JPH01187794A - Microwave heat accumulator and heat-insulating apparatus utilizing microwave heat emission - 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 The present invention consists of a heat storage body that generates heat and retains heat using microwaves, and a structure using the heat storage body, and is arranged in the oven compartment of a microwave oven to be used for microwave heating. This relates to heat-retaining equipment that generates heat.

Conventional technology Conventionally, heat storage bodies store heat by directly transferring physical heat generated from external sources such as solar energy, electric resistance heat generation, and combustion energy of oil and gasoline to the heat storage material, and are used in devices such as electronic lenses. A microwave heat storage device for use in this field had not yet been developed.

Furthermore, no technology had been developed for using the inside of a microwave oven as a heat-retaining compartment.

Approximate problem to be solved by the invention: There is a desire to be able to use the inside of a microwave oven as a heat-retaining compartment, and for this reason, it is required to be able to take out the inside of a microwave oven and use it to generate heat and store heat by oscillating microwaves. A thermal insulation device is required. However, as mentioned above, technology for storing heat by microwave heating used in devices such as microwave ovens has not been developed as a heat storage body, and as a matter of course, the inside of the microwave oven is used as a heat storage. Therefore, no heat-retaining device had been developed that could be inserted into and taken out of the oven separately and used microwave oscillations to keep the oven warm.

Means for Solving the Problems The present invention solves the above problems by using heat generating materials such as particles that generate heat by absorbing microwaves used in microwave ovens etc. (for example, granular materials such as SiC and ferrite). A microwave absorption product made by blending a heat storage material with a heat storage material, or by filling and enclosing a material that absorbs microwaves such as an inorganic salt hydrate to generate heat and store heat in a hollow capsule that transmits microwaves. This provides a heat generating heat storage body.

Furthermore, the present invention allows the inside of the microwave oven to be 111
In order to keep food warm and heat-retaining cooking using microwave heating, the microwave heat-generating and heat-retaining device uses the above-mentioned microwave heat storage body, that is, the inner container is made of a material that reflects microwaves and transfers heat, and the inner container is made of a material that transmits microwaves and transmits microwaves. In addition, an outer container is formed of a heat-resistant and non-heat transfer material, and a material layer is formed in the space between the inner container and the outer container to transmit microwaves and insulate the outer container side in the space. In addition, the above-mentioned microwave-generated heat storage body is installed between the material layer and the inner container in a close-contact structure that facilitates heat transfer to the inner container. The present invention provides a micro heat-generating heat-retaining device that can be freely placed in and out of the room.

Function: According to the microwave heat storage body described above, the heat generating material absorbs microwaves and generates heat to raise the temperature, and the heat storage material stores the heated heat, and the heat storage material also generates heat by microwaves. If so, it absorbs microwaves and generates heat to raise the temperature, and the heated heat is stored, so the microwaves can be used for heat storage.

Further, according to the microwave heat-generating heat-retaining device, the microwaves oscillated inside the microwave oven pass through the outer container and the heat-insulating material layer of the heat-retaining device, absorb the microwaves in the heat storage body, and generate heat. The heat generated by the microwave is stored in the heat storage material in the heat storage body, raising the temperature inside the heat retention device. It can be maintained at a constant temperature. Therefore, if a holding device is installed in the micro-heated oven chamber of a conventional single-function microwave oven or oven-function microwave oven, the temperature inside the warming device can be raised and a constant temperature can be maintained. By keeping food warm, the inside of a microwave oven can be used as a heat-retaining chamber.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be explained in detail with reference to embodiments shown in the drawings.

(Heat Storage Body) FIG. 1 shows a microwave heat storage plate 1 that generates heat and stores heat by irradiation with microwaves, and as shown in FIG. 3 and a heat storage material 4 are filled and sealed.

In order to prevent the hollow capsule 2 from expanding and contracting due to repeated heat storage and heat dissipation, resulting in cracks, fissures, and rupture, a void 5 is provided inside to moderate the expansion and contraction.

The hollow capsule 2 is made of a hollow molded body made of a material that transmits microwaves and is heat resistant, such as polypropylene resin or polyethylene resin.

As the heat-generating material 3 sealed in the hollow capsule 2, silicon carbide or ferrite particles that generate heat by absorbing microwaves are used, and as shown in FIG. 3, particles 3a, 3b, and 3c of different sizes are used. are appropriately mixed to improve heat generation efficiency when absorbing microwaves.

