JP2005183016A - Electromagnetic wave absorbing heating element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic wave absorbing heating element which can be restrained from protruding from an application object or, even if it protruded, restrained from stinging a human body. <P>SOLUTION: With the electromagnetic wave absorbing heating element 10, conductive fiber 12 absorbs electromagnetic waves to radiate heat when the electronic waves are irradiated on an applied object. Here, with the electronic wave absorbing heating element 10, an insulation coating material 14 coats the conductive fiber 12, so that the heating element can be made thicker. As a result, an end part of the electromagnetic wave absorbing heating element 10 is prevented from protruding from the surface of the applied object, or even if it protrudes, the end part of the electromagnetic wave absorbing heating element 10 can be restrained from stinging a human body. Further, the insulation coating material 14 can be prevented from damage since it has thermal resistance, even if the conductive fiber 12 absorbs the electromagnetic waves and radiates heat. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electromagnetic wave absorption heating element that generates heat by absorbing electromagnetic waves.

  For example, since a basket or pillow has heat insulation properties, even if hot air is blown onto the basket or pillow, the inside of the basket or pillow cannot be heated, and it is difficult to sterilize mites and the like. In particular, hospitals have the responsibility to sterilize baskets and pillows hygienically. If chemical means are used to sterilize baskets and pillows, they can accumulate in the environment and, for example, people with allergic reactions may react sensitively. Adversely affected.

  Here, in order to solve these problems, there is a textile product such as a cocoon band to which the radio wave absorbing fiber is applied (for example, see Patent Document 1).

  In this textile product, radio wave absorption fibers are provided inside, or radio wave absorption fibers are woven into the outer surface. When the textiles are irradiated with microwaves, the radio wave absorption fibers absorb the microwaves. Heat is generated and the textile product is sterilized. For this reason, the safe disinfection including the inside of a textile product is attained.

However, in this fiber product, since the thickness (diameter) of the radio wave absorption fiber is about 10 microns, the radio wave absorption fiber may protrude from the fiber product and stab the human body.
JP 2000-171150 A

  In view of the above facts, an object of the present invention is to obtain an electromagnetic wave absorption heating element that can suppress protrusion from an application target or can suppress stabbing of a human body even when protruding from the application target.

  The electromagnetic wave absorption heating element according to claim 1 is made to be at least one of a state of being movable with respect to an application target and a state of being arranged on a surface of the application target, and is elongated and has conductivity. A conductive member that generates heat by absorbing electromagnetic waves; and a covering member that covers the conductive member.

  The electromagnetic wave absorption heating element according to claim 2 is the electromagnetic wave absorption heating element according to claim 1, wherein the conductive member covers an elongated core member.

  The electromagnetic wave absorption heating element according to claim 3 is the electromagnetic wave absorption heating element according to claim 1 or 2, wherein the covering member has an end portion thicker than other portions. .

  An electromagnetic wave absorption heating element according to claim 4 is the electromagnetic wave absorption heating element according to any one of claims 1 to 3, wherein a gap is provided between the conductive member and the covering member. It is a feature.

  The electromagnetic wave absorption heating element according to claim 5 is the electromagnetic wave absorption heating element according to any one of claims 1 to 4, wherein the covering member has a plurality of elongated members. doing.

  The electromagnetic wave absorption heating element according to claim 6 is the electromagnetic wave absorption heating element according to claim 5, wherein the long member has heat melting property and the long member is temporarily melted by heat. Thus, the plurality of long members are welded to each other to form the covering member.

  The electromagnetic wave absorption heating element according to claim 7 is the electromagnetic wave absorption heating element according to any one of claims 1 to 6, wherein the covering member has heat resistance.

  The electromagnetic wave absorption heating element according to claim 8 is the electromagnetic wave absorption heating element according to any one of claims 1 to 7, wherein the conductive member has flexibility.

