WO1991001617A1 - Heat generating member - Google Patents

Abstract

A heat generating member of which the temperature can be controlled. A body (1) of heat generator having electric conductivity is coupled to electrodes (2) for carrying current via a layer (3) of positive temperature coefficient characteristics (PTC characteristics). When the temperature of the layer (3) having positive temperature coefficient characteristics rises to lie within a preset range of temperatures, the electric resistance abruptly increases in compliance with the positive temperature coefficient of the layer (3) and the current flows in a suppressed amount into the layer that has positive temperature coefficient characteristics. Accordingly, the current flows in a decreased amount into the body (1) of heat generating member and its temperature rises no more.

Description

 Heat damage Heating element Technical field

 The present invention relates to a technology for opening a body and, more specifically, for obtaining a mature body, fostering the whole structure more safely, reducing costs, and enriching the product price. Background art

 Conventionally, in order to obtain a planarized ripened body, for example, as shown in JP-A-55-117889, a resistance contact is formed on a plastic sheet. A known planar heating break is known. However, in the case of the drawn planar heating break, a controller for controlling the temperature of the planar heating element to a substantially constant temperature and a prevention of carrying. S, etc. were required separately.

 By the way, conventionally, it is necessary to separately provide a controller for controlling the intensity of the planar emission to a substantially constant angle and a device for preventing squirting, and the entire tank is formed as a mature component. It was a large scale, and the handling was troublesome, and the cost was high, and the product partners were low, which hindered its spread.

Another conventional method is that the planar heating element itself has a characteristic coefficient of accuracy, such as the planar heating break shown in Japanese Patent Publication No. 53-69336. (PTC properties) * Some ripened bodies themselves have the correctness coefficient characteristic. As a result, the distribution of carbon inside the heating element becomes non-uniform. In particular, when the size of the heating element (separation of the electrodes) becomes large, the uneven movement of carbon is large, and the distribution of carbon in the direction of the direction becomes uneven. Nana * Thus, the place where the distribution of carbon is small is Resistance increases, and there is a risk that a part of the ripening body of the bark may be partially hot-spotted, called hot spots, and the temperature distribution cannot be controlled uniformly. There is a danger of fire, etc., due to fusing, and as a result, at present, the width of the planar emitter (that is, the width of the electrode）) is at most 150 0.

 Also, it is assumed that the surface-shaped emitter itself has a characteristic of a positive coefficient of radiance, and a mixture of crystalline plastic and carbon and radiation-crosslinking the same is disclosed in Japanese Patent Publication No. 56-6771. As is known from Japanese Patent No. 92 ', the movement of carbon is suppressed in this conventional method, but there is a problem in that the radiant wall is humble.

 The present invention has been made in view of such a problem, and it is an object of the present invention to eliminate the need to separately provide a controller for controlling the temperature of the heating element main body, a crossing prevention device, and the like. The overall configuration can be made safer, the handling of the stalks can be made easier, the product quality can be increased and the cost can be reduced. DISCLOSURE OF THE INVENTION An object of the present invention is to provide a heating element that can be controlled and can form a wide ripening body.

The heating element according to the present invention is characterized in that a current-carrying electrode 2 and a conductive heating element main body 1 are combined with a positive temperature coefficient characteristic 3 having a positive filling coefficient characteristic. Here, the positive S degree coefficient characteristic is a property that when the overflow of the heater rises to the set inundation range, the electric resistance bell suddenly increases according to the temperature coefficient, and the PTC characteristic is also In this way, by connecting the current-carrying electrode 2 and the conductive ripening body main body with the positive temperature coefficient characteristic layer 3 having the positive temperature coefficient characteristic, the positive electrode The ripening body main body 1 is energized through the temperature coefficient characteristic layer 3 to increase the ripening body: ^ rest 1, but the positive temperature coefficient characteristic layer 3 has Positive S degree coefficient When the temperature rises to the temperature range, the electric resistance value increases sharply according to the positive temperature coefficient, and the amount of electricity to the positive temperature coefficient characteristic layer 3 is suppressed, and as a result, the electricity to the ripening body 1 is decreased. Then, the temperature of the ripened body 1 is further suppressed, and the temperature control area of the ripened body 1 is performed in the positive temperature coefficient characteristic layer 3 in this way. It eliminates the controller and the pedestrian arrestor that perform the temperature control, simplifies the overall configuration more safely, makes it easier to handle, reduces costs, and increases the value of the product. Since the temperature control is performed by the accuracy coefficient characteristic layer 3 in the part, the ripening body 1 has a positive; S long-term repeated use like the conventional one with the S degree coefficient characteristic. As a result, even if the width of the generator body 1 is increased, the intensity distribution is uniform. Control and can control it but also becomes possible to form a Hatsujuku body 1 of the wide, drawing the tubular single description

