JPS6187596A - heat storage device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat storage device that uses a heat storage material to suppress a drop in temperature.

Conventional configurations and their problems In recent years, there has been a desire for the development of heat storage devices that can be applied to various home appliances such as irons and warming trays, which can be disconnected from the power source during use to improve operability.

2-・- Since home appliances such as irons and other heat-retaining appliances are normally used at temperatures below 200°C and use a large amount of heat, we have investigated the following as heat storage materials for these home appliances: Pentaerythritol/l/ in terms of heat storage amount, heat storage temperature, etc.
It was found that the one containing (Rentaerythritol) as the main material is most suitable. This heat storage material is 180
Since the crystal transition occurs around ℃, the latent heat of the transition can be used to store heat in the solid state. Therefore, it is possible to make the storage chamber for the heat storage material almost open, but since the melting point of the heat storage material is around 230 to 260°C, and there is a slight temperature difference between the melting point and the crystal transition temperature, A slight malfunction of the temperature controller may cause the set temperature in the storage chamber to exceed the melting point of the heat storage material. For this reason, it is desirable that the storage chamber for the heat storage material be a closed system so that even if the heat storage material melts, it will not leak outside.

An example in which the above-described heat storage device is applied to an iron will be described below with reference to the drawings.

In Figure 3, 1 is 3 pages for aluminum die casting.

A storage chamber 3 for accommodating a heat storage material 2 and a vaporization chamber 4 located approximately in the center of the storage chamber 3 are formed on the upper surface of the base 1. Heat transfer fins 5 are provided in the storage chamber 3 to improve heat conduction between the heat storage material 2 and the base 1. A storage chamber lid 6 is fixed to the upper surface of the base 1 with screws 7, and a heat-resistant sealant 8 is applied between the base 1 and the storage chamber lid 6 to seal the storage chamber 3 and the vaporization chamber 4. It's sealed. In fact, a heater 9 for heating the base 1 and the heat storage material 2 is buried in the base 1. Water 11 for steam generation is stored in the tank 10, and when the steam button 12 is operated, the operating shaft 13 is moved up and down to open and close the water supply hole 14, so that water drips into the vaporization chamber 4. Steam generated in the vaporization chamber 4 is ejected from the ejection hole 15 communicating with the vaporization chamber 4 to the bottom surface of the base 1. Further, the temperature control lever 16 is connected to a temperature control device (not shown), so that the temperature of the base 1 can be controlled. The heater 9 is electrically connected to the power supply terminal 17 via the temperature regulator υ, and when heating the heater 0, a power supply is connected to the power supply terminal 1T to supply power. 18 is a cover that covers the base 1 from above, and a handle 19 is provided on the top of this cover.
is installed.

The operation of the iron configured as above will be explained below.

First, connect the power supply to the power supply terminal 1, and then
6 to the steam scale and the power is turned on, the base 1 is heated to a set temperature by the heater 9, and that temperature is maintained by the temperature controller. At this time, the storage chamber 3 and the heat transfer fins 5 are also heated, so the entire heat storage material 2 reaches a transition point, and the heat storage material 2 becomes a solid '! , stores internal energy inside the trench.

Next, when ironing is performed, the power cord is removed from the power supply terminal 17 and used without the power cord. That is, since the temperature drop of the base 1 is suppressed by heat release from the heat storage material 2, ironing can be done without a power source and there is no need to worry about a power cord. In order to generate steam, the water 11 in the 5-peno tank 10 may be dripped into the vaporization chamber 4 by operating the steam button 12. In this case as well, the heat storage material 2 suppresses the temperature drop in the vaporization chamber 4, so that a sufficient amount of steam can be obtained.

Under normal conditions as described above, the heat storage material 2 remains solid, and even if the temperature controller malfunctions and the heat storage material 2 melts, the storage chamber 3 is sealed, so no leakage will occur to the outside. There is nothing to do and it is safe.

However, if the temperature controller does not operate at all, the heat storage material 2 will continue to be heated, the heat storage material 2 will change from solid to liquid, and from liquid to gas, and the internal pressure of the sealed storage chamber 3 will continue to rise. , there was a problem that the storage chamber 3 was at risk of exploding.

