JP2001091175A - Latent heat storage body heatable with microwave - Google Patents

Abstract

PROBLEM TO BE SOLVED: To heat the entire latent heat storage body uniformly while preventing leakage of a latent heat storing material. SOLUTION: The latent heat storage body 1 heatable with microwave comprises a latent heat storing material 2 encapsulated in a container 3 having a low dielectric loss coefficient.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave heatable latent heat storage element capable of uniformly heating and storing heat with microwaves.

[0002]

2. Description of the Related Art Conventionally, when a latent heat storage material itself or a latent heat storage material including the same is heated by a microwave to store heat, there are the following problems. Due to the nature of microwaves, those having a low dielectric loss coefficient are easy to transmit, and those having a high dielectric loss coefficient are easily absorbed. In other words, in the latent heat storage material, the liquid state has a higher dielectric loss coefficient than the solid state, so if the melting starts partially in the heating step using microwaves, the microwaves are concentrated and absorbed there, The part is further heated and the temperature difference with the remaining solid part tends to be very large. In particular, if the latent heat storage material utilizes a phase change of a hydrate, this tendency becomes more remarkable, and when the temperature of the entire latent heat storage body is to be increased with uneven heating, the liquid portion is An abnormal heating state occurs, and in this case, the container itself may be damaged or may be deteriorated due to a partial abnormal temperature rise of the latent heat storage element itself.

Further, a trigger element for enclosing a latent heat storage material which is apt to be supercooled, such as an inorganic hydrate, and simultaneously releases a supercooled state (a state in which crystals are completely melted) of the latent heat storage material is provided. The latent heat storage element is installed to constitute a latent heat storage element, and after heating this latent heat storage element to a supercooled state, the latent element is released by a trigger element to generate heat. This is a necessary condition for reaching a supercooled state. Therefore, in the case where there is uneven heating due to the above-mentioned microwave heating, if the whole is to be completely melted, the temperature will be extremely high in part, possibly causing damage to the container.

[0004] As another problem, when the latent heat storage material is damaged due to uneven heating due to microwave heating of the latent heat storage material or a user's misuse, the internal latent heat storage material leaks to the outside and damages or contaminates peripheral devices. -There was a risk of odor.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and aims to prevent abnormal temperature rise caused by partial heating unevenness due to microwave heating and to uniformly heat the whole. In addition, microwaves can prevent the internal latent heat storage material from leaking to the outside even if the latent heat storage material is damaged due to misuse during heating (for example, forgetting to heat and leave it for a long time). An object is to provide a regenerative heater.

[0006]

According to the first aspect of the present invention, there is provided a latent heat storage element which can be heated by a microphone mouth wave and has a low dielectric loss coefficient. It is characterized in that the latent heat storage material 2 is sealed therein. With this configuration, the microphone mouth wave can easily pass through the container 3 made of a material having a low dielectric loss coefficient, and the latent heat storage material 2 Heating can be performed efficiently, and even if the latent heat storage element 1 is damaged due to misuse during heating (for example, forgetting to heat and leave it for a long time), the internal latent heat storage material 2 Can be prevented from leaking to the outside.

According to a second aspect of the present invention, in the first aspect, the release means 4 for arbitrarily releasing the supercooled state of the latent heat storage material 2 from a supercooled state of the latent heat storage material 2 by heating. In this case, since the latent heat storage material 2 can be completely supercooled by the complete melting of the entire latent heat storage material 2, the problem of abnormal temperature rise due to uneven heating does not occur. By releasing the supercooled state, heat generation unevenness can be eliminated.

According to a third aspect of the present invention, in the first aspect, it is preferable that the container 3 is formed of a multi-layered container made of a flexible material, a hard material, or a combination thereof. In this case, it is possible to prevent deformation and breakage of the container 3 due to expansion of the air in the container according to the application.

According to a fourth aspect of the present invention, in the third aspect, the multi-layered container comprises an inner container 6 containing the latent heat storage material 2, an outer container 5 containing the inner container 6, and an inner container 6. Liquid reservoir 7 installed between outer containers 5 to prevent leakage of latent heat storage material 2 in inner container 6 to the outside.
In this case, it is possible to prevent the latent heat storage material 2 from leaking to the outside in the liquid reservoir 7 even if the inner container 6 is broken due to excessive heating.

[0010] The invention according to claim 5 provides the invention according to claims 1-4.
In any of the above, it is preferable to provide a decompression means 8 for preventing the inside of the container 3 from becoming high pressure when the latent heat storage element 1 is heated by the microphone mouth wave. This is effective for preventing damage to the container 3 during heating.

According to a sixth aspect of the present invention, in the fifth aspect, it is preferable that the whole or a part of the container 3 is made of a material that allows only gas and not liquid, and in this case, the internal latent heat storage material 2 is used. Can be reduced without leaking to the outside.

According to a seventh aspect of the present invention, in the fifth aspect, it is preferable that a part of the container 3 is constituted by a combination of a pressure reducing valve and a material that allows only gas without passing through liquid,
In this case, the pressure can be reduced more reliably without the internal latent heat storage material 2 leaking out.

The invention according to claim 8 provides the invention according to claims 1-7.
In any one of the above, when the latent heat storage material 1 is heated by the microphone mouth wave, it is preferable that the temperature difference in the thickness direction of the latent heat storage material 2 is reduced. The temperature difference between the temperature and the lower temperature can be reduced.

According to a ninth aspect of the present invention, in the first or second or eighth aspect, the latent heat storage material 2 comprises a main heat storage material 10 and a heat storage auxiliary material having a latent heat of fusion between a melting point and a boiling point of the main heat storage material 10. It is preferable to be constituted by the material 11 and in this case,
By the heat storage sub-material 11, the temperature rising speed of the latent heat storage body 1 can be suppressed.

According to a tenth aspect of the present invention, in the ninth aspect, it is preferable that the density of the heat storage main material 10 is higher than the density of the heat storage auxiliary material 11, and in this case, the heat storage main material 10 and the heat storage auxiliary material 11 are combined. When mixed and sealed, the heat storage sub-material 11 having a low density automatically moves toward the upper part as the heat-melting state is approached, and a rapid rise in the temperature of the heat storage main material 10 can be suppressed.

According to the eleventh aspect of the present invention, in the first, second or eighth aspect, it is preferable to mix a stirrer 9 having high thermal conductivity inside the latent heat storage material 2. In this case, heating by a microphone mouth wave is performed. At times, the stirrer 9 acts as a soaking material, and the material temperature can be made uniform.

The invention according to claim 12 is the first invention.
11, in heating the latent heat storage medium 1 by the microphone heat wave, the microphone heat wave is concentrated on the lower portion of the latent heat heat storage material 1, and the entire heat is heated by convection from the lower part to the upper part of the latent heat storage material 2. The microphone mouth wave concentrating means 12 is preferably provided. In this case, the whole can be efficiently melted by convection.

The invention according to claim 13 is the first invention.
12, when heating the latent heat storage element 1 by microwaves, it is preferable that a microwave shield 13 is provided on the upper part of the latent heat storage element 1.
By increasing the irradiation amount of the latent heat storage element 1 from the lower direction, the lower portion of the latent heat storage material 2 can be melted first, and the entire uniform heating by convection can be performed.

The invention according to claim 14 is the invention according to claim 12.
In heating the latent heat storage element 1 by microwaves, the latent heat storage element 1 is preferably composed of an upper latent heat storage material layer 14 and a lower water layer 15; in this case,
By heating the water layer 15, the crystals existing under the latent heat storage material 2 can be efficiently heated and melted from below.

The invention according to claim 15 is the invention according to claim 12.
In the above, the microphone mouth wave concentrating means 12 has a parabolic shape for concentrating the microwaves in the lower part of the latent heat storage 1 under the latent heat storage 1 when the latent heat storage 1 is heated by the microwave. In this case, it is possible to heat and melt the crystal present below the latent heat storage material 2 from below.