The material of the heat storage material 4 that is mixed with the heat generating material 3 and stores the heat generated by the heat generating material 3 varies depending on the intended heat storage temperature and the purpose of use. For example, set the heat storage temperature to 60
When the temperature is around °C, NaCIIPCQt, 311.0 (sodium acetate), which is a hydrate of an inorganic salt, is used as the heat storage material. In addition, if the heat storage temperature is around 90℃, KA
I(So,), 1211,0 is used, and if the temperature is about 120°C, MgCl2 is used if it is an inorganic salt hydrate.
．． 61120, and high-density polyethylene is used as the polymer other than the inorganic salt hydrate.

The amount of particles of the heat generating material 3 is 4
It is better to set it to 0% or more, and the size of the particles is 40 microns or more for the largest particle 3a, and 10% for the next largest particle 3b.
~40 microns, preferably 10 microns or less for the smallest particle 3C.

The blending ratio of these particles 3a, 3b, and 3c is preferably equal, with 3a and 3b being equal in weight, and if the blending ratio is such that 3a + 3b > 3c, heat generation and heat storage are likely to occur.

Sodium acetate used when the heat storage temperature is about 60° has a melting point of 58°C and a heat of fusion (Jug) of 25 + .

The latent heat per solid unit volume is 364 J/Cm3 and 58
High temperature latent heat storage at ℃.

When the above-mentioned 3-eight salt of sodium acetate is used as the heat storage material 4, the heat storage material 4 is blended at a weight ratio of 60%, the microphone [I wave absorbing exothermic material 3] is blended at a ratio of 40%, and potassium bromide is further added as a nucleating agent. The hollow capsule 2 is filled and sealed with soybean paste to prevent overcooling. In addition, in addition to the two combination ratios, if the heat storage material 4 is set within the range of 60 to 40% and the heat generating material 3 is set within the range of 60 to .10%, it can be put to practical use.

The above KAI (So, ), 12!1,0 used as the heat storage material 4 when the heat storage temperature is about 90°C has a melting point of 91°C
, the heat of fusion is 232 Jug, and the latent heat per solid unit volume is 406 J/cm''.

Also, as the heat storage material 4, Mgc! is used when the heat storage temperature is about 120°C! t, 61110 has a melting point of 117°C1
Heat of fusion! 72 J/g, latent heat per unit volume of solid 271
J/cm''. High-density polyethylene has a melting point of 120-140°C, a heat of fusion of 184-201 J/g, and a latent heat of 176-+93 J/cm'' per solid unit volume.

When the heat storage material 4 is water or an inorganic salt hydrate, it absorbs microwaves and generates heat, so there is no need to mix the heat storage material 3 of solid particles such as silicon carbide or ferrite. It can be used by directly filling and sealing the hollow capsule 2.

(Microwave heat generation equipment 2!X equipment used in microwave ovens, etc.)
FIG. 4 shows a conventional single-function microwave oven 11, in which a microwave heat-generating and heat-retaining device 10 using the heat storage body is removably housed in the oven chamber 12 of the microwave oven II.

A magnetron radiation section 13 is installed at the top of the oven chamber 12 of the microwave oven 11, and the radiation section 13 is communicated with a magnetron 15 via a waveguide 14 to heat the inside of the oven chamber 12 with microwaves. ing. In addition, in Figure 4, 1
6 is the outer box.

The microwave heat-generating and heat-retaining device 10 has the structure shown in FIG. 5, and consists of a main body 20, M21, and a handle 22 attached to a lid 21. The main body 20 and the lid 2■ have the shape of a divided cylindrical container, and the upper end 20a of the main body 20! The lower end 21a of the 2+ is removably fitted tightly to block microwaves entering from the outside.

The main body 20 and the lid 2I are respectively an inner container 23 forming a microwave reflecting section and an outer container 2 forming a microwave transmitting section.
4. A microphone inserted between the inner container 23 and the outer container 24 [1-wave heat-generating heat storage section is ↑, 14-composed heat storage body 25 and microwave-transmitting heat-insulating section is formed by +1] It consists of a layer 26.

The inner container 23 is a container for keeping food warm and insulated, and is made of a material that reflects microwaves, such as aluminum treated with fluorine or alumite.The outer container 24 is made of a material that reflects microwaves. It is made of a non-heat transfer material that transmits microwaves and is heat resistant, such as polypropylene, ABS resin, ceramic, etc. A required space is provided between the inner container 23 and the outer container 24. A heat storage body 25 that absorbs surface microwaves to generate heat and store heat is installed in the space in close contact with the inner container 23, and between the heat storage body 25 and the outer container 24, the microwave A heat insulating material layer 26 is provided, which is made of a high-temperature, inorganic heat insulating material that transmits water, such as Chikara Wool (an alumina-silica fiber press board, a trade name of Isolite Industries Co., Ltd.).

