JPH0665113B2 - Low temperature far infrared radiator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is used for low-temperature warming equipment, such as electric heating carpets, electric heating blankets, electric heating blankets, electric heating cushions, and winter clothes, which are warmed by contact with the human body. Low temperature far infrared radiator.

[Conventional technology and its problems]

The infrared stove, infrared kotatsu, etc. that have been conventionally used for heating are devices for heating infrared rays by heating a ceramics sintered body with a nichrome wire heating element or the like to 800 ° C. or higher. In the case of the conventional infrared stove, infrared kotatsu, etc., since humans warm up at a necessary distance from the heating element, there is no problem even if the temperature of the heating element is high. However, when the human body temperature is 37 ° C, the wavelength is 9.34 μm according to the Vienna displacement law formula (μm = 2898 / T), so the healthy wavelength desired by the human body is 8.21 μm to 9.25 μm.
Is. That is, it can be said that 40 ° C to 80 ° C is most effective.

The conventional ceramics sintered body emits near infrared rays of 2.7 μm when heated to 800 ° C. Near-infrared rays are not effective for human health because they reflect on the human body and feel stimulating heat.

Today, the peak radiation temperatures of various ceramics, which are attracting attention as the most efficient infrared radiators, are extremely high as shown below.

1. ZrO ₂ (zirconia) ... 800 ° C 2. SiO ₂ (silica) ... 800 ° C 3. TiO ₂ (titania) ... 600 to 1000 ° C. 4. CaCO ₃ (magnesia)… 800 ° C 5. BeO (Belliria) ... 800 ° C 6. Al ₂ O ₃ (alumina) ... 200 to 2000 ° C. The standard heating temperature of an electric heating carpet, an electric heating blanket or the like that warms by contact with a human body is 60 ° C. The ceramics listed above
When heated to a temperature of 60 ° C, effective far infrared rays to the human body are not always emitted.

The materials of conventional infrared radiators are ceramics and clay. That is, it is a powder of stone, a powder of soil, a powder of iron oxide, etc., and the specific gravity of the powder reaches 2 to 6.

Recently, bedding tends to be lighter, and when ceramics is used for the electric heating blanket or the electric heating cloth which is the bedding, the weight becomes several times, and it is difficult to put it into practical use (commercialization).

The first object of the present invention is the most effective wavelength for human health 8.
The second purpose is to obtain far infrared rays of 21 μm to 9.25 μm at low cost, and the second purpose is to realize a product that is lightweight and comfortable to use by applying to bedding or cold clothes. Is for the utilization of waste and non-use goods, and the fourth purpose is flexibility and flexibility applicable to low-temperature warming equipment that comes into contact with the human body.
The point is to provide a stable heating element.

[Means for solving problems]

The first invention is a low-temperature far-infrared radiator mainly composed of animal or vegetable oils and fats.

The second invention is a low-temperature far-infrared radiator using a combination of plant powder, animal or plant oil and fat.

[Action]

Generally, the above-mentioned low-temperature warming equipment is heated to 40 ° C to 80 ° C (standard temperature of 60 ° C), but when it receives such low temperature heat, it emits far-infrared rays with a wavelength of 8.21μm to 9.25μm that the human body desires most. .

〔Example〕

 Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

First, an application example of the present invention will be described. 3 is a string-like far-infrared radiation structure, and this structure 3 has a spiral shape on the outer periphery of the core yarn 6 as shown in FIG. Heating line 7
The heating wire portion 9 is formed by winding the wire and covering the insulator 8 from the outside, and the low temperature far infrared radiator 10 according to the present invention is externally mounted on the heating wire portion 9. The low-temperature far-infrared radiator 10 is made of a material and a structure which will be described later and receives heat from the internal heating wire portion 9 and emits far-infrared rays. In the present invention, "low temperature" means 40 ° C to 100 ° C. And,
“Far infrared” means 3 μm or more according to the definition of Japan Far Infrared Society.

In the specific example shown in FIG. 3, the far-infrared radiator 10 is a fiber or tape 11 made of a material to be described later that emits far-infrared rays.
It consists of a horizontal roll. It has excellent flexibility and flexibility.

