JPH0114491B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat storage device that is used as a heating/heating device and uses a heater as a heat source for melting a latent heat storage material.

Configuration of conventional example and its problems As shown in FIG. 1, in a conventional heat storage device of this type, a heater 4 having a built-in temperature detection section is placed in a container 3 containing a latent heat storage material 1 and a supercooling prevention material 2. A controller 5 is installed and controls energization to the heater based on a temperature detection signal from a temperature detection section built into the heater 4. In this configuration, when a part of the container 3 is covered with the heat insulating material 6 such as a cushion, the amount of heat radiated from the container 3 decreases in that part, compared to other parts not covered with the heat insulating material 6.
Although the temperature rises, the temperature does not rise above a certain level, which is controlled by the temperature detection section of the heater 4. By controlling this temperature below the allowable temperature limit of the supercooling prevention material 2 mixed in the latent heat storage material 1, supercooling that would cause the supercooling prevention material 2 to lose its function will not occur. However, since the temperature detection section built into the heater 4 detects the temperature of the heater 4 itself, it starts turning on and off even before the temperature of the latent heat storage material 1 reaches the melting point, resulting in a problem that the heat storage completion time becomes longer. It had Furthermore, since the temperature of the heater 4 is controlled, there is a problem in that it is not possible to reliably detect whether or not the latent heat storage material 1 in a portion away from the heater 4 is melted.

Another conventional example will be explained using FIG. 2. The heater 7 does not have a built-in temperature detection section. The temperature detection line 8 is attached to the opposite surface of the container 1 to which the heater 7 is attached, and the power to the heater 7 is controlled by the controller 9 based on the detection signal of the temperature detection line 8.

In this configuration, since the temperature detection wire 8 is attached to the surface opposite to the mounting surface of the heater 7, the detection wire 8
If detects the melting point of the latent heat storage material 1, all of the latent heat storage material 1 in the container 2 has melted, and compared to a configuration in which the temperature of the heater 7 is detected, the latent heat storage material 1 can be melted more reliably. Can be done. However, container 3
When a part of is covered with a heat insulating material 6 such as a cushion,
The amount of heat dissipated in that area decreases, and the temperature tends to rise compared to other uncovered areas. The function of the cooling prevention material 2 is lost, and even if the latent heat storage material 1 stops energizing the heater 7 and starts dissipating heat after melting, there is a problem that the latent heat cannot be released at the freezing point, which causes a supercooling phenomenon.

Purpose of the invention The present invention solves such conventional problems,
When a part of the container is covered with a heat insulating material, the temperature of the latent heat storage material in the covered part increases and the supercooling prevention material loses its function, preventing supercooling from occurring during heat dissipation. When heating a latent heat storage material with a heater, the purpose is to prevent the heater from starting to turn on and off before the latent heat storage material reaches its melting point, and to melt the latent heat storage material in a short time. do.

Structure of the Invention To achieve this objective, the present invention provides a container with:
A heater with a built-in detection part is installed, and a temperature detection wire is installed on the opposite side to the surface on which the heater is installed, and the temperature detection wire is used as the detection signal source from the time the heater starts energizing until the latent heat storage material reaches its melting point. After the melting point is reached, the temperature detection wire is not used, and a controller is provided to control the heater temperature using a detection section built into the heater.

With this configuration, from the start of heating to the latent heat storage material until the opposite side reaches the melting point, electricity is applied continuously without turning on and off, thereby reliably melting the entire latent heat storage material in a short time. Furthermore, after the melting point is reached, a part of the container is covered with heat insulating material by controlling the heater temperature to below the heat resistance temperature of the supercooling prevention material using the detection unit built into the heater. Even if the temperature of the latent heat storage material rises, it will not exceed the heat resistance temperature of the supercooling prevention material, and the occurrence of supercooling can be prevented.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In FIG. 3, the same members as in FIGS. 1 and 2 are designated by the same numbers.

In FIG. 3, a heater 4 having a built-in temperature detection section is attached to the heater attachment surface of the container 3, and a temperature detection line 8 is attached to the opposite surface of the container.
Furthermore, from the start of heating until the temperature detection line 8 detects the melting point of the latent heat storage material, the heater 4 is energized using the temperature detection line 8 as a detection signal source.
After the melting point has been detected, a controller 10 is provided that controls the heater 4 by switching the temperature detection section built into the heater 4 as a detection signal source.

In the above configuration, when melting the latent heat storage material 1, the controller 10 energizes the heater 4 using the temperature detection line 6 as a temperature detection signal source. At the start of heating, the detection section built into the heater 4 is not used as a temperature detection signal source. When the temperature detection line 8 detects the melting point, the temperature detection unit built into the heater 4 is switched as a temperature detection signal source, and the heater 4 is controlled to a predetermined set temperature. When the opposite side reaches the melting point, all of the latent heat storage material 1 in the container 3 has been melted, and since the heater 4 is continuously energized, heat storage can be completed in a short time. Even if a part of the container 3 is covered with the heat insulating material 6, by setting the control temperature of the heater 4 below the heat resistance temperature of the supercooling prevention material 2, the temperature of the latent heat storage material 1 can be maintained at the same level as that of the supercooling prevention material 2. The temperature can be kept below the heat-resistant temperature, and overcooling can be prevented.

Effects of the Invention As described above, according to the heat storage device of the present invention, a heater with a built-in temperature detection section is attached to the heater contact surface of the container, a temperature detection wire is attached to the opposite surface, and furthermore, the opposite surface is fixed from the start of heating. Until the melting point is reached, the temperature detection line is used as a temperature detection signal source,
From then on, the temperature detection part built into the heater is used and a controller is installed to keep the heater temperature constant, so the opposite side of the container reaches the melting point of the latent heat storage material, and all of the latent heat storage material is removed. The heater can be energized continuously without turning on and off until the material melts, and the latent heat storage material can be melted in a short time. Moreover, after melting, the temperature detection unit built into the heater controls the heater to below the heat-resistant temperature of the supercooling prevention material, so even if part of the container is covered with heat insulating material, the temperature of the latent heat storage material will not rise. The temperature does not rise above the heat resistance temperature of the supercooling prevention material, and the occurrence of supercooling can be prevented.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a conventional heat storage device, FIG. 2 is a sectional view of another conventional heat storage device, and FIG. 3 is a sectional view of an embodiment of the heat storage device of the present invention. 1...Latent heat storage material, 2...Supercooling prevention material, 3...
...Container, 4...Heater, 8...Temperature detection line, 10
...Controller.

Claims (1)

[Claims] 1. A container that stores a latent heat storage material, a heater that is attached to the heater mounting surface of this container and has a built-in temperature detection section, a temperature detection line that is attached to the opposite surface of the container and that detects the container temperature, and When heating the heat storage material starts, the temperature detection line is used as a temperature detection signal source, and when this temperature detection line detects the melting point of the latent heat storage material, from then on, the temperature detection section built in the heater is used as a temperature detection signal source. A heat storage device comprising: a controller that controls the heater to a temperature lower than the allowable temperature limit of the latent heat storage material.