The microwave heat-generating and heat-retaining device 10 having the above-mentioned structure has a fourth
As shown in the figure, it is used by being freely inserted into the oven compartment 12 of the microwave oven II to keep food F warm and cook it.

For example, as shown in FIG. 5, food F is placed in the inner container 23 of the main body 20, placed in the oven chamber 12 without the U21+, and the food F is heated in the microwave by operating a microwave oven. Cook. That is, the main body 20 of the heat-retaining device IO is used as a cooking container. After that, when the operation is stopped and the lid 21 is closed, the heat storage body 25 in the main body 20 of the heat insulating container 10 absorbs microwaves during micro heating during the operation described above, generates heat, and stores heat. Therefore, the interior of the inner container 23 of the heat-retaining device IO is maintained at a required high temperature after the operation is stopped. Therefore, the food F placed in the inner container 23
After cooking, the warming device IO is used as a jar. Furthermore, if water is placed in the main body 20 of the heat-retaining device 10, it can be used as a microwave heating jar that can be kept warm after boiling water. Note that if the heat insulating performance of the heat insulating material layer 26 is high (for example, a vacuum heat insulating material structure),
After microwave heating during cooking, the heat-retaining device 10 is placed outside the microwave oven II.The heat-retaining device IO has heat-retaining performance.

Furthermore, although not shown, if a sensor is provided to detect the temperature inside the warming device 510 and a system is provided that uses the sensor to control the oscillation of microwaves by the magnetron +5 of the microwave oven 11, the temperature inside the warming device 10 can be increased. When the temperature drops below a certain level, the magnetron 15 of the microwave oven 11 automatically activates and oscillates microwaves, absorbing the microwaves and generating and storing heat, keeping the food in the heating device at a constant temperature for the required time. Can be retained. Therefore, it can also be used as a microwave oven or jar rice cooker that generates microwave heat.

Effects of the present invention As is clear from the above explanation, the heat storage body according to the present invention can absorb microwaves to generate heat and store heat. Therefore, according to a microwave heat-generating and heat-retaining device using the heat storage body, when it is installed in a microwave heated position inside the oven of a microwave oven, the heat storage body built into the heat-retaining device absorbs microwaves. Since heat is generated and stored in the oven, food placed in the heat-insulating device can be kept at a constant temperature even after the microwave oscillation is stopped.In other words, the inside of the oven can be used as a heat-storage storage after cooking. I can do it. In addition, the microwave heat-generating and heat-retaining device can also be used as a cooking container and a heating container, so it can also be used as a jar pot, a jar rice cooker, and a cooking container storage for microwave and baking. For example, if this thermal insulation device is formed into a Tsuyabot container, if you put it inside a microwave oven and irradiate it with microwaves to keep it warm, then take it out, pack your lunch in the container, and go out. It can keep things warm and can be used instead of a thermos flask.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a heat storage body according to the present invention, and FIG.
3 is a partially enlarged view of FIG. 2, and FIG. 4 is a schematic front view showing a state in which a microwave heat-generating and heat-retaining device is placed in the oven chamber of a single-function microwave oven. FIG. 5 is a cross-sectional view of the microwave heat-retaining device. ! ... Heat storage plate, 2 ... Hollow capsule, 3
... Heat generating material, 4... Heat storage material, 10...
Microwave heat-generating and heat-retaining equipment, +1...Microwave oven, 12...Oven storage,
15...Magnetron, 20.Main body, 21...
Lid, 23 - Inner container, 24... Outer container,
25... Heat storage body, 26... Heat insulating material.

Claims (2)

[Claims] (1) A microwave heat generating heat storage material made by combining a material that absorbs microwaves to generate heat and a heat storage material, or a microwave heat generating heat storage material that absorbs microwaves to generate heat and store heat.
A microwave heat storage body that absorbs microwaves and stores heat by filling and enclosing them in a hollow capsule that transmits microwaves. (2) An inner container made of a material that reflects microwaves and transfers heat; an outer container that transmits microwaves, has heat resistance, and is made of a non-heat transfer material; and these inner containers and outer containers. In the space between, a material layer is formed that transmits microwaves and insulates the outer container side in the space, and a close structure is formed between the insulating material layer and the inner container to facilitate heat transfer to the inner container. A microwave heat-generating and heat-retaining device having a structure in which the heat storage body according to claim (1) is installed, and which is freely disposed in and out of a micro-heating oven such as a microwave oven.