The invention according to claim 16 is the invention according to claim 12.
In any one of (a) to (d), when the latent heat storage element 1 is heated by the microwave, the heat insulating material 1
6 is preferably provided, and in this case, the heat insulating material 16 is provided.
As a result, heat from the lower direction of the latent heat storage element 1 can be stored inside without being lost again.

The seventeenth aspect of the present invention is the first aspect of the present invention.
In any one of (16) and (14), it is preferable that the shape of the latent heat storage element 1 is such that microwave irradiation energy can be concentrated on each location of the latent heat storage element 1 when the latent heat storage element 1 is heated by the microwave. In this case, By devising the shape of each part according to the ease of concentration of the microwave, partial heating unevenness can be prevented.

[0023] The invention of claim 18 provides the invention of claim 17.
In heating the latent heat storage element 1 with microwaves, it is preferable that the thickness D at the end of the latent heat storage element 1 be larger than the thickness d at the center, and in this case, the concentration of the microwaves is easy. However, a large amount of the latent heat storage material 2 is present, and uniform heating can be achieved as a whole.

According to the nineteenth aspect of the present invention,
In heating the latent heat storage element 1 by microwaves, the shape of the latent heat storage element 1 is preferably circular or polygonal, such as hexagonal or more. In this case, the concentration of microphone mouth waves can be reduced.

The invention according to claim 20 provides the invention according to claim 11
To 19, it is preferable to provide at least one of judgment means 17 for prevention of excessive temperature rise, completion of heat storage, release of supercooling, and remaining heat storage. In this case, latent heat by microwave It is possible to prevent overheating of the heat storage body 1 or display whether the heat storage is really finished, whether the temperature has reached a temperature at which the subcooling can be released, or how much heat storage is left.

The invention according to claim 21 is based on claim 20.
In the above, the judgment display means 17 is preferably a temperature indicating tape indicating a temperature change. In this case, the temperature indicating tape is affixed to the surface of the latent heat storage element 1 to complete the heat storage of the latent heat storage material 2, to allow supercooling release, and to store heat. You can check the remaining amount at a glance.

[0027] The invention according to claim 22 provides the invention according to claims 3 to
In any one of 21, it is preferable to provide a pressure sensor 18 and an alarm 19 for preventing excessive temperature rise between the inner vessel 6 and the outer vessel 5, in which case abnormal temperature rise can be detected by sound. The heating can be stopped before the container 3 is damaged.

The invention according to claim 23 is the invention according to claims 1 to
7, the inner container 6 made of a flexible material.
It is preferable to press the seal portion 6 with a rib 20 protruding from the outer container 5. In this case, the strength of the seal portion 6 is increased, and the time until the inner container 6 is broken can be extended.

The invention according to claim 24 is the invention according to claim 23.
In this case, it is preferable that the rib 20 is formed of a flexible reinforcing material. In this case, the shape of the inner container 6 made of a flexible material can be stably maintained against the pressure from the rib 20.

According to a twenty-fifth aspect of the present invention, in the second aspect, the triggering element 21 in which the release means 4 for releasing the supercooled state of the latent heat storage material 2 is provided inside the container, and the trigger element is provided from outside the container. An operation unit 25 for operating the element 21. The trigger element 21 is provided with a trigger material 22.
Embrio of a latent heat storage material is adhered to the surface of the material, and the embryo is aggregated by the deformation of the trigger material 22 by the operation unit 25 to form a crystal nucleus, and this crystallization propagates to the entire latent heat storage material 2 so that the latent heat storage material 2 is preferably configured to release the supercooled state and generate heat. In this case, uniform heating of the latent heat storage material 1 by the microphone mouth wave eliminates uneven heating of the latent heat storage material 2, so that the latent heat storage material 2 is heated. It becomes easy to make the whole material 2 into a supercooled state uniformly.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments shown in the accompanying drawings.

As shown in FIG. 1, a latent heat storage element 1 capable of being heated by a microwave according to the present embodiment includes a container 3 having a low dielectric loss coefficient and a latent heat storage material 2 sealed in the container 3. Is composed of the subject. By using a container having a low dielectric loss coefficient as the container 3, the whole is uniformly heated in the microwave heating stage. In this example, the container 3 of the latent heat storage element 1 is formed of a flexible material, a hard material, or a multi-layer container made of a combination thereof. Here, it is preferable that the combination can be freely selected according to the use as shown in FIGS. 1 shows a case where the outer container 5 is a hard material and the inner container 6 is a flexible material, FIG. 2 shows a case where both the outer container 5 and the inner container 6 are hard materials, and FIG. 4 shows a case where the outer container 5 is made of a flexible material, and FIG. 4 shows a case where the inner container 6 is made of a hard material.

Further, it is necessary that the inner latent heat storage material 2 does not leak to the outside due to breakage of the inner container 6 at the time of heating by the microwave, so that the outer container 5 is made flexible. Alternatively, it is desirable that the outer container 5 is not completely sealed. In this case, the outer container 5 can be prevented from being deformed or damaged due to expansion of air between the outer container 5 and the inner container 6. Become.

Here, as the material constituting the container 3 having a low dielectric loss coefficient, for example, polyethylene, polypropylene or the like is preferable. If the thickness of the container 3 is 3 mm or less, PVC, HIPS, PC, TPX, PET, or the like may be used. Further, a laminated film or the like can be used as the flexible material.

However, by using a material having a low dielectric loss coefficient as the material of the container 3 of the latent heat storage element 1, microwaves can easily pass through the container 3 and the latent heat storage material 2 can be efficiently heated. . Therefore, it is possible to prevent the abnormal temperature rise caused by the partial heating unevenness due to the microwave heating, to provide the latent heat storage body 1 capable of uniformly heating the entirety, and it is difficult to heat the container 3 itself. I can do it. Further, since the latent heat storage material 2 has a structure that does not leak to the outside of the container 3, that is, the latent heat storage material 2
Of the latent heat storage element 1 due to an erroneous use during heating (for example, forgetting to keep the apparatus heated and leaving it for a long time) when the container 3 enclosing the container 3 has a double structure of the inner container 6 and the outer container 5. Even when it occurs, the internal latent heat storage material 2 can be prevented from leaking to the outside, and as a result, the risk of damage, contamination, and odor of peripheral devices can be eliminated.

Next, as the latent heat storage material 2 sealed in the container 3, for example, after cooling by heating the microphone mouth wave, it is relatively stable and in a supercooled state (a state in which the crystal is completely melted). Materials are used. An inorganic hydrate can be mentioned as a material that can reach a supercooled state relatively stably. Specifically, barium hydroxide octahydrate, sodium acetate trihydrate, sodium thiosulfate pentahydrate, sodium hydrogen phosphate dodecahydrate, sodium sulfate decahydrate, calcium chloride hexahydrate Is mentioned. When a hydrate is used as the latent heat storage material 2, polyethylene, polypropylene or PET having very low water vapor transmission rate and oxygen transmission rate is effective, and in a laminated film, the effect is further improved by using vapor-deposited PET. . However, evaporation PE
Since T is easily cracked by external stress, its performance can be maintained for a long period of time by increasing the thickness, overlapping, and protecting with other materials.

In the case where the latent heat storage material 2 is a substance which relatively stably reaches a supercooled state after heating and cooling (crystals are completely melted) as described above, the supercooled state is not changed. Release means 4 for arbitrarily releasing is provided.