 FIG. 1 is a sectional view of one embodiment of the present invention, FIG. 2 is a perspective view of the same embodiment, FIG. 3 is a sectional view of another embodiment of the above embodiment, and FIG. FIG. 5 is a plan view showing a test specimen used in the experiment of the actual example of the present invention, and FIG. 6 is a graph showing the filling degree distribution of each part in the same test specimen. The best form to do »

FIG. 1 is a cross-sectional view for explaining the present invention in detail, with reference to the accompanying drawings. FIG. 1 is a cross-sectional view. The temperature coefficient characteristic layer 3 is attached to the ripening body 1 via the adhesive 4 * The heating body i is planar, flexible, and conforms to various shapes. Yes. Electrodes: 2 can be anything other than diarrhea, such as nickel. The mature body i does not have the positive S degree coefficient characteristic, and the carbon fiber, Heating element body 1 composed of a mixture of fibers mixed with metal particles, organic fibers such as cellulose, synthetic fibers, etc., or heat generated by mixing metal particles or carbon pitch with a synthetic resin binder to form a sheet. Body body 1 or a ripened body obtained by applying a carbon paste (a mixture of a synthetic resin binder, carbon particles and a solvent) to a base sheet (for example, glass cloth), or a carbon pitch formed of a synthetic resin binder Aged body 1, which is obtained by applying the mixture kneaded with the material to a plastic sheet as a base material, or indium (I n), tin dioxide (S nO ₂ ) or indium of -'s (S n O _e> combination with heating the: sheet-like Hatsujuku body 1 (heat-generating body to the heat generating layer, such as tin dioxide on a substrate sheet or a plastic sheet is formed with a there is a 1 "such as _β Then, the positive overflow coefficient characteristic layer 3 having the positive overflow coefficient characteristic includes conductive carbon particles and metal particles in resins such as bororefin, Ionoma Kazuki, and fluororesin (vinylidenefluoride resin). Is included to have a positive coefficient characteristic. In such a case, the carbon particles include furnace black, channel black, acetylene black, etc. The carbon particles are contained in an amount of 4 to 50% by weight. * The amount of carbon particles varies depending on the characteristics of the carbon particles to be used. For example, polyethylene, ethylene copolymer, polyester, fluorocarbon resin, fluoro rubber, acrylic rubber, polyvinyl chloride, and other polymers, clay, talc , Silicon dioxide, C. algae earth, pumice powder, carbon fibre, anthracite powder, artificial quartz stone, a certain amount of filler such as Siri force and conductive carbon black, etc. When the electrode 2 is attached to the positive S degree coefficient characteristic layer 3 having the positive temperature coefficient characteristic or the egress degree coefficient characteristic layer 3 is attached to the ripened body 1, it is necessary to perform the crimping or the contact which does not hinder the conductivity. It is recommended to attach with a bonding agent. * Also, after attaching the electrode 2 and the accuracy coefficient characteristic layer 3, the resin forming the Is preferred. For this purpose, there are an electron probe, a bridge made of an organic oxide, and the like. As the heating element A, as shown in FIG. 3, a positive temperature coