JP2005212471A - Energy-saving heat retaining cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an energy-saving heat retaining cover excellent in heat retaining efficiency by shielding a heat loss by radiation from a body. <P>SOLUTION: The energy-saving heat retaining cover is formed by piling a heat ray absorbing sheet and a heat ray reflecting sheet up and by covering both sides by a cloth. When a heat is required from outside, the body is warmed by a heat ray radiated from the heat ray absorbing sheet heated to about 40°C by turning an electric current on. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

Detailed Description of the Invention

  The present invention relates to an energy-saving heat-retaining cover that can absorb heat radiated from a human body and re-radiate it toward the human body to prevent a decrease in body temperature and warm the body by heating with a small amount of electric power when it is extremely cold.

    The reason why I feel cold when the temperature is low is that my body temperature is taken away by cold air. There are three different mechanisms for transferring body temperature to the air: conduction, convection, and radiation, and conventional clothing is designed to warm the body by preventing heat conduction and convection, which are simple measures. However, since heat radiation from the body penetrates ordinary fibers, there is little thermal insulation effect against radiant heat loss.

  A major reason that conventional heat-retaining techniques have overlooked radiant heat loss from the body is the problem of temperature dependence that radiant heat loss is proportional to the fourth power of the absolute temperature (Stephan Boltzmann's law). According to this law, the amount of radiant heat from a heat source of about body temperature is very small compared to a high temperature heat source. This is why the usable temperature range of a normal radiation thermometer is 500 ° C. or higher.

  Further, according to Wien's displacement law that the energy of radiation and the wavelength at which it is maximized are inversely proportional, the intensity distribution of infrared rays having a wavelength of 6 μm or more is extremely small. Since the wavelength of the heat rays radiated from the human body is about 10 μm, the radiant intensity has an even weaker impression.

  The above two laws regarding heat radiation indicate that the amount of heat radiation from a low temperature heat source is small compared to the amount of heat radiation from a high temperature heat source, and that the absolute amount of heat radiation from a heat source of about body temperature is small. It is not shown.

  In recent years, with the progress of far-infrared research, radiant heat loss from the body has attracted attention, and sheets that incorporate far-infrared carbon particles and ceramic fine particles have been developed (patents) Literature). This utilizes the phenomenon in which far-infrared rays emitted from the body are captured and re-emitted by ceramic particles. According to this method, half of the far-infrared rays emitted by the ceramic particles go to the outside air, so there remains a problem in efficiency.

JP-A-11-206539

Problems to be solved by the invention

  By adding a mechanism that prevents radiant heat loss to conventional fabrics, a warm, energy-saving and warming cover is created even during cold weather without wearing thick clothing.

Means for solving the problem

The present inventors pay attention to the fact that the surface of the human body has an extremely high thermal emissivity of 0.98, and consumes a large amount of energy and generates a large amount of heat in the cold, and intensive research is being conducted to solve the above problems. went. As a result, if we make a sheet that combines carbon, which is the material with the highest thermal emissivity, with a mirror metal with an extremely low emissivity, and a structure in which both sides are covered with ordinary cloth, there will be very little heat loss due to radiation and conduction. The knowledge that cloth can be obtained was acquired.
The present invention is based on this finding,
1. An energy-saving heat insulation cover constructed by stacking a sheet that absorbs heat rays and a sheet that reflects heat rays, and covering both sides of the sheet with cloth.
2. An energy-saving heat insulation cover that combines a heat-absorbing sheet and a heat-reflecting sheet into one sheet, with one side being a heat-absorbing layer and the other side being a heat-ray reflecting layer.
3. An energy-saving heat-retaining cover in which the heat-absorbing sheet includes carbon fiber, carbon sheet, or fine carbon powder, and the heat-reflective layer is either aluminum foil, fine powder, or a vapor deposition surface.
4). An energy-saving thermal insulation cover that can heat a heat-absorbing sheet by energization is provided.

  The present invention supplements the heat rays emitted from the human body with a heat ray absorbing sheet, paying attention to the fact that carbon is an excellent absorption / radiation material for heat rays. As a result, half of the heat rays re-radiated from the heated heat-absorbing sheet directly warms the body, and the other half of the radiation going in the opposite direction of the body sends the heat-reflective sheet back to the body, so efficient body warming is achieved. it can.