Next, in the specific example shown in FIG. 4, the far-infrared radiator 10 is braided with fibers made of the material described below, and has the advantage of great flexibility.

Next, as shown in FIG. 5, it is also desirable that the far-infrared radiator 10 is obtained by thermoplasticizing a material described below and coating the heating wire portion 9 in a tubular shape by extrusion molding.

Further, as shown in FIG. 6, it is also preferable that a powder or a solubilized material composed of a material described later is coated on the insulator 8 to form the far-infrared radiator 10 in the form of a coating film.

Next, FIG. 2 shows a specific example of an insulating heater used for the electric heating carpet 1 shown in FIG.

That is, as shown in FIG. 10, a string-like far-infrared radiation structure 3 is inserted in a meandering shape inside the rectangular carpet body 2.
It is also connected to the temperature controller 4 and the power cord 5. Then, as shown in FIG. 2, the temperature sensing wire 12 is spirally wound around the core yarn 6, and the polymer thermistor layer 13 is coated thereon, and the heating wire 7 is spirally wound around it. In addition, the insulator 8 is covered to form the heating wire portion 9, and the flexible far-infrared radiator 10 is covered thereon. And, generally speaking, the string-like far-infrared radiation structure 3 has a diameter of approximately 1 to 1.
It is a string with a diameter of about 4 mm. The one shown in FIG. 2 is also used for an electric heating blanket, an electric heating cloth, and the like.

Next, FIGS. 7 and 8 show still another embodiment.

The core thread 6 is made of a material such as elastically deformable rubber or plastic, around which the temperature sensing wire 12 and the elastic adjustment thread 14 are wound. The polymer thermistor layer 13 is also made of a material that is elastically deformable, and the heating wire 7 is spirally wound around this. From above, an insulator 8 made of a material such as elastically deformable rubber or plastic is installed to form a heating wire portion 9 which is elastic in the longitudinal direction. Then, the heating wire portion 9 is covered with a far-infrared radiator 10 having elastic elasticity so that the cord-like far-infrared radiation structure 3 is expandable as a whole.

Further, in the illustrated example, the core yarn 6 has a substantially circular cross section and has longitudinal first ridges 15 ... In addition, the small hole 16 is provided in the shaft center to improve the expansion / contraction rate. The core yarn 6 is preferably made of, for example, a polymer having excellent heat resistance and expansion / contraction recovery property, for example, a copolymer containing silicon as a main component.

The temperature sensing wire 12 is formed of a copper alloy on a strip foil. The stretchable and deformable polymer thermistor layer 13 has a substantially cylindrical shape and has second ridges 17 ... The polymer thermistor layer 13 is made of a copolymer of polyamide, polyester, a blended elastomer, etc., and has a so-called "thermistor characteristic" in which the internal resistance changes according to the temperature change, and is excellent in moisture absorption resistance and stretch recovery. Material. As the heating wire 7, a copper alloy strip foil is used. As the insulator 8, it is preferable to use a non-migrating polymer that has excellent heat resistance and is capable of expanding and contracting.

The string-shaped far-infrared radiation structure 3 configured in this way is
The elastic core yarn 6, the temperature sensing wire 12, the polymer thermistor layer 13, the heating wire 7, the insulator 8 and the far-infrared radiator 10 are expanded and contracted integrally in synchronization with each other.

Further, even in the stretched state, the temperature sensing wire 12 and the heating wire 7
However, it is effectively prevented that the spiral winding pitches of the first and second projecting ridges 15 ... And the second projecting ridges 17 are pressed against each other and become non-uniform.

The shape of the core yarn 6 or the polymer thermistor layer 13 is
It is preferable to have the first protruding portion 15 and the second protruding portion 17, respectively, and the design can be freely changed. FIG. 9 is a cross-sectional view showing another modification of the core yarn 6. That is, FIG. 9I shows that a plurality of first ridges 15 are formed in a substantially circular cross section having a small hole 16 in the axial center, and have a sharp cross section in the longitudinal direction of the outer circumference. It is a thing. (In FIGS. 7 and 8, the tip of the first ridge 15 has a roundness.) FIG. 9 II shows a star-shaped elastic core yarn 6, each tip of which is the first ridge 15.
Acts as. FIG. 3I is formed in a rectangular shape, and each corner portion functions as the first ridge portion 15. Further, IV and V are elastic core yarns 6 formed in a pentagonal shape and a hexagonal shape, respectively, and each corner portion functions as the first ridge portion 15, as in IV. In this way, various polygonal shapes can be selected according to the purpose or preference. It goes without saying that the modified example of the polymer thermistor layer 13 is also applicable to the example shown in FIG.