  In the electromagnetic wave absorption heating element according to claim 1, at least one of a state of being movable with respect to the application target and a state of being arranged on the surface of the application target is made long and conductive. The conductive member having heat generates heat by absorbing electromagnetic waves.

  Here, since the covering member covers the conductive member, the electromagnetic wave absorption heating element can be thickened. For this reason, it can suppress that an electromagnetic wave absorption heating element protrudes from an application object, or even when an electromagnetic wave absorption heating element protrudes from an application object, it can suppress that an electromagnetic wave absorption heating element stabs a human body.

  In the electromagnetic wave absorption heating element according to claim 2, since the conductive member covers the core member, the electromagnetic wave absorption heating element can be made thicker. For this reason, it becomes possible to further suppress the electromagnetic wave absorption heating element from protruding from the application target, or even when the electromagnetic wave absorption heating element protrudes from the application target, the electromagnetic wave absorption heating element can be further suppressed from piercing the human body.

  In the electromagnetic wave absorption heating element according to claim 3, since the end portion is thicker than other parts, the electromagnetic wave absorption heating element can be effectively prevented from protruding from the application target, or the electromagnetic wave absorption heating element. Even when protruding from the application target, it is possible to effectively suppress the electromagnetic wave absorption heating element from piercing the human body.

  In the electromagnetic wave absorption heating element according to claim 4, since there is a gap between the conductive member and the covering member, the electromagnetic wave absorption heating element can be made thicker. For this reason, it becomes possible to further suppress the electromagnetic wave absorption heating element from protruding from the application target, or even when the electromagnetic wave absorption heating element protrudes from the application target, the electromagnetic wave absorption heating element can be further suppressed from piercing the human body.

  In the electromagnetic wave absorption heating element according to claim 5, since the covering member has a plurality of elongated members, the electromagnetic wave absorption heating element can be appropriately thickened. For this reason, it can suppress appropriately that an electromagnetic wave absorption heating element protrudes from an application object, or even when an electromagnetic wave absorption heating element protrudes from an application object, it can control appropriately that an electromagnetic wave absorption heating element stabs a human body.

  In the electromagnetic wave absorption heating element according to claim 6, the covering member is separated from the conductive member because the plurality of long members are welded to each other by temporarily melting the long member by heat. Can be suppressed. For this reason, it can suppress well that an electromagnetic wave absorption heating element protrudes from an application object, or even when an electromagnetic wave absorption heating element protrudes from an application object, it can suppress well that an electromagnetic wave absorption heating element stabs a human body.

  In the electromagnetic wave absorption heating element according to claim 7, since the covering member has heat resistance, even if the conductive member absorbs electromagnetic waves and generates heat, the covering member can be prevented from being damaged.

  In the electromagnetic wave absorption heating element according to claim 8, since the conductive member has flexibility, the conductive member can be prevented from being bent and shortened, and the electromagnetic wave absorption and heating performance of the conductive member can be prevented from being lowered. it can.

  FIG. 1A shows a perspective view of an electromagnetic wave absorption heating element 10 according to an embodiment of the present invention.

  The electromagnetic wave absorption heating element 10 according to the present embodiment includes a conductive fiber 12 as a conductive member. The conductive fiber 12 is a metal fiber such as a stainless fiber, a carbon fiber, or the like, and has a long circular cross section. It is made into a long fiber shape and has conductivity and flexibility. The length of the conductive fiber 12 is, for example, about 1 cm to 10 cm, and the diameter of the conductive fiber 12 is about 10 microns. The conductive fiber 12 generates heat by absorbing electromagnetic waves (microwaves).

  The outer periphery of the conductive fiber 12 is coated (coated) with an insulating coating material 14 as a coating member, and the insulating coating material 14 has a long cylindrical shape and has an insulating property. Moreover, the insulating coating material 14 has heat resistance against the heat generation of the conductive fibers 12, and the insulating coating material 14 is used when the conductive fibers 12 generate heat at a high temperature (about 100 ° C. to 200 ° C.). For example, when the conductive fiber 12 is not heated to a very high temperature while being made of a fluororesin such as Teflon (registered trademark) or polyimide, it can be made of a resin such as polyethylene, nylon, or acrylic.

  As shown in FIG. 1 (B), the conductive fiber 12 (conductive material) covers the outer periphery of the core material 16 as a core member having a circular cross-sectional shape in a long cylindrical shape ( It may be configured to be coated or plated. In this case, the core material 16 has insulating properties.

  Furthermore, as shown in FIG. 4A, the end face of the conductive fiber 12 may be covered with the insulating coating material 14. In this case, the end portion of the electromagnetic wave absorption heating element 10 is made thicker than the other parts by the insulating coating material 14.

  Further, as shown in FIGS. 2A and 4B, the insulating coating material 14 is composed of a plurality of insulating fibers 18 having a long cross-sectional shape as a long member, and a long fiber shape, and Alternatively, the conductive fibers 12 may be blended with the plurality of insulating fibers 18 and the outer periphery of the conductive fibers 12 may be covered (enclosed) with the plurality of insulating fibers 18. In this case, when the insulating fibers 18 have heat melting properties, the plurality of insulating fibers 18 are heated and temporarily melted as shown in FIG. May be welded together.

  Further, as shown in FIGS. 3 and 4C, the insulating coating 14 is formed into a tube, and the conductive fibers 12 are inserted into the insulating coating 14 to insulate the outer periphery of the conductive fibers 12. It is good also as a structure coat | covered with the coating | covering material 14 (surrounded). In this case, a gap is formed between the conductive fiber 12 and the insulating coating material 14.

  In the present embodiment, for example, the diameter of the electromagnetic wave absorption heating element 10 (diameter of the outer peripheral inner portion) is 1.5 times or more the diameter of the conductive fiber 12 (diameter of the outer peripheral inner portion). The cross-sectional area of the body 10 (the area of the outer peripheral inner part) is set to be twice or more the cross-sectional area of the conductive fiber 12 (the area of the outer peripheral inner part), for example, the diameter of the electromagnetic wave absorption heating element 10 (the diameter of the outer peripheral inner part). Is 50 microns or more.

  FIG. 5 shows an applied product 20 as an application target to which the electromagnetic wave absorption heating element 10 is applied.

  In the present embodiment, the applied product 20 is made into a pillow 22 and a basket 24 (bed), and the electromagnetic wave absorption heating element 10 is mixed in a long fibrous cushion material 26 such as cotton in the applied product 20. Yes.

  The applied product 20 may be configured to be clothes, stuffed animals, vehicles, theater seats, office chairs, and the like.

  Further, as shown in FIG. 6A or FIG. 6B, the electromagnetic wave absorption heating element 10 may be woven into the long fibrous constituent fibers 28 constituting the outer surface of the applied product 20. In this case, the object into which the electromagnetic wave absorption heating element 10 is woven may be a sheet shape, and the applied product 20 may be configured as a curtain (cloth) or the like.

  In the application product 20 described above, at least one of a configuration in which the electromagnetic wave absorption heating element 10 is relatively movable in a normal use state and a configuration in which the electromagnetic wave absorption heating element 10 is disposed (for example, exposed) on the surface is used. ing. In particular, when the electromagnetic wave absorption heating element 10 is movable relative to the application product 20 in a normal use state of the application product 20, the application product 20 is made deformable.

  FIG. 7 shows the relationship between the sheet resistivity (sheet resistance) of the sheet resistor (sheet resistance) and the energy of reflection, transmission and absorption of electromagnetic waves in the sheet resistor (Energy). A representing graph is shown.

  The energy of reflection, transmission, and absorption in the sheet resistor does not depend on the frequency of the electromagnetic wave but depends on the sheet resistivity of the sheet resistor.