The structure of the release means 4 is not particularly limited.
As shown in FIG. 7, a method of adhering and aggregating the latent heat storage material embrio (aggregated into crystal nuclei) between the trigger materials 22 is particularly effective. For example, as shown in FIG.
Embryos of the latent heat storage material are attached to both surfaces of the trigger material 22 having flexibility, and washers 23 are respectively arranged on both surfaces of the trigger material 22.
4 and the both ends of the trigger material 22 are
(A) As shown in (b), the trigger element 21 is formed so as to extend upward in the trigger frame 29 so as to protrude. At this time, more embryos of the latent heat storage material are attached to the gap between the trigger material 22 and the washer 23. Then, the trigger element 21 is installed inside the inner container 6, and the operation unit 25 is installed in a part of the outer container 5 so that the trigger element 21 can be operated from the outside of the outer container 5. When the operating portion 25 is pushed in, the central portion of the trigger element 21 bends downward to cause friction between the trigger material 22 and the washer 23, and the latent heat storage material embryo attached thereto is aggregated to form a crystal nucleus. As the crystallization propagates to the entire latent heat storage material 2, the supercooled state of the latent heat storage material 2 is released and heat is generated.

In the embodiment shown in FIGS. 6A and 6B, the trigger element 21 is set in such a manner that the center of the trigger element 21 is curved so as to be convex upward. By reversing in the direction indicated by the arrow m, a large movement stroke can be secured, but this is not necessarily the case. For example, as shown in FIG. May be deflected downward.

Further, as shown in FIG. 6, if the trigger element 21 is installed in the inner container 6 in a state where it is not fixed, the force applied to the outer container 5 is not easily transmitted to the trigger element 21 and the operation cannot be performed. There is a problem that. Therefore, as shown in FIG.
It is preferable to fix with a convex portion 26 protruding from the upper and lower surfaces of the hologram. In this case, the operating point of the trigger element 21 is always set at a stable position with respect to the external operating pressure, and the stroke and the pressure are constant so that the trigger element 21 is not destroyed even in repeated operations. That is, when pressure is applied to the operation unit 25 of the outer container 5, the force is transmitted linearly from the operation unit 25 to the trigger element 21 via the pressing unit 25a, so that the operation of the trigger element 21 can be stabilized.

Next, as a means for preventing the latent heat storage material 2 from leaking to the outside during heating by the microphone mouth wave, as shown in FIG. 8, the latent heat storage material 2 in the inner container 6 leaks to the outside. It is preferable to install a liquid reservoir 7 for preventing the occurrence of the pressure between the inner container 6 and the outer container 5. In particular, in the latent heat storage element 1 composed of a multi-layered container, when the inner container 6 is made of a flexible material, there is a possibility that the inner container 6 may be damaged due to excessive heating. At this time, leakage to the outside can be prevented due to the presence of the liquid reservoir 7 in the periphery. Usually, the space of the liquid reservoir 7 plays a role of the heat insulating material 16, and there is also an advantage that the temperature is hardly increased even after heating, and it is easy to carry. Even when the inner container 6 is made of vapor-deposited PET or the like for preventing water vapor permeation, the outer container 5 can be protected by the liquid reservoir 7, so that the outer container 5 is hardly cracked, and the performance is long. It will be maintained for a period.

When the latent heat storage body 1 is heated by the microwave, it is preferable that the inside of the container 3 is not set to a high pressure as shown in FIGS. In the example shown in FIG. 9, an air reservoir 30 is provided inside the container 3,
By using a decompression valve 31 constituting the decompression means 8 in that portion, gas can be passed to the outside without causing leakage of liquid and decompression can be performed. Further, in the example shown in FIG. 10, a part (or the whole) of the container is constituted by the gas selective permeable film 32 which allows only gas without passing through liquid. Gore-Tex (trade name) is preferably used as the material of the gas selective permeable film 32. Since the Gore-Tex selectively transmits only air, the pressure can be reduced without leaking the latent heat storage material 2 to the outside. Further, as shown in FIG. 11, it is preferable that a part of the outer container 5 is constituted by a combination of a pressure reducing valve 31 and a gas selective permeable film 32. That is, since there is a possibility that the liquid may pass through only the pressure reducing valve 31, by using the gas selective permeable film 32 such as Gore-Tex under the pressure reducing valve 31, the internal latent heat storage material 2 does not leak out. The pressure can be reduced more effectively.

When the latent heat storage element 1 is heated,
It is preferable that the temperature difference in the thickness direction of the latent heat storage material 2 is reduced. As shown in FIG. 12, when heating by microwave A using microwave oven 33,
Microwaves A irradiate from the upper part in the microwave oven 33 occupy most of the products. Therefore, when heated from above, the temperature difference between the upper temperature and the lower temperature of the latent heat storage material 2 becomes large. Therefore, as shown in FIGS. 14 to 17 and the like below, the heat of the upper portion of the latent heat storage element 1 is transferred to the lower portion by heat transfer, or the temperature of the upper portion is hardly increased, so that the whole is uniform. It is preferable to be able to heat to a lower temperature.

FIG. 14 shows that the latent heat storage material 2 is
And a heat storage sub-material 11 having latent heat of fusion between the melting point and the boiling point of the heat storage main material 10.
When the main heat storage material 10 reaches the sensible heat region c beyond the latent heat regions a and b of the latent heat storage material 2 shown in FIG. Therefore, the heat storage sub-material 11 having a latent heat region in this temperature region (between the melting point and the boiling point) is simultaneously sealed to thereby form the sensible heat region c ′.
It takes a long time to reach, and the rate of temperature rise can be suppressed. Particularly, in the case of microwave heating, since the upper part is heated by microwave irradiation from the upper part, as a countermeasure to prevent this, the heat storage auxiliary material 11 is positioned on the heat storage main material 10 as shown in FIG. This is effective for the entire uniform heating.

FIG. 15 is a graph showing the relationship between the density of the heat storage main material 10 and the heat storage auxiliary material 1.
The case where the density is higher than 1 is shown. Main heat storage material 10
And the heat storage sub-material 11 is mixed and enclosed,
As the heat-melting state is approached, the heat storage sub-material 11 is automatically positioned at the upper part and the heat storage main material 10 is automatically positioned at the lower part due to the density difference between the two. At this time, the rising speed of the upper temperature decreases due to the latent heat of fusion of the heat storage auxiliary material 11. Therefore, the whole can be uniformly heated. As this combination, an inorganic hydrate whose viscosity is extremely reduced when it is melted into the heat storage main material 10 is used, and when the organic latent heat storage material 2 is used as the heat storage auxiliary material 11, the inorganic hydrate of the heat storage main material 10 is first used. And the resulting melt
As shown in (a) and (b), the organic heat storage sub-material 11 having a low density automatically moves toward the upper part, and serves to suppress a rapid rise in the temperature of the heat storage main material 10. Generally, the density of the inorganic hydrate is lower than that of the organic latent heat storage material 2, so that the organic is located at the upper part and the inorganic is located at the lower part. Also, by providing the density difference, there is also an advantage that it is less likely to be mixed with each other, so that it is resistant to repeated use for a long period of time.

FIG. 16 shows a case where a stirrer 9 having high thermal conductivity is mixed in the latent heat storage material 2. As the stirrer 9, for example, a lump such as ceramic or SUS is used.
By enclosing the stirrer 9 inside the latent heat storage material 2, the stirrer 9 itself having high thermal conductivity at the time of heating acts as a heat equalizing material, and at the time of carrying immediately after heating, the stirrer 9 is used.
The mass of ceramic or SUS that constitutes
Since the whole is stirred, there is also an advantage that the material temperature can be made uniform.

FIG. 17 shows the outer container 6 having a low dielectric loss coefficient.
When enclosing the latent heat storage material 2 therein, a horizontally long high heat conductive material 50 is installed on the upper portion of the latent heat storage material 2, and a vertically long highly conductive material 51 for transmitting the heat to the lower portion is provided. This shows a case where a plurality of units are installed. That is, FIG.
When only the latent heat storage material 2 is sealed in the outer container 6 having a low dielectric loss coefficient as shown in FIG.
With the configuration as shown in FIG. 17, the heat of the upper part of the latent heat storage material 2 can be transmitted to the lower part of the latent heat storage material 2 via the highly heat conductive materials 50 and 51, and the entire inside of the latent heat storage material 2 can be transferred. It becomes possible to heat uniformly.

FIG. 19 shows a case where the microphone mouth wave A is concentrated at the lower part of the latent heat storage element 1 and the whole of the latent heat storage material 2 is heated by convection from the lower part to the upper part.
Incidentally, in the case of micro heating using a microwave oven or the like, the microwaves A are concentrated on the latent heat storage element 1. The temperature difference between the latent heat storage material 2 melted from the upper portion and the lower portion is increased because the microwave A is more easily absorbed by the melted portion. By applying the microwave shield 13 to the upper part of the latent heat storage material 2 to prevent this, the irradiation amount from the lower direction can be increased and the lower latent heat storage material 2 can be melted first. As a result, as shown in FIG. 19B, so-called convection occurs in which the latent heat storage material 2A that has been heated and melted rises toward the upper part of the latent heat storage element 1 and the upper part of the latent heat storage material 2 descends. The whole can be melted efficiently.

FIGS. 20 and 21 show that when the latent heat storage element 1 is heated, a shield frame 13a or an aluminum sheet 13 is provided above the latent heat storage element 1 as a microwave shield 13.
The case where b was applied is shown. By applying the microwave shield 13 to the upper portion, the irradiation amount from the lower direction can be increased, and the lower latent heat storage material 2 can be melted first. The microwave shield 13 is provided above the latent heat storage 1.
As shown in FIG. 20, a shield frame 13a may be provided on the upper portion inside the outer container 5 as shown in FIG. 20, or an aluminum sheet 13b may be mounted on the upper surface of the inner container 6 as shown in FIG. When a flexible container is used, by using an aluminum laminated film on one side, it can be used as a container in which the microphone mouth wave shield 13 is integrated.

FIG. 22 shows a case where the latent heat storage element 1 is separated into an upper latent heat storage material layer 14 and a lower water layer 15 by using a separation film 60 when the latent heat storage element 1 is heated. I have. By positioning the container 3 containing water, in which microwaves are particularly likely to concentrate, at the lower portion of the latent heat storage material 2, the temperature of the water is raised first, so that the crystal present at the lower portion is heated and melted from below. In addition, as shown in FIG. 23, a water layer 15 may be sealed between the outer container 5 and the inner container 6, and in this case, uniform heating can be performed without using a separation film.

FIG. 24 shows a latent heat storage element 1 using microwaves A.
When heating the microwave, the microwave A
In this case, the microphone mouth-wave concentrating means 12 having a parabolic shape for concentrating the liquid crystal on the lower part of the latent heat storage element 1 is shown. By installing the parabolic microwave A integrator 40, the concentration of the microwave A in the lower part can be further improved. At this time, for example, as shown in FIG.
It is desirable to provide a heat insulating material 16 below the latent heat storage element 1. Since the heat insulating material 16 is provided below the latent heat storage element 1, heat from the lower direction can be stored inside without being lost again, so that uniform heating as a whole is promoted.

FIG. 26 shows a case where the latent heat storage element 1 is heated when the microwave irradiation energy is concentrated on each part of the latent heat storage element 1 during heating. By the way, in the case of microwave heating by a microwave oven, due to its characteristics, the central part in the refrigerator is weaker in electrolysis than the surroundings, and furthermore, due to the nature of microwaves, it is easy to concentrate locally on sharp edges.
Therefore, when the laminated inner container 6 having a shape like the portion surrounded by A in FIG. 26 is used, the portion A is preferentially heated, and partial heating unevenness occurs. Cheap. Therefore, if the shape of each part is devised as shown in FIGS. 27 to 29 described later in accordance with the degree of concentration of the microwaves, uniform heating can be achieved as a whole. This is the same in the embodiments shown in FIGS.

Further, in order to promote uniform heating, as shown in FIG. 27, when the latent heat storage element 1 is heated, the thickness D around the latent heat storage element 1 is increased, and the thickness d (<
It is preferable to make D) thin. Thus, the latent heat storage element 1
By bringing the volume of the central portion to the periphery, a large amount of the latent heat storage material 2 exists in a place where the microwaves are easily concentrated, so that the whole can be uniformly heated. At this time, FIG.
27 is provided on the lower surface of the inner container 6 and the inner container 6 is made of a flexible material, so that the shape of the latent heat storage element 1 shown in FIG. It is convenient because it can be easily made.

FIGS. 29 (b) and 29 (c) show the case where the shape of the latent heat storage element 1 is circular or a polygon of six or more when heating the latent heat storage element 1. FIG. Here, FIG.
When the shape of the latent heat storage body 1 is square as in FIG. 9A, the corners B are sharp, so that the microwaves are easily concentrated on the corners B. If the shape is made hexagonal or more as shown in FIG. 29B to prevent this, the concentration of microphone mouth waves can be reduced. Ideally, a round shape as shown in FIG.

Next, as shown in FIG. 30, a judgment display means 17 is provided to display at least one of the following: prevention of excessive temperature rise, completion of heat storage, release of supercooling, and remaining amount of heat storage. Is preferred. Here, a pressure sensor 18 and an alarm 19 are provided between the inner container 6 and the outer container 5 as an overheating prevention communication. Hard container 3 in outer container 5
When a flexible container 3 is used inside,
The inner container 6 undergoes volume expansion by heating and raising the temperature. At this time, by utilizing the fact that the space between the outside and the inside is compressed, an abnormal temperature rise can be sensed by sound by installing the pressure sensor 18 and the associated alarm 19 in that portion. Prevention of overheating during heating of the latent heat storage element 1 by microwaves, display of whether heat storage is really finished, whether it is at a temperature at which supercooling can be released, or how much remaining heat storage is left. Thereby, the heating can be stopped before the container 3 is damaged, and the usability as the latent heat storage material 2 is further improved.

As a judgment display method, the above-mentioned judgment display becomes possible by converting the energy of the energy into the one that appeals to the five senses, such as color, light, and sound, using the temperature, the internal pressure, and the like. As an example, the completion of heat storage of the latent heat storage material 2, the possibility of supercooling release, and the remaining heat storage amount may be confirmed by attaching a temperature indicating tape whose color changes depending on the temperature to the surface of the container 3 of the latent heat storage body 1.

In the latent heat storage element 1 having a multiplex structure as described above, as shown in FIG. 31, the inner container 6 made of a flexible material is formed by the ribs 20 projecting from the upper and lower surfaces of the outer container 5. The seal portion 6a may be crimped. When the flexible container 3 is used as the inner container 6, or when the container 3 is broken due to abnormal temperature rise, the sealing portion 6a is mainly broken first.
By pressing the sealing portion 6a of the inner container 6 with the ribs 20 projecting from the upper and lower surfaces of the outer container 5 to increase the strength of the sealing portion, the strength of the sealing portion 6a is increased, and the inner container 6 is broken. You can extend the time until. As shown in FIGS. 32 (a) to 32 (d), the ribs 20 protruding from the upper and lower surfaces of the outer container 5 may not be pressed against the inner container 6 made of a flexible material.
Further, as shown in FIG.
0 'may be used.

Here, the rib 20 (or the boss 20) is used.
As'), it is preferable to use a flexible reinforcing material, for example, rubber. By forming the rib 20 with a flexible reinforcing material such as rubber, in the example shown in FIG. 31, the inner container 6 made of a laminated film or the like can be sealed and pressure-bonded so as not to damage the inner container 6. The shape of the inner container 6 can be maintained more stably.

[0059]

The present invention will be described below in detail with reference to examples.
The present invention is not limited to the following embodiments.

[Examples 1 to 19 and Comparative Examples 1 to 3] In each of the following Examples 1 to 19, the heating state of the latent heat storage body 1 of the present invention by microwave heating was compared with Comparative Examples 1 to 3. The results are shown in Tables 1 and 2. In addition, heating,
The common condition for the case is that the latent heat storage material 2 capacity: 50
0 g, range output: 500 W.