If the whole can be expanded and contracted as shown in FIGS. 7 to 9,
It is suitable for winter clothes, jackets, etc., where the frequency of stretching and flexing is high.

Next, the composition of the low-temperature far-infrared radiator 10 in each of the above-described drawings will be described in detail.

A radiator (radiation source) that emits far infrared rays at a low temperature of 40 ° C. to 100 ° C. uses the following material B as a main component. Alternatively, A and B are used in combination.

A: Plant powder ... For example, rice grain powder, buckwheat husk powder,
Wheat hull powder, bean hull powder, straw powder, wood flour,
Or the carbide (or ash) of these things.

B: Animal or vegetable oils and fats ... For example, whale oil, fish oil, cow oil,
Other meat and animal fats, as well as soybean oil, pine oil,
Rapeseed oil, etc.

Furthermore, if desired, one or two of the following materials C and D may be added.

C: Volcanic ash: Volcanic ash deposits called Shirasu.

D: Rubber, plastic ... Natural rubber, vinyl acetate, etc., which have a particularly high far infrared absorption rate.

Therefore, when the material B is used as the main component and the material A is not added to it, the material B is used as the main component,
If a small amount of material A is added to this, or if at least one of materials C and D is further added,
When using two kinds of A and B, when using two kinds of A and B and adding at least one of the materials C and D to this,
Etc. can be selected.

Further, an example will be specifically described. Examples 1, 2, 3
Corresponds to the above.

(Example 1) When the string-like far-infrared radiation structure 3 of FIG. 1 was made by using the above-mentioned composition by the thermoplastic method and was used for the electric heating carpet shown in FIG. 10, the temperature range of 40 ° C. to 80 ° C. Even if I adjusted the temperature with the temperature controller 4, I was able to always sense the warmth and comfort. When the far-infrared radiation amount was measured, it was confirmed that the radiation was stable and efficient in the above temperature range.

The reason is as follows. That is, animal oil is an excellent low-temperature far-infrared radiator, and its emission peak temperature is 40
It is ℃ ~ 50 ℃. Vegetable oil has a slightly higher peak temperature than animal oil, and is 50 to 60 ° C. Rice husk is the best low-temperature far-infrared radiator among plant powders, and is 50 ℃ -70 ℃.
Shows high radiation function. Wood flour has a slightly inferior radiant function as compared to rice husk, but when used together as an auxiliary agent for rice husk, it exhibits the same radiant function as rice husk. Among rubbers and plastics, those having a particularly high absorption rate for far infrared rays can be used as the radiator, but the radiation power is weak when used alone. However, when used in combination with animal or vegetable oils and fats, it becomes an excellent radiator. The emission peak temperature of vinyl acetate is 60 ° C. The temperatures listed above are the most desired by the human body: 8.21 μm to 9.25 μm
The far-infrared wavelength of the above, and by combining these materials in combination, it is possible to efficiently radiate far-infrared rays effective for the human body at any temperature between 40 ° C and 80 ° C. became.

(Example 2) When the string-like far-infrared radiation structure 3 shown in FIG. 7 was made by the above-mentioned composition using the thermoplastic method and was sewn in a meandering shape in winter clothes, it was always fluffy in the temperature range of 40 ° C to 80 ° C. A comfortable product was obtained. The radiation peak temperature of natural rubber is 80 ° C, and it has the advantage of being highly stretchable.