  From FIG. 7, in the case of a complete sheet resistor, in order to maximize the absorption energy of electromagnetic waves in the sheet resistor (50% (6 dB)), the sheet resistivity of the sheet resistor is set to 60π [Ω / □. It is necessary to match the vicinity. On the other hand, the applied product 20 shown in FIG. 6 (A) or FIG. 6 (B) has a configuration in which the electromagnetic wave-absorbing heating element 10 is woven into the constituent fibers 28 and is not a complete sheet resistor. For this reason, in order to maximize the absorption energy of the electromagnetic wave application product 20, it is necessary to slightly shift the surface resistivity of the application product 20 from 60π [Ω / □] due to the impedance of the conductive fiber 12. . In addition, the surface resistivity of the applied product 20 can be controlled by changing the cross-sectional area, conductivity, and arrangement interval of the conductive fiber 12 of the electromagnetic wave absorption heating element 10.

  Next, the operation of the present embodiment will be described.

  In the applied product 20 to which the electromagnetic wave absorption heating element 10 according to the present embodiment is applied, the electromagnetic wave absorption heating element 10 is disposed on the surface and in a state in which the electromagnetic wave absorption heating element 10 is relatively movable in a normal use state. When the applied product 20 is irradiated with electromagnetic waves by an electromagnetic wave irradiation device (not shown), the conductive fibers 12 of the electromagnetic wave absorption heating element 10 absorb the electromagnetic waves and generate heat. For this reason, the applied product 20 can be sterilized effectively.

  In addition, as shown in FIG. 5, when the electromagnetic wave absorption heating element 10 is provided inside the applied product 20, the inside of the applied product 20 can be sterilized without using chemical means. It can be sterilized safely. For this reason, when the applied product 20 is a hospital pillow 22 or a band 24, an effective sanitary system can be constructed by providing an electromagnetic wave irradiation room in which an electromagnetic wave irradiation device is installed in the hospital. .

  Further, as shown in FIG. 6 (A) or FIG. 6 (B), when the applied product 20 is formed into a sheet shape and the electromagnetic wave absorption heating element 10 is woven into the applied product 20, the applied product 20 is thin and light. Can be manufactured inexpensively.

  Here, in the electromagnetic wave absorption heating element 10, since the insulating coating material 14 covers the conductive fiber 12, the electromagnetic wave absorption heating element 10 can be thickened. For this reason, it can suppress that the edge part of the electromagnetic wave absorption heating element 10 protrudes from the surface of the application product 20, or even when the edge part of the electromagnetic wave absorption heating element 10 protrudes from the surface of the application product 20, the electromagnetic wave absorption heating element 10 It is possible to suppress the end of the body from piercing the human body.

  Furthermore, as shown in FIG. 1B, when the conductive fiber 12 covers the core material 16, the electromagnetic wave absorption heating element 10 can be made thicker. For this reason, it becomes possible to further suppress the end portion of the electromagnetic wave absorption heating element 10 from protruding from the surface of the application product 20, or even when the end portion of the electromagnetic wave absorption heating element 10 protrudes from the surface of the application product 20. It becomes possible to further suppress the end of the heating element 10 from piercing the human body.

  Further, as shown in FIG. 4A, when the end of the electromagnetic wave absorption heating element 10 is made thicker than other parts, the end of the electromagnetic wave absorption heating element 10 protrudes from the surface of the applied product 20. Even if the end portion of the electromagnetic wave absorption heating element 10 protrudes from the surface of the applied product 20, the end portion of the electromagnetic wave absorption heating element 10 can be effectively suppressed from piercing the human body.

  Further, as shown in FIGS. 3 and 4C, when a gap is formed between the conductive fiber 12 and the insulating coating material 14, the electromagnetic wave absorption heating element 10 can be made thicker. Become. For this reason, it becomes possible to further suppress the end portion of the electromagnetic wave absorption heating element 10 from protruding from the surface of the application product 20, or even when the end portion of the electromagnetic wave absorption heating element 10 protrudes from the surface of the application product 20. It becomes possible to further suppress the end of the heating element 10 from piercing the human body.