In the first embodiment, as the outer container 5, FIG.
Has a cross-sectional shape shown in the figure, and has an inner dimension of 180 mm x 180 mm x
A 12-mm, 2-mm-thick PP hollow container was used, and a heat storage main material containing 100 parts by weight of sodium acetate trihydrate and 1 part by weight of sodium pyrophosphate pentahydrate was sealed therein.

In the second embodiment, the outer container 5 shown in FIG.
And a PP hollow container having an inner size of 180 × 20 mm and a wall thickness of 2 mm having the cross-sectional shape shown in FIG. As the inner container 6,
Fig. 29 shows a laminated bag made of φ180 circular seal.
(C) The laminated shape shown in (c) was used, and the same heat storage material as in Example 1 was sealed therein.

In the third embodiment, as the outer container 5,
Has the cross-sectional shape shown in the inside, 190 mm x 190 mm x
A PP hollow container having a thickness of 20 mm and a thickness of 2 mm was used. As the inner container 6, a laminate bag of 180 mm × 180 mm with a four-side seal was formed into a laminate shape as shown in FIG. 29A, and a heat storage main material containing 100 parts by weight of sodium acetate trihydrate was sealed therein.

In the fourth embodiment, the outer container 5 is used in the third embodiment.
The cross section shown in FIG. As the inner container 6, the same one as in Example 3 was formed into a laminate shape shown in FIG. 29A, and the same heat storage main material as in Example 3 was sealed therein.

In the fifth embodiment, the outer container 5 is used as shown in FIG.
Has the cross-sectional shape shown in the inside, 190 mm x 190 mm x
A PP hollow container having a thickness of 20 mm, an end portion having a thickness of 2 mm, and a center portion having a thickness of 5 mm was used. The same inner container 6 as in Example 3 was formed into a laminate shape as shown in FIG.
The same heat storage material as in Example 3 was sealed therein.

In the sixth embodiment, the outer container 5 is used in the third embodiment.
The cross section shown in FIG. As the inner container 6, a laminated bag having a 180 mm × 180 mm four-sided seal and an upper / lower two-layer structure was formed into a laminated shape shown in FIG. 29A, and the same heat storage material as in Example 3 was sealed therein.

In the seventh embodiment, the outer container 5 is used in the third embodiment.
The cross-sectional shape shown in FIG. The inner container 6 having the same shape as in Example 3 was formed into a laminate shape as shown in FIG. 29A, and the same heat storage material as in Example 3 was sealed therein.

In the eighth embodiment, the outer container 5 is used in the third embodiment.
The cross section shown in FIG. The inner container 6 was the same as in Example 3 in the laminate shape shown in FIG. 29A, and the same heat storage material as in Example 3 was sealed therein.

In the ninth embodiment, the outer container 5 is used in the third embodiment.
The same shape as in the above was used as the cross-sectional shape shown in FIG. The inner container 6 was the same as in Example 3 in the laminate shape shown in FIG. 29A, and the same heat storage material as in Example 3 was sealed therein.

In the tenth embodiment, the same outer container 5 as the one in the third embodiment has a sectional shape shown in FIG. The inner container 6 was the same as in Example 3 in the laminate shape shown in FIG. 29A, and the same heat storage material as in Example 3 was sealed therein.

The eleventh embodiment has a sectional shape shown in FIG. 17 and has an inner size of 180 mm × 180 mm × 12 mm and a thickness of 2 mm.
The same heat storage material as in Example 1 was sealed in a PP hollow container of 1 mm.

In the twelfth embodiment, the same outer container 5 as that of the third embodiment has a sectional shape shown in FIG. The inner container 6 was the same as in Example 3 in the laminate shape shown in FIG. 29A, and the same heat storage material as in Example 3 was sealed therein.

In Example 13, the outer container 5 similar to that of Example 1 had the cross-sectional shape shown in FIG. 11, and the same heat storage material as that of Example 1 was sealed therein.

In the fourteenth embodiment, the same outer container 5 as that of the third embodiment has a sectional shape shown in FIG. The inner container 6 was the same as in Example 3 in the laminate shape shown in FIG. 29A, and the same heat storage material as in Example 3 was sealed therein.

In Example 15, the same outer container 5 as that in Example 3 had a sectional shape shown in FIG. The inner container 6 was the same as in Example 3 in the laminate shape shown in FIG. 29A, and the same heat storage material as in Example 3 was sealed therein.

In the sixteenth embodiment, the outer container 5 shown in FIG.
And a 180 mm × 180 mm four-side sealed silicone rubber bag was used. The inner container 6 has an inner dimension of 190 mm x 190 mm x 20 mm and a thickness of 2 mm.
The hollow container made in a laminate shape shown in FIG.
The same heat storage material as in Example 1 was sealed therein.

In the seventeenth embodiment, the same outer container 5 as the one in the third embodiment has a sectional shape shown in FIG. The same inner container 6 as in Example 16 was used, and
A heat storage material similar to that described above was enclosed.

In Example 18, the same outer container 5 as that in Example 16 had the cross-sectional shape shown in FIG. The inner container 6 used was the same as that used in the third embodiment.
A heat storage material similar to that described above was enclosed.

In Example 19, the same outer container 5 as in Example 2 had the cross-sectional shapes shown in FIGS. 15, 21, and 23, respectively. As the inner container 6, a laminated bag made of a φ180 circular seal was formed into a laminated shape shown in FIG. 29C, and the same heat storage material as in Example 1 was sealed therein.

On the other hand, in Comparative Example 1, the same outer container 5 as in Example 11 had the cross-sectional shape shown in FIG. 18, and the same heat storage material as in Example 1 was sealed therein.

In Comparative Example 2, the same laminate bag as in Example 3 was formed into a laminate shape shown in FIG. 29A, and the same heat storage material as in Example 1 was sealed therein.

In Comparative Example 3, the inner dimensions were 180 mm × 180 m
A PP hollow container containing carbon having a size of 12 mm and a thickness of 2 mm was formed into a cross section shown in FIG. 18, and the same heat storage material as in Example 1 was sealed therein.

[0083]

[Table 1]

[0084]

[Table 2]

Note that in Tables 1 and 2 above, Note 1)
Is the maximum partial temperature reached until complete melting, Note 2) is the difference between the maximum and minimum temperatures of the latent heat storage element until complete melting, and Note 3) is the temperature of the latent heat storage element without shaking. The minimum time for cooling (the crystal is completely dissolved) and the minimum time when the crystal is broken or deformed, including the inside and outside, and cannot be returned to its original state.

Example 20 and Comparative Example 4 In Example 20, the outer container 5 had the cross-sectional shape shown in FIGS. 32 (a) to (d) and had an inner size of 190 mm × 190 mm × 20 m.
m, width 5m on the upper and lower surfaces of a PP hollow container with a thickness of 2mm
Four ribs 20 having a height of 6 mm and a height of 6 mm were arranged at regular intervals so as to face each other. The inner container 6 is 180 mm x 180 m
The laminating bag with a four-sided seal of m was formed into a laminated shape as shown in FIG. 29 (a), and a heat storage material comprising 100 parts by weight of sodium thiosulfate pentahydrate was sealed therein.

In Comparative Example 4, the outer container 5 had the sectional shape shown in FIG.
A hollow container made of PP having a thickness of 0 mm and a thickness of 2 mm was used. The inner container 6 was the same as in Example 20 in the laminate shape shown in FIG. 29A, and the same heat storage material as in Example 20 was sealed therein.

In Example 20 described above, the container breakage time when heated by the microphone mouth wave was compared with Comparative Example 4, and the results are shown in Table 3. From Table 3, it can be seen that the container 3 with the rib 20 of the present invention has no deformation.

