higher than the same of the peripheral vessels. On the other hand, the width of temperature distribution may be reduced by this method. In case the vessel 3 having the highest temperature is covered locally by a warm keeping material and the temperature is increased further, the temperature of overcooling preventing material, accommodated in the vessel 3, becomes lower than the temperature of heat resisting life and generation of overcool phenomenon may be prevented without spoiling the function of overcool preventing material.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a heat storage device using a latent heat storage material.

Structure of the conventional example and its problems As shown in FIGS. 1 and 2, this type of conventional heat storage device has a heat storage material 1 and releases latent heat when the heat storage material 1 radiates heat after melting. , a heat storage mat 4 in which a plurality of containers 3 containing supercooling prevention material 2 are connected to each other to prevent the supercooling phenomenon of cooling as a liquid without solidifying; a heater 5 and a heat insulating material 6 attached to the container 3; It was composed of.

In this configuration, when the heat storage mat 4 is placed horizontally, the heater 5 is energized to generate heat, and the heat storage material 1 is melted and then controlled to a constant temperature, the heat storage material 1 stored in the container 3 of the heat storage mat 4 is The temperature was not uniform, and the temperature distribution had high and low ranges.

Figure 3 shows the temperature distribution of each container 3 of the heat storage mat 4, where 7 is the temperature distribution of the heat storage material 1 housed in each container 3 in the A-A' direction, and 8 is the temperature distribution in the B-B' direction. The temperature distribution of the heat storage material 1 stored in each container 3 is as follows.
In both cases, the temperature was high near the center, and the temperature was low at the outer periphery.

Further, FIG. 4 shows the time-temperature characteristics of the heat storage material 1 stored in each container 3 after heating by the heater 5 is started. 9 is the temperature of the heat storage material 1 stored in the container 3 with the highest temperature, and 10 is the temperature of the heat storage material 1 stored in the container 3 with the lowest temperature. During time t1 to t2, the heat storage mat 4 is placed horizontally, and the temperature is controlled to a constant temperature after melting from the start of energization to the heater 5 to reach an equilibrium state. Temperature characteristics 1o of the heat storage material 1
The temperature characteristic 9 of the heat storage material 1 stored in the container 3 with the highest temperature is such that the melting point is 01 or more, and the temperature characteristic 9 of the heat storage material 1 stored in the container 3 with the highest temperature is below the heat-resistant life temperature 02 of the supercooling prevention material 2 that prevents the supercooling phenomenon of the heat storage material 1. controlled.

By the way, the melting point θ1 of this heat storage material 1 and the supercooling prevention material 2
The temperature range of the heat-resistant life temperature θ2 is large (for example, as the heat storage material 1, sodium acetate is used.

Trihydrate, sodium pyrophosphate as a supercooling prevention agent, 1. If you choose a combination of O water salts, the melting point θ1 will be 58°C1
The heat-resistant life temperature θ2 is 80'C, which is only about 20°C. Therefore, when the vicinity of the container 3 having the highest temperature is locally covered with a heat insulating material 11 such as a cushion between times t2 and t3, the temperature characteristic 9 of the heat storage material 1 increases, and finally the supercooling prevention material 2 The heat-resistant life temperature θ2 was easily exceeded.

When the heat storage material 1 is used for heat radiation, there is a problem in that a supercooling phenomenon occurs in which the material remains liquid and does not release latent heat even if the temperature falls below the melting point θ1.

OBJECT OF THE INVENTION The present invention solves such conventional problems. If it is locally covered with a heat insulating material, the heat-resistant life temperature of the supercooling prevention material will be easily exceeded, and the function of the supercooling prevention material will be lost.
In order to prevent the supercooling phenomenon from occurring, the purpose is to reduce the difference in temperature distribution between the central part and the outer periphery of the heat storage mat.

Structure of the Invention In order to achieve this object, the present invention increases the amount of heat storage material filled into the container at the center of the heat storage mat compared to the amount filled into the containers at the outer periphery.

With this configuration, the container in the center of the heat storage mat, where the temperature tends to rise, requires more heat to heat the heat storage material than the peripheral part of the heat storage mat, and the temperature is balanced with the container in the outer periphery. It doesn't get expensive either. Therefore, even if it is locally covered with a heat insulating material, the heat-resistant life temperature of the supercooling prevention material will not be exceeded, and the occurrence of the supercooling phenomenon can be prevented.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 5 to 7. Note that the same members as in FIGS. 1 to 4 are given the same numbers.

In FIG. 5, 12 is a container filled with an increased amount of heat storage material 1, and is provided in the center of the heat storage mat 4, where the temperature tends to rise.

In the above configuration, since the container 12 provided near the center where the temperature was high is filled with a large amount of heat storage material 1, it requires a large amount of heat, and the temperature becomes the same as that of the container 3 in the peripheral area, causing a temperature distribution. It comes out evenly.

FIG. 6 shows the temperature distribution of each container 3 of the heat storage mat 4. 1
3 is the temperature distribution in the C-C' force direction, and 14 is the temperature in the D-D' direction, but the distribution is small near the center and in the outer periphery.

Next, FIG. 7 shows the time-temperature characteristics after the start of heating with the heater 5. 9' is the temperature of the heat storage material 1 stored in the container 3 with the highest temperature, and 10 is the temperature of the heat storage material 1 stored in the container 3 with the lowest temperature, but the temperature range is small. Even in the case where the container 3 with the highest temperature is locally covered with the heat insulating material 11 between time t2 and t3,
The heat-resistant life temperature θ2 of the supercooling prevention material 2 is not exceeded.

Therefore, occurrence of supercooling phenomenon can be prevented.

Note that the container 12 filled with the increased amount of heat storage material 1 is not limited to the vicinity of the center of the heat storage mat 4, but can of course be provided in a high temperature area as shown in FIG.

Effects of the Invention As described above, according to the heat storage device of the present invention, as the temperature increases, the temperature distribution width becomes wider and the container filled with an increased amount of heat storage material is provided near the central part. Because of this, the filled container requires more heat and its temperature does not rise any higher than the surrounding container. In addition, the temperature distribution width can be made smaller, and even if the highest temperature container is locally covered with heat insulating material and the temperature rises further, it will still be below the heat-resistant life temperature of the supercooling prevention material. Functionality is not impaired (and supercooling phenomenon can be prevented from occurring).

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional heat storage device, Fig. 2 is a partial sectional view of a conventional heat storage device, Fig. 3 is a temperature distribution characteristic diagram of a conventional heat storage device, and Fig. 4 is a temperature distribution characteristic diagram of a conventional heat storage device. time characteristic diagram,
FIG. 5 is a perspective view showing an embodiment of the heat storage device of the present invention, FIG. 6 is a temperature distribution characteristic diagram of the heat storage device of the present invention, FIG. 7 is a temperature one-hour characteristic diagram of the heat storage device of the present invention, and FIG. FIG. 8 is a perspective view showing another embodiment of the present invention. 1 Heat storage material, 2 Supercooling prevention material, 3... Container, 4
Heat storage mat, 5... Heater, 12 Container with increased capacity. Name of agent: Patent attorney Toshi Nakao, Idiot 1
Figure 3 Figure 3 Figure 4 Figure 1 Hour Figure 6 C

Claims (1)

[Claims] It consists of a plurality of containers storing heat storage materials, a heat storage cloak formed by connecting the plurality of containers, and a heater attached to the plurality of containers. A heat storage device with a larger amount of heat storage material than other parts of the container.