Furthermore, since the temperature regulator did not work, the iron was rapidly energized, posing a risk of fire.

OBJECTS OF THE INVENTION In view of the above points, the present invention provides a heat storage device that causes no safety problems even if the heat storage material melts and further evaporates, is inexpensive, and has excellent mass productivity.

Structure of the Invention 6C2 In order to achieve this object, the heat storage device of the present invention consists of a heat storage material that stores heat by heating, a heater that heats the heat storage material, and a storage chamber that accommodates the heat storage material. The heat storage material is sealed, a pressure release valve is installed in the storage chamber, and a temperature fuse electrically connected to the heater is installed close to the pressure release valve. Even if an abnormal condition occurs, such as when the heat storage material is energized and the heat storage material vaporizes, increasing the internal pressure of the storage chamber, the pressure release valve will operate and prevent an explosion in the storage chamber.
Furthermore, since the high-temperature heat storage material discharged from the pressure release valve comes into contact with the temperature fuse, the temperature fuse is immediately cut off, cutting off power to the heater and preventing disasters such as fire.

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

1 is a base made of aluminum die-casting, 7 is a heat storage material mainly made of pentaerythritol, 3 is a storage chamber, 4 is a vaporization chamber, 5 is a heat transfer fin, γ is a screw, 8 is a heat resistance Seal material, 9 is a heater, 10 is a tank, 11 is water, 12 is a steam button, 13 is an operating shaft, 14 is a water supply hole, 15 is a spout hole, 16 is a temperature control lever, 17 is a power supply terminal, 18 is a cover, Reference numeral 19 denotes a pusher, which is the same as the component of the iron to which the conventional heat storage device is applied as shown in FIG. 1, and the explanation thereof will be omitted.

Reference numeral 20 denotes a storage chamber lid made of processed aluminum plate, which seals the storage chamber 3 and the vaporization chamber 4. As shown in the sectional view of the main part at the lower rear of the iron in FIG. 2, the storage chamber lid 20 has a thin wall. This thin wall portion is used as the pressure release valve 20 in the embodiment of the present invention. Although the pressure relief valve in the thin wall portion has a simple structure and is convenient, the pressure relief valve may have a structure other than this. A temperature fuse 22 is installed at the top of the pressure release valve 21, and the temperature fuse 22 has a power supply terminal at one end, and a power supply terminal at one end.
A heater 9 is connected to the other end of 7, and another terminal of the heater 9 is electrically connected to a power supply terminal 17 via a temperature controller (not shown). The broken pressure relief valve 21 and temperature fuse 22 are covered by a safety wall 23.

The operation of the iron configured as above will be explained below.

First, connect the power supply to the power supply terminal 17, and then
6 to the steam scale and the power is turned on, the base 1 is heated to a set temperature by the heater 9, and that temperature is maintained by a temperature controller (not shown). At this time, the storage chamber 3 and the heat transfer fins 5 are also heated, so the entire heat storage material 2 reaches a transition point, and the heat storage material 2 becomes solid ``!,''! , stores energy internally.

Next, when ironing is to be performed, the power supply is removed from the power supply terminal 17 and the product is used without a power cord. That is, since the temperature drop of the base 1 is suppressed by heat release from the heat storage material 2, ironing can be done without a power source and there is no need to worry about a power cord. Further, when generating steam, the steam button 12 may be operated to cause water to drip into the vaporization chamber 4. In this case as well, the heat storage material 2 suppresses the temperature drop in the vaporization chamber 9, making it possible to obtain a sufficient amount of steam.

As described above, the normal operation during ironing in this embodiment is exactly the same as that in the conventional example.

During normal use, the temperature of the base 1 is set to about 200° C. or less by the temperature controller, so the heat storage material 2 is solid. Even if the temperature controller malfunctions and the set temperature in the storage chamber 3 is high enough to cause the oak heat storage material 2 to melt,
A heat-resistant sealant 8 is applied between the base 1 and the storage chamber lid 20, and the storage chamber lid 2o is fixed to the base 1 with screws 7 to completely seal the storage chamber 3, so that the heat storage material 2 It does not leak out of the storage chamber 3, and the spaces between the storage chambers are not kept completely airtight, allowing free ventilation.