[0089]

[Table 3]

Example 21 and Comparative Example 5 In Example 21, the outer container 5 had the cross-sectional shape shown in FIGS. 31A and 31B and had an inner size of 200 mm × 200 mm × 50 mm.
1mm height on the top and bottom of 2mm thick PP hollow container
Ribs 20 each having a thickness of 0 mm and a thickness of 3 mm were provided, and the laminated portions of the inner container 6 were pressed with the ribs 20.
The inner container 6 is a laminate bag of 180 mm × 180 mm with a four-side seal as shown in FIG. 27A, in which 100 parts by weight of sodium acetate trihydrate and 100 parts by weight of sodium pyrophosphate pentahydrate are contained. One part by weight of the heat storage material was sealed.

In Comparative Example 5, the outer container 5 has a sectional shape shown in FIG. 1 and has an inner size of 190 mm × 190 mm × 50.
A hollow container made of PP having a thickness of 2 mm and a thickness of 2 mm was used. The same inner storage container 6 as in Example 21 was used, and the same heat storage material as in Example 21 was sealed therein.

In Example 21, the container breakage time when the inner container 6 was held down by the ribs 20 of the outer container 5 was compared with that without the rib. Table 4 shows the results.

[0093]

[Table 4]

[Examples 22 to 24, Comparative Example 6] Example 2
2, the outer container 5 has a cross-sectional shape shown in FIG. 9 and has an inner size of 190 mm × 190 mm × 20 mm and a thickness of 2 m.
m hollow container made of PP was used. The inner container 6 is 180 m
Fig. 27 shows a mx180mm four-sided seal laminate bag.
(A) The laminated shape shown in (a) was used, and sodium acetate trihydrate contained 100 parts by weight of the heat storage main material.

In Example 23, the same outer container 5 as that of Example 22 had a sectional shape shown in FIG. The inner container 6 used was the same as in Example 22, and the same heat storage material as in Example 22 was enclosed therein.

In Example 24, the same outer container 5 as that of Example 22 had a sectional shape shown in FIG. The inner container 6 used was the same as in Example 22, and the same heat storage material as in Example 22 was enclosed therein.

In Comparative Example 6, the outer container 5 was used as in Example 2
The cross-sectional shape shown in FIG. The inner container 6 used was the same as that in Example 22.
The same heat storage material as in No. 2 was enclosed.

In the above Examples 22 to 24, the judgment display provided on the outer container 5 was compared with the convenience in heating the latent heat storage element of Comparative Example 6 without the judgment display. Table 5 shows the results.

[0099]

[Table 5]

[Embodiment 25, Comparative Example 7] In embodiment 25, as shown in FIG. 7, a trigger element 21 is installed in the inner container 6 and a trigger is protruded from the upper and lower surfaces of the outer container 5. The element 21 was fixed. When pressure is applied to the operation unit 25 of the outer container 5, the force is applied to the block operation unit 2
5 shows that the light is transmitted to the trigger element 21 linearly, and the operation of the trigger element 21 can be stably performed.

In the comparative example 7, the trigger element 21 is installed in the inner container 6 as shown in FIG. 6, but the trigger element 21 is not fixed by the outer container 5. In this case, the force applied from the outer container 5 is hardly transmitted to the trigger element 21, and the operation may be unstable.

[0102]

As described above, according to the first aspect of the present invention, a latent heat storage element which can be heated by microwaves, wherein the latent heat storage material is sealed in a container having a low dielectric loss coefficient. Microwaves easily penetrate into a container made of a material having a low dielectric loss coefficient, and the latent heat storage material can be efficiently heated. The temperature can be prevented, the whole can be heated uniformly, and the container itself is hard to be heated, so that the damage can be reduced. Furthermore, since the latent heat storage material has a structure that does not leak out of the container, if the latent heat storage material is damaged due to misuse by the user during heating (for example, forgetting to heat and leaving it for a long time) Also, the internal latent heat storage material can be prevented from leaking to the outside, and the risk of damage, contamination, and odor of peripheral devices can be eliminated.

According to a second aspect of the present invention, in addition to the effect of the first aspect, the latent heat storage material is made of a substance which reaches a supercooled state by heating, and the supercooled state of the latent heat storage material is optionally released. Since the release means is provided, it is possible to uniformly reach the supercooled state by complete melting of the entire latent heat storage material, so that the problem of abnormal temperature rise due to uneven heating does not occur. By releasing it, unevenness in heat generation can be eliminated.

According to the third aspect of the present invention, in addition to the effect of the first aspect, since the container is formed of a flexible material, a hard material, or a multi-layered container made of a combination thereof. The combination can be freely selected according to the application, and since the container has a multiple structure, it is effective in preventing deformation and breakage of the container due to expansion of air.

According to a fourth aspect of the present invention, in addition to the effect of the third aspect, the multi-layered container includes an inner container in which a latent heat storage material is sealed, an outer container in which the inner container is stored, and an inner container. Since it has a liquid reservoir that is installed between the outer containers and prevents the latent heat storage material in the inner container from leaking to the outside, even if the inner container is damaged due to overheating, The presence of the liquid reservoir prevents leakage to the outside. In addition, the liquid storage portion plays a role of heat insulation, and the temperature is hardly increased even after heating, so that the liquid storage portion is easily carried.

The invention according to claim 5 provides the invention according to claims 1-4.
In addition to the effect described in any one of the above, the heating of the latent heat storage medium by the microwave is provided when the latent heat storage medium is heated by the microwave because the pressure reducing means for preventing the inside of the container from becoming high pressure is provided. It is possible to prevent the container from being damaged at the time.

According to the invention of claim 6, in addition to the effect of claim 5, the whole or a part of the container is made of a material that allows gas to pass without passing through the liquid. The pressure can be reduced without leakage.

According to the seventh aspect of the present invention, in addition to the effect of the fifth aspect, since a part of the container is constituted by a combination of a pressure reducing valve and a material that allows only gas without passing through liquid,
The pressure can be reduced more reliably without the internal latent heat storage material leaking out.

The invention according to claim 8 provides the invention according to claims 1 to 7
In addition to the effect described in any one of the above, when heating the latent heat storage material by microwaves, it is configured to reduce the temperature difference in the thickness direction of the latent heat storage material, that is, heat in the upper part of the latent heat storage material By lowering the upper and lower temperatures of the latent heat storage material even when microwave heating is performed using a microwave oven, for example, The temperature difference can be reduced, and the entire latent heat storage material can be uniformly heated.

According to a ninth aspect of the present invention, in addition to the effect of the first or second or eighth aspect, the latent heat storage material has a latent heat of fusion between the main heat storage material and the melting point and boiling point of the main heat storage material. Since it is composed of heat storage sub-materials, even if the heat storage main material reaches the sensible heat region and the temperature rises very easily during heating by the microphone mouth wave, this temperature region (between the melting point and the boiling point) By simultaneously encapsulating the heat storage sub-material having a latent heat region, the rate of rise in the temperature of the latent heat storage body can be suppressed, which is effective for uniform heating.

According to the tenth aspect of the present invention, in addition to the effect of the ninth aspect, since the density of the heat storage main material is higher than the density of the heat storage auxiliary material, the heat storage main material and the heat storage auxiliary material are mixed and sealed. In this case, the heat storage auxiliary material having a low density automatically moves toward the upper part as it approaches the heat-melted state, thereby serving to suppress a rapid rise in the temperature of the heat storage main material, which is effective through the entire uniform heating. .

According to the eleventh aspect of the present invention, in addition to the effect of the first or second or eighth aspect, a stirrer having high thermal conductivity is mixed inside the latent heat storage material, so that the stirrer is heated when heated by a microphone mouth wave. The stirrer works as a heat equalizing material, and the stirrer stirs the entire latent heat storage material by carrying immediately after heating, so that the material temperature can be made uniform.

The invention according to claim 12 is the first invention.
In addition to the effect described in any one of 11 above, when heating the latent heat storage medium by the microwave, the microphone mouth wave is concentrated on the lower part of the latent heat storage medium, and the entire heating is performed by convection from the lower part to the upper part of the latent heat storage material. Since the microphone heat wave concentration means is provided, the so-called convection that the latent heat storage material heated and melted rises to the upper part of the latent heat storage material and the upper latent heat storage material descends to the lower part, The whole can be melted efficiently.