(Example 3) With such a composition, the fabric is lined to form a planar far-infrared radiator 10 as shown in FIG. 11, and the heating wire 7a as an insulating heater is provided between the carpet underlay 18 and the carpet upholstery 19. It was laminated in a sandwich form and used for an electric heating carpet. Stable far infrared rays are radiated in the temperature range of 40 ℃ to 60 ℃, and it is comfortable for your body. Since fats and oils B of animals and plants have a far-infrared absorption and radiant power of 95% or more, those mixed with powder A of plants and the like can be separated from a living tree by heating at an appropriate low temperature. Equivalent to receiving infrared rays, it is considered that the effect of forest bathing can be obtained.

As described above, the low temperature far infrared radiator 10 according to the present invention
Can be made into a string (Figs. 1 to 10) or planar (Fig. 11)
As a drawing), it can be used for a wide range of purposes. Incidentally, FIGS. 1 to 8
In the figure, when the strength of the far-infrared radiator 10 is insufficient, felt bodies, tapes, and braids made of various materials are covered from above, and particularly those are integrally covered with an adhesive material. desirable.

〔The invention's effect〕

The present invention has the following significant effects with the above configuration.

It can be used as waste material or disused material, contributing to resource saving. For example, rice husk is an agricultural waste generated when rice is threshed, and wood flour is a waste such as sawdust generated during lumber processing.

Since it is lightweight, it is ideal for bedding and the like. That is, the material of the conventional infrared radiator is ceramics, clay, iron oxide or the like, and its specific gravity is as large as 2 to 6, but in the present invention, the specific gravity is about 1 like the fats and oils of animals or plants. Or a small one such as rice husk powder having a specific gravity of 0.1 to 0.3 is used.

All objects radiate infrared rays with an intensity corresponding to their absolute temperature, but not all of these infrared rays are absorbed by the human body and contribute to health promotion. Infrared rays are closely related to temperature and have a characteristic of radiating from a higher temperature to a lower temperature. However, when the difference in temperature between the radiator and the object to be irradiated (absorber), that is, the difference in wavelength is large, the object is not absorbed and reflected. The reflex becomes an irritating heat and is harmful to health. The body temperature of the human body is 37 ℃,
Its wavelength is 9.34 μm. The wavelength absorbed by the human body is
Shorter wavelength and shorter wavelength-about 8.21μm-9.25
μm−. If this is expressed in temperature, it will be 40 ° C to 80 ° C. Far-infrared rays of this wavelength act on the wavelength of the human body, arouse the resonant action of oscillatory molecular motion, cause resonant motion, and activate intracellular chemical substances. In the present invention, by using the above-mentioned material, a large amount of far infrared rays of 8.21 μm to 9.25 μm, which is effective for the human body, is generated in the temperature range of 40 ° C. to 80 ° C., and it is possible to contribute to the health promotion of the body.

Electric heating carpets, electric heating blankets, which come in contact with the human body
It has a wide range of applications such as electric heating cloths, electric heating cushions, and winter clothes, and it is possible to obtain products with high safety and flexibility.

Far-infrared rays are efficiently generated from a small amount of heat source, which helps save energy.

Although infrared rays are currently focused on ceramics, it can be said that the present invention has focused on familiar industrial waste and excavated valuable resources that emit effective far infrared rays.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention, FIG. 2 is a side view of another embodiment, FIGS. 3 to 6 are side views showing other specific examples, and FIG. FIG. 8 is a perspective view showing another embodiment, FIG. 8 is an enlarged cross-sectional view thereof, FIG. 9 is a cross-sectional view showing a modified example of the main part, and FIGS. 10 and 11 are plan views showing application examples. . 3 ... string-like far-infrared radiation structure, 6 ... core thread, 7 ... heating wire, 8 ... insulator, 9 ... heating wire part, 10 ... low temperature far-infrared radiation body.

Claims (4)

[Claims] 1. A low-temperature far-infrared radiator mainly composed of the following material B. B: Animal or vegetable oil 2. The low-temperature far-infrared radiator according to claim 1, further comprising a rubber or a plastic having a high far-infrared absorption coefficient in the balance. 3. A low temperature far infrared radiator using a combination of the following two materials A and B. A: Plant powder B: Animal or vegetable oils and fats 4. The low-temperature far-infrared radiator according to claim 3, wherein the balance contains rubber or plastic having a high far-infrared absorption rate.