In addition, if the temperature controller does not operate at all because the storage chamber 3 is completely sealed, the heat storage material 2 will continue to be heated, and the heat storage material 2 will change from solid to liquid and from liquid to gas, and will be sealed. The internal pressure of the storage chamber 3 continues to rise and there is a possibility that the storage chamber 3 will explode. In the event of an abnormality, this pressure release valve 21 is activated (in the embodiment, it ruptures), and an explosion in the storage chamber 3 is prevented. Furthermore, when the pressure release valve 21 acts, the high temperature heat storage material 2 is discharged, but since the temperature fuse 22 is installed above the pressure release valve 21, the discharged high temperature heat storage material 2 is discharged from the temperature fuse 22. come into contact with.

In this case, the temperature fuse 22 is immediately blown and the heater 9
Turn off electricity to prevent disasters such as fire.

Furthermore, if the discharged high-temperature heat storage material 2 leaks directly to the outside of the main body, there is a possibility of causing burns to the user, so the pressure release valve 21 and temperature fuse 22 are covered with a safety wall 23 to prevent the heat storage material from leaking to the outside. This temporarily stops the leak.

As described above, according to this embodiment, the sealed storage chamber 3
A pressure release valve 21 is provided on the outer wall of the pressure release valve 2.
By providing the temperature fuse 22 close to the temperature fuse 1, the storage chamber 3 will not explode even in the event of an abnormality, and disasters such as fire can also be prevented.

Effects of the Invention As described above, the heat storage device of the present invention provides a pressure release valve in the sealed storage chamber that houses the heat storage material, and further releases the temperature fuse electrically connected to the heater that heats the heat storage material into a pressure release valve. By installing it close to the release valve, the set temperature of the heat storage material shifts to the high temperature side, and to the extent that the heat storage material melts,
Heat storage material often leaks from the storage room, and when an abnormal condition occurs such as the melted heat storage material continues to be further heated by the heater, the heat storage material evaporates, and increases the internal pressure of the storage room. The pressure relief valve will be activated to prevent an explosion in the storage chamber. At this time, the high-temperature heat storage material discharged from the pressure release valve comes into contact with the temperature fuse, so the temperature fuse is immediately cut off, stopping power supply to the heater, thereby increasing the risk of fires and other disasters.

As described above, the present invention has a configuration that combines a pressure release valve and a temperature fuse, and this configuration allows the high temperature heat storage material to be directly connected to the temperature fuse, compared to general measures against abnormal overheating that are configured with a single temperature fuse. Because of the contact, the response of the temperature fuse is very good.Furthermore, even if the temperature of the heat storage material is around the normal state (200°C), if the internal pressure of the storage chamber becomes abnormally high for some reason, the pressure will be reduced. Since the release valve operates and the temperature fuse is cut off as described above, the temperature fuse can also be used as a backup fuse for abnormally high pressure, providing excellent safety.

As described above, the heat storage device of the present invention has very high safety.
However, since the structure is simple, it can be manufactured at low cost and has excellent mass productivity, and its effects are significant.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an iron to which a heat storage device according to an embodiment of the present invention is applied, FIG. 2 is a sectional view of a main part, and FIG. 3 is a sectional view of an iron to which a conventional heat storage device is applied. 2... Heat storage material, 3... Storage room, 9...
・Heater, 21...Pressure release valve, 22...
...Temperature fuse, 23...Safety wall.

Claims (2)

[Claims] (1) Consisting of a heat storage material that stores heat by heating, a heater that heats the heat storage material, and a storage chamber that houses the heat storage material, the storage chamber is sealed with the heat storage material, and the storage chamber is provided with a pressure release valve.
A heat storage device in which a thermal fuse electrically connected to a heater is installed close to a pressure relief valve. (2) The heat storage device according to claim 1, wherein the pressure release valve and the thermal fuse are covered by a safety wall.