The invention according to claim 13 is the first invention.
In addition to the effect described in any one of 12 above, at the time of heating the latent heat storage element by the microwave, since the microwave shield is applied to the upper part of the latent heat storage element, the irradiation amount from the lower direction of the latent heat storage element can be reduced. More and more, the latent heat storage material in the lower part can be melted first, and the whole can be uniformly heated by convection.

The invention according to claim 14 is the same as the claim 12.
In addition to the effects described, when the latent heat storage medium is heated by the microwave, since the latent heat storage body is composed of the upper latent heat storage material layer and the lower water layer, the water layer where microwaves are particularly likely to concentrate Since the water layer is heated first by being located below the latent heat storage material layer, the crystals existing at the lower portion of the latent heat storage material can be efficiently heated and melted from below, and the entire uniform heating can be achieved. it can.

The invention according to claim 15 provides the invention according to claim 12
In addition to the effects described, the microphone mouth wave concentrating means has a parabolic shape for concentrating the microwave at the lower part of the latent heat storage at the lower part of the latent heat storage at the time of heating the latent heat storage by the microwave. Therefore, the microwave can be concentrated on the lower part of the latent heat storage material, and the crystal existing on the lower part of the latent heat storage material can be heated and melted from below, so that the whole can be uniformly heated.

The invention according to claim 16 is based on claim 12.
In addition to the effects described in any one of (1) to (15), at the time of heating the latent heat storage element by the microwave, a heat insulating material is provided below the latent heat storage element. Heat can be stored inside without losing heat again, and overall uniform heating is promoted.

The invention according to claim 17 is the invention according to claims 1 to
In addition to the effect described in any one of 16 above, since the shape of the latent heat storage medium is made into a shape capable of concentrating the microwave irradiation energy to each place of the latent heat storage medium when heating the latent heat storage medium by the microwave, By devising the shape of each part according to the ease of concentration, partial heating unevenness can be prevented, and uniform heating can be achieved as a whole.

The invention according to claim 18 is directed to claim 17
In addition to the effects described above, when heating the latent heat storage element by microwaves, the thickness of the end part of the latent heat storage element is made larger than the thickness of the central part. When microwave heating is performed using, for example, a microwave oven, a large amount of latent heat storage material is present in a place where microwaves are easily concentrated, and uniform heating can be performed as a whole.

The invention according to claim 19 is the invention according to claim 17.
In addition to the effects described above, when heating the latent heat storage element by microwaves, the shape of the latent heat storage element is circular or hexagonal or more polygonal, so that there is no sharp corner where microwaves are easily concentrated. Thus, the concentration of microphone mouth waves can be reduced.

The invention of claim 20 provides the invention of claim 11
To 19, in addition to the effects described in
Since at least one of heat storage completion, supercooling release possible, and heat storage remaining is provided, it is possible to prevent overheating or heat storage in heating the latent heat storage body by microwaves. By displaying whether or not it is at a temperature at which supercooling can be released or how much heat storage is left, etc.
Usability as a latent heat storage material can be improved.

The invention according to claim 21 is based on claim 20.
In addition to the effects described, since the judgment display means is a temperature indicating tape indicating a temperature change, by attaching the temperature indicating tape to the surface of the latent heat storage material, the heat storage of the latent heat storage material can be completed, the supercooling can be released, and the remaining heat storage amount can be determined. You can check at a glance.

The invention according to claim 22 is the invention according to claims 3 to
21. In addition to the effect described in any one of 21, the pressure sensor and the alarm are provided between the inner container and the outer container to prevent overheating, so for example, the outer container is made of a hard material, When the inner container is made of a flexible material, the inner container undergoes volume expansion due to heating and heating, and at this time, a pressure sensor and an accompanying indicator are used at that part by utilizing the fact that the space between the outside and the inside is compressed. By installing a, abnormal temperature rise can be sensed by sound, and heating can be stopped before damage to the container occurs.

The invention according to claim 23 is the invention according to claims 1 to
In addition to the effects described in any one of 7 above, since the sealing portion of the inner container made of a flexible material is pressure-bonded with a rib protruding from the outer container, the inner container may be broken due to abnormal temperature rise. The seal part of the inner container mainly breaks first, but the seal part of the inner container is compressed by the rib protruding from the outer container to increase the strength of this seal part, so that the strength of the seal part is increased. Up and extend the time to destruction of the inner container.

The invention according to claim 24 is the same as the invention according to claim 23.
In addition to the effects described above, since the ribs are made of a flexible reinforcing material, the shape of the inner container made of a flexible material can be stably maintained against pressure from the ribs.

According to a twenty-fifth aspect of the present invention, in addition to the effect of the second aspect, a release element for releasing the supercooled state of the latent heat storage material is provided inside the container and the trigger element is provided outside the container. The trigger element comprises an operating section for operating the trigger element, wherein the trigger element has a latent heat storage material embryo adhered to the surface of the trigger material, and the deformation of the trigger material by the operating section causes agglomeration of the embryos to form crystal nuclei. The supercooled state of the latent heat storage material is released by the gasification propagating to the entire latent heat storage material, and heat is generated by heating the latent heat storage material by uniform heating of the latent heat storage material by the microphone mouth wave. It becomes easy to eliminate the unevenness, and as a result, the entire latent heat storage material can be uniformly brought to the supercooled state.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the present invention, in which an outer container is made of a hard material and an inner container is made of a flexible material.

FIG. 2 is a cross-sectional view when both the outer container and the inner container are made of a hard material.

FIG. 3 is a cross-sectional view of a case where both the outer container and the inner container are made of a flexible material.

FIG. 4 is a sectional view when the outer container is a flexible material and the inner container is a hard material.

FIGS. 5A and 5B are explanatory diagrams of a trigger element for releasing supercooling of the latent heat storage material according to the first embodiment.

6A is a cross-sectional view when a trigger element is installed in the inner container of the above, FIG. 6B is an explanatory view showing a state where the trigger material is installed in a convex shape, and FIG. It is explanatory drawing of the state which installed.

FIGS. 7A and 7B are cross-sectional views when a trigger element is fixed to the outer container of the above.

FIG. 8 is a cross-sectional view when a liquid reservoir is provided between the outer container and the inner container according to the first embodiment.

FIG. 9 is a cross-sectional view when an air reservoir and a pressure reducing valve are installed in the inner container of the above.

FIG. 10 is a cross-sectional view when an air reservoir and a gas selective permeable film are installed in the inner container of the above.

FIG. 11 is a cross-sectional view when a pressure reducing valve and a gas selective permeable film are installed in the outer container made of the above hard material.

FIG. 12 is an explanatory diagram of a state of irradiation of a microwave to a latent heat storage element in the microwave oven of the above.

FIG. 13 is a graph showing a rise in the temperature of the latent heat storage element when there is and does not have a heat storage sub-material during heating.

FIG. 14 is a cross-sectional view when a heat storage auxiliary material is installed on the upper surface of the inner container of the above.

FIG. 15 is a cross-sectional view illustrating a state in which the latent heat storage material and the heat storage auxiliary material are mixed, in which (a) illustrates a state before heating and (b) illustrates a state after heating.

FIG. 16 is a cross-sectional view in the case where a stirrer having high thermal conductivity is provided in the latent heat storage material of the above.

FIG. 17 is a cross-sectional view of a case where a material having high thermal conductivity is provided above the latent heat storage material of the above and a high conductive material that transmits the heat to the lower part is provided.

FIG. 18 is a cross-sectional view of a case where a latent heat storage material is sealed in the rigid container.

FIG. 19 (a) is a cross-sectional view illustrating a state where microwaves are concentrated below the latent heat storage material of the above, and FIG. 19 (b) illustrates a state where the molten latent heat storage material is rising to the upper part. It is sectional drawing.