  When the sheet that absorbs heat rays and the sheet that reflects are thin, the effect of the thickness on the function is small. Therefore, even if the absorption and reflection of heat rays are separate sheets, there is no change in the effect even if the functions are provided on both sides of the same sheet. By covering both surfaces of these sheets with a cloth, the appearance is a normal cloth and the touch is close to that of a normal cloth, but the body can be kept warm effectively.

Examples and Comparative Examples

  Examples of the present invention are shown below, but these are merely examples of the present invention, and the present invention is not limited to the conditions of the following Examples. That is, the present invention naturally includes structural changes, modifications, and other embodiments within the scope of the technical idea described in the specification.

(Example 1)
A graphite fine powder was spray-coated on one side of a 15 μm thick soft vinyl chloride sheet, and aluminum was deposited on one side to obtain a heat ray absorbing / reflecting sheet. The both surfaces were covered with a cloth having a thickness of about 1 mm and heat-pressed from both sides to produce an energy-saving heat retaining cover. The graphite spray surface of this energy-saving heat insulation cover was attached to the seat and back of the sofa with the body side. An energy-saving heat insulation cover was attached to the inner surface of the sock, and 20 cm from the tip of the hand was covered with a cylinder of heat insulation cloth. Furthermore, he spent 1 hour in a room with a room temperature of 5 ° C. with his / her lower limbs covered with an energy-saving insulation cover. After about 10 minutes, I couldn't feel the cold and I could spend it without heating.

(Comparative example)
The vinyl chloride sheet of Example 1 was used in a transparent state having neither an absorption layer nor a reflection layer, and both surfaces thereof were covered with a cloth. When this cloth was installed in the same state as in Example 1 and spent 1 hour in a room at 5 ° C., the back, hands, and thighs were cold, and the temperature was insufficient for the purpose of heat insulation.

(Example 2)
The heat ray reflective sheet and the covering cloth were the same as those in Example 1, and a carbon fiber nonwoven fabric having dimensions of 40 cm × 30 cm and a thickness of 2 mm was used as the heat ray absorbing sheet. When an aluminum electrode was attached to both sides and an alternating current of 3.5 volts and 2.5 amperes (about 9 watts) was applied, the energy-saving thermal insulation cover became slightly warm. Bare feet were placed on this energy-saving and warming cover in a room at 5 ° C., and the periphery of the foot was covered with the energy-saving and warming cover of Example 1 that was not energized. The whole leg became warm in about 5 minutes by the heat rays radiated from the heated energy-saving insulation cover. Unlike the conventional energy-saving thermal insulation cover, there was no drawback of the feet getting cold for the first few minutes, and it also functioned as a foot warmer with half the power consumption.

The invention's effect

  In the present invention, heat lost by radiation from the body is recovered by a heat ray absorbing sheet and re-released to warm the body. By using a combination of a heat ray absorbing sheet and a heat ray reflecting sheet, the reheated heat rays can be used to keep the body warm effectively. Even if two sheets of heat-absorbing sheet and reflecting sheet are bonded together, the effect does not change even if the respective functions are provided on both sides of one sheet. The cloth covering the sheet in a sandwich shape can prevent heat loss due to heat conduction and convection, and can improve the appearance and feel. When the heat ray absorbing sheet and the reflection sheet are electrically insulated, the body can be positively warmed by heating the carbon fiber or the carbon sheet, which is the heat ray absorbing sheet, by energization. The applied voltage for heating is as low as about 3 volts, the heating temperature is about 40 ° C., and a large amount of heat rays having a wavelength of about 10 μm, which has a large effect of warming the body, are emitted, so there is no fear of electric shock, low temperature burns, or overheating.

It is a figure which shows the structure of this invention.

Explanation of symbols

1. Cloth 2. 2. Heat ray absorbing sheet Heat ray reflective sheet 4. cloth

Claims (4)

  An energy-saving and warming cover that consists of a heat-absorbing sheet and a heat-reflecting sheet stacked and covered with cloth.   An energy-saving heat insulation cover that combines a heat-absorbing sheet and a heat-reflecting sheet into one sheet, with one side being a heat-absorbing layer and the other side being a heat-ray reflecting layer.   An energy-saving heat-retaining cover in which the heat-absorbing sheet contains carbon fiber, carbon sheet, or fine carbon powder, and the heat-reflective layer is aluminum, an alloy foil, fine powder, or a vapor deposition surface. An energy-saving thermal insulation cover that can warm your body by energizing a sheet that absorbs heat rays.

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