JPS60129598A - Heat accumulating device - Google Patents

Abstract

PURPOSE:To prevent generation of overcooling upon dissipating heat as well as starting of ON- OFF operation of a heater from a time when the temperature of latent heat accumulating agent in the device has not arrived at the melting point thereof by controlling the temperature of the heater through a temperature detecting wire and a detecting unit accommodated in the heater. CONSTITUTION:The heater 4, accommodating the temperature detecting unit, is attached to the heater mounting surface of a vessel 3 and the temperature detecting wire 8 is attached to the opposite surface of the vessel. The temperature detecting wire 8 is conducted to the heater 4 as a detecting signal source during a time from the starting of heating to the detection of melting point of the latent heat accumulating agent through the temperature detecting wire 8, however, the detecting signal source is switched to the temperature detecting unit accommodated in the heater 4 after the melting point of the agent is detected, and a controller 10 to control the heater 4 is provided. According to this constitution, the latent heat accumulating agent can be molten in a short period of time by a continuous conduction from the starting of heating of the agent to the time when the opposite surface arrives at the melting point, while generation of overcooling may be prevented even if the temperature of the latent heat accumulating agent is risen by controlling it by the detecting unit to a temperature lower than the heat resistive temperature of an overcool preventing agent after the temperature of the accumulativing agent has arrived at the melting point.

Description

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

Structure of the conventional example and its problems As shown in FIG. 1, this kind of conventional heat storage device has a heater 4 having a built-in temperature detection section in a container 3 containing a latent heat storage material 1 and a supercooling prevention material 2. This heater 4
A controller 5 was provided to control energization of the heater 4 based on a temperature detection signal from a temperature detection section built into the heater. 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 a 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 to a temperature lower than the allowable temperature of the supercooling preventive material 2 mixed in the latent heat storage material 1, supercooling that would cause the supercooling preventive material 2 to lose its function will not occur. Because the temperature detection unit built into the heater 4 detects the temperature of the heater 4 itself, it begins to turn on and off even before the humidity of the latent heat storage material 1 reaches its melting point, which lengthens the time it takes to complete heat storage. had a problem. In addition, since the temperature of the heater 4 is controlled,
There was a problem in that it was not reliable to detect whether or not the latent heat storage material 1 in the portion away from the heater 4 was melted.

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

In this configuration, the temperature detection wire 8 is attached to the opposite side of the heater 7, so that if the detection wire 8 detects the melting point of the latent heat storage material 1, the temperature detection wire 8 detects the melting point of the latent heat storage material 1 in the container 2. are all melted, and compared to a configuration in which the temperature of the heater 7 is detected, melting of the latent heat storage material 1 is more reliable. However, when a part of the container 3 is covered with a heat insulating material 6 such as a cushion, the amount of heat dissipated in that part decreases and the temperature tends to rise compared to other uncovered parts. Since the heat resistance temperature of the supercooling preventive material 2 mixed in the latent heat storage material 1 is exceeded, the supercooling preventive material 2 loses its function, and after melting, the latent heat storage material 1 stops energizing the heater 7 and starts dissipating heat. However, there was also the problem of supercooling, where latent heat could not be released at the freezing point.

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 function of the supercooling prevention material is reduced. disappears and supercooling occurs during heat dissipation, l! In addition, when heating a latent heat sensitive material with a heater, it prevents the heater from starting to turn on and off before the latent heat storage material reaches its melting point. The purpose is to melt.

Structure of the Invention In order to achieve this objective, the present invention houses a heater with a built-in detection part in a container, houses a temperature detection wire on the opposite side of the heater, and connects the heater to the heater. From the start of energization,
The temperature detection wire is used as the detection signal source 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 installed to control the heater temperature using the detection section built into the heater. It is something that

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. After the melting point is reached, a part of the container is heated by controlling the heater temperature to below the extreme temperature of the supercooling prevention material using the sensor built into the heater. Covered with a heat insulating material, even if the latent heat storage material rises in temperature, it will not exceed the heat resistance temperature of the supercooling prevention material, thereby preventing the occurrence of supercooling.

Description of examples Hereinafter, one embodiment of the present invention will be described using FIG. 3.

In FIG. 3, the same members as those in FIGS. 1 and 2 are given the same numbers.

In FIG. 3, a heater 4 having a built-in temperature detection section is mounted on the heater mounting surface of the container 3, and a temperature detection line 8 is mounted on the opposite surface of the container.

Further, 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, and after the temperature detection line 8 detects the melting point. , a controller 1O is provided which switches the temperature detection section built into the heater 4 as a detection signal source and controls the heater 4'f.

In the above configuration, when melting the latent heat storage material 1, the controller 1O 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, it means that all the latent heat storage material 1 in the container 3 has been melted,
Moreover, since the heater 4 is energized continuously, heat storage can be completed in a short time.Moreover, even if a part of the container 3 is covered with the heat insulating material 6, the heater 40 control temperature can be changed to the supercooling prevention material 2.
By setting the temperature of the latent heat storage material 1 to be below the heat resistance temperature of the supercooling protection phase 2, the temperature of the latent heat storage material 1 can be suppressed to be below the heat resistance temperature of the supercooling protection phase 2, and the occurrence of supercooling 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 wire is used as the temperature detection signal source, and after that, the temperature detection section built into the heater is used, and a controller is installed to keep the temperature constant. Since the other side of the container reaches the melting point of the latent heat storage material and all the latent heat storage material is melted, turn on and off.
The heater can be energized continuously without being turned off, 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 17il-I thermal temperature of the supercooling prevention material, so even if a part of the container is covered with heat insulating material, the latent heat storage material remains The temperature will 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. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure, 2nd cause No. 31! 1 Procedural amendment I18 July 11, 1980, 1984, Patent Application No. 236613 2 Name of the invention Thermal storage device 3 Relationship with the person making the amendment 41 cases Patent Applicant Address: 1006 Kadoma, Kadoma City, Osaka Prefecture Name (
582) Matsushita Electric Industrial Co., Ltd. Representative Toshihiko Yamashita 4 Agent 571 Address Address: 1006 Kadoma, Kadoma City, Osaka Prefecture, Matsushita Electric Industrial Co., Ltd. 2. Scope of Claims A container for storing a latent heat storage material, a heater attached to the heater mounting surface of the container WS and having a built-in temperature detection sound μ, and a container attached to the opposite surface of the container to detect the temperature of the container WS. The temperature detection line to be detected and the temperature detection line are used as a temperature detection signal source when heating to the latent heat storage material is started, and when this temperature detection line detects the melting point of the latent heat storage material, from then on, the temperature detection line is used as a temperature detection signal source. A heat storage device comprising a built-in temperature sensor as a temperature detection signal source and an air control for controlling the front heater to a temperature lower than the heat resistance temperature of the air heat storage material.

Claims (1)

[Claims] ii a heat storage material, a supercooling preventive material mixed into the latent heat storage material, a container for storing the supercooling preventive material and the latent heat storage material, and a temperature detecting section attached to the heater 4 of the container itself; A built-in heater, a temperature detection wire attached to the reflective surface of the container to detect the container temperature, and a temperature detection wire that is used as a temperature detection signal source when heating the latent heat storage material is started; 11. When detecting the zero melting point of the latent heat storage material, the controller controls the heater to a temperature lower than the heat resistance temperature of the supercooling prevention material by using the humidity detection section built in the heater as a temperature detection signal source. A heat storage device consisting of.