FIG. 20 is a cross-sectional view in the case where a microwave shielding material is provided inside the upper surface of the outer container of the above.

FIG. 21 is a cross-sectional view illustrating a case where a microwave shielding material is provided on the upper surface of the inner container of the above.

FIG. 22 is a cross-sectional view illustrating a case where the inner container is divided into upper and lower parts, the upper part is a latent heat storage material layer, and the lower part is an aqueous layer.

FIG. 23 is a cross-sectional view illustrating a case where water is injected between the inner container and the outer container of the above.

FIG. 24 is an explanatory view showing a case where a parabolic reflector is provided below the latent heat storage element and microwaves are concentrated below the latent heat storage element.

FIG. 25 is a cross-sectional view illustrating a case where a heat insulating material is provided below the inner container.

FIG. 26 is a cross-sectional view illustrating a portion of the inner container in which a microphone mouth wave is easily concentrated.

FIG. 27 is a cross-sectional view illustrating a case where the center of the inner container is thinner and the ends are thicker due to the shape of the outer container.

FIG. 28 is a cross-sectional view illustrating a case where the center of the inner container is thinner and the ends are thicker due to the shape of the heat insulating material installed below the inner container.

FIG. 29 is a cross-sectional view illustrating an example of the shape of the inner container, in which (a) is a square, (b) is a hexagon, and (c) is a circle.

FIGS. 30 (a) and (b) are cross-sectional views illustrating a case where a piezoelectric sensor is installed inside the upper surface of the above outer container and an alarm is attached in conjunction therewith.

FIGS. 31 (a) and (b) are cross-sectional views illustrating a state in which a sealing portion of a laminate bag constituting an inner container is pressed by the outer container.

32 (a) to (c) are cross-sectional views illustrating a case where ribs are provided on the upper and lower surfaces of the outer container, (d) is a perspective view, and (e) is a boss installed instead of the ribs. It is a perspective view in the case.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Latent heat storage body 2 Latent heat storage material 3 Container 4 Release means 5 Outer vessel 6 Inner vessel 6a Sealing part 7 Liquid reservoir 8 Decompression means 9 Stirrer 10 Heat storage main material 11 Heat storage auxiliary material 12 Microphone wave concentration means 13 Microphone wave Shield 14 Latent heat storage material layer 15 Water layer 16 Insulation material 17 Judgment display means 18 Pressure sensor 19 Alarm 20 Rib 21 Trigger element

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C09K 5/06 C09K 5/06 Z H05B 6/64 J H05B 6/64 F28D 20/00 D (72) Invention Person Sakae Uchinashi 1048 Kazuma Kadoma, Kadoma City, Osaka Prefecture F-term in Matsushita Electric Works Co., Ltd.

Claims (25)

[Claims] 1. A latent heat storage element capable of being heated by microwaves, wherein a latent heat storage material is sealed in a container having a low dielectric loss coefficient, and the latent heat storage material does not leak out of the container. A latent heat storage element capable of microwave heating. 2. The method according to claim 1, wherein the latent heat storage material is made of a substance which is brought into a supercooled state by heating, and further comprising a release means for arbitrarily releasing the supercooled state of the latent heat storage material. Latent heat storage element capable of microwave heating. 3. The microwave heatable latent heat storage element according to claim 1, wherein the container is formed of a multi-layered container made of a flexible material, a hard material, or a combination thereof. 4. A container having a multi-layer structure, comprising: an inner container in which a latent heat storage material is sealed; an outer container in which the inner container is stored; and a latent heat storage material in the inner container which is provided between the inner container and the outer container. 4. The microwave heatable latent heat storage element according to claim 3, further comprising a liquid reservoir for preventing leakage to the outside. 5. The container according to claim 1, further comprising a decompression means for preventing the inside of the container from becoming high pressure when heating the latent heat storage medium by microwaves. Latent heat storage element capable of microwave heating. 6. The container according to claim 5, wherein the whole or a part of the container is made of a material that allows only gas and not liquid.
The latent heat storage medium capable of microwave heating according to the above. 7. The microwave heatable latent heat storage element according to claim 5, wherein a part of the container is constituted by a combination of a pressure reducing valve and a material that allows only gas without passing through liquid. 8. The apparatus according to claim 1, wherein a temperature difference in a thickness direction of the latent heat storage material is reduced when the latent heat storage material is heated by the microwave.
The microwave heatable latent heat storage element according to any one of the above. 9. The heat storage material according to claim 1, wherein the heat storage material comprises a heat storage main material and a heat storage auxiliary material having a latent heat of fusion between a melting point and a boiling point of the heat storage main material. The latent heat storage medium capable of microwave heating according to the above. 10. The microwave heatable latent heat storage element according to claim 9, wherein the density of the heat storage main material is higher than the density of the heat storage auxiliary material. 11. The microwave heatable latent heat storage element according to claim 1, wherein a stirrer having high thermal conductivity is mixed inside the latent heat storage material. 12. When heating a latent heat storage medium by microwaves, the microphone mouth wave is concentrated on the lower part of the latent heat storage medium, and the microphone mouth wave concentration for heating the whole by convection from the lower part to the upper part of the latent heat storage material. The microwave heatable latent heat storage element according to any one of claims 1 to 11, further comprising means. 13. The microwave heatable apparatus according to claim 1, wherein a microwave shield is provided on an upper portion of the latent heat storage element when heating the latent heat storage element with the microwave. Latent heat storage element. 14. The microwave heating apparatus according to claim 12, wherein, when heating the latent heat storage element by the microwave, the latent heat storage element is composed of an upper latent heat storage material layer and a lower water layer. Possible latent heat storage. 15. The microphone mouth wave concentrating means has a parabolic shape at the lower part of the latent heat storage element for concentrating the microwave on the lower part of the latent heat storage element when heating the latent heat storage element by the microwave. The microwave heatable latent heat storage element according to claim 12, characterized in that: 16. The microwave heatable latent heat according to claim 12, wherein a heat insulating material is provided below the latent heat storage body when the latent heat storage body is heated by the microwave. Heat storage. 17. The latent heat storage element according to claim 1, wherein the shape of the latent heat storage element is such that microwave irradiation energy can be concentrated on each location of the latent heat storage element when the latent heat storage element is heated by the microwave. The microwave heatable latent heat storage element according to any one of the above. 18. The microwave heatable latent heat according to claim 17, wherein, at the time of heating the latent heat storage body by the microwave, the thickness of the end of the latent heat storage body is made larger than the thickness of the central part. Heat storage. 19. The microwave heatable latent heat storage element according to claim 17, wherein the shape of the latent heat storage element is circular or hexagonal or more polygonal when heating the latent heat storage element by microwaves. 20. The apparatus according to claim 1, further comprising at least one of judgment means for preventing excessive temperature rise, completion of heat storage, release of supercooling, and remaining heat storage. The latent heat storage medium capable of microwave heating according to the above. 21. The microwave heatable latent heat storage element according to claim 20, wherein the judgment display means is a temperature indicating tape indicating a temperature change. 22. The micrometer according to claim 3, wherein a pressure sensor and an alarm are provided between the inner container and the outer container to prevent overheating. Wave heatable latent heat storage. 23. The microwave heating device according to claim 1, wherein a sealing portion of the inner container made of a flexible material is pressure-bonded with a rib projecting from the outer container. Possible latent heat storage. 24. The latent heat storage element according to claim 23, wherein the rib is made of a flexible reinforcing material. 25. A release device for releasing a supercooled state of the latent heat storage material includes a trigger element provided inside the container, and an operation unit for operating the trigger element from outside the container, wherein the trigger element comprises: Embryos of the latent heat storage material are attached to the surface of the trigger material, and the deformation of the trigger material by the operation unit causes the embryos to aggregate and form crystal nuclei, and this crystallization propagates to the entire latent heat storage material, whereby the latent heat storage material The microwave heatable latent heat storage element according to claim 2, wherein the superheated state is released to generate heat.