  Further, as shown in FIG. 2A, FIG. 4B, or FIG. 2B, when the insulating coating material 14 has a plurality of insulating fibers 18, the electromagnetic wave absorption heating element 10 is appropriately thickened. can do. For this reason, it can suppress appropriately that the edge part of the electromagnetic wave absorption heat generating body 10 protrudes from the surface of the application product 20, or even when the edge part of the electromagnetic wave absorption heating element 10 protrudes from the surface of the application product 20, It can suppress appropriately that the edge part of the body 10 stabs a human body.

  Furthermore, as shown in FIG. 2 (B), when the insulating coating material 14 is configured by welding the plurality of insulating fibers 18 to each other by temporarily melting the plurality of insulating fibers 18 by heat, It can suppress that the insulating coating | covering material 14 isolate | separates from the conductive fiber 12. FIG. For this reason, it can suppress well that the edge part of the electromagnetic wave absorption heat generating body 10 protrudes from the surface of the application product 20, or even when the edge part of the electromagnetic wave absorption heating element 10 protrudes from the surface of the application product 20, It is possible to satisfactorily suppress the end of the body 10 from piercing the human body.

  Moreover, since the insulating coating material 14 has heat resistance, even if the conductive fiber 12 absorbs electromagnetic waves and generates heat, the insulating coating material 14 can be prevented from being damaged.

  Furthermore, since the conductive fiber 12 has flexibility, the conductive fiber 12 can be prevented from being broken and shortened, and the electromagnetic wave absorption heat generation performance of the conductive fiber 12 can be suppressed from being lowered.

(A) And (B) is a perspective view which shows the electromagnetic wave absorption heat generating body which concerns on embodiment of this invention. (A) And (B) is a perspective view which shows the electromagnetic wave absorption heat generating body which concerns on embodiment of this invention. It is a perspective view which shows the electromagnetic wave absorption heat generating body which concerns on embodiment of this invention. (A) thru | or (C) is sectional drawing which shows the electromagnetic wave absorption heat generating body which concerns on embodiment of this invention. It is the front view which shows the internal structure of the applied product at the time of being made into the pillow and the saddle band in embodiment of this invention, and the side view which shows the said applied product. (A) And (B) is a perspective view which shows the applied product at the time of making it into a sheet form in embodiment of this invention. It is a graph showing the relationship between the surface resistivity of a sheet resistor, and the energy of reflection, permeation | transmission, and absorption in the sheet resistor of electromagnetic waves.

Explanation of symbols

10 Electromagnetic wave absorption heating element 12 Conductive fiber (conductive member)
14 Insulating coating material (coating material)
16 Core material (core member)
18 Insulating fiber (long member)
20 Applicable products (Applicable objects)
22 Pillow (Applicable)
24 Band (Applicable)

Claims (8)

  A conductive member that is at least one of a state that is movable with respect to the application target and a state that is disposed on the surface of the application target, is elongated and has conductivity and absorbs electromagnetic waves; and An electromagnetic wave absorption heating element comprising: a covering member that covers the conductive member.   2. The electromagnetic wave absorption heating element according to claim 1, wherein the conductive member covers an elongated core member.   The electromagnetic wave absorption heating element according to claim 1 or 2, wherein the end portion is thicker than other portions.   The electromagnetic wave absorption heating element according to any one of claims 1 to 3, wherein a gap is provided between the conductive member and the covering member.   The electromagnetic wave heating element according to any one of claims 1 to 4, wherein the covering member has a plurality of elongated members.   The long member has heat melting property, and the long member is temporarily melted by heat to weld the plurality of long members to each other to form the covering member. The electromagnetic wave absorption heating element according to claim 5.   The electromagnetic wave heating element according to any one of claims 1 to 6, wherein the covering member has heat resistance.   8. The electromagnetic wave absorption heating element according to any one of claims 1 to 7, wherein the conductive member has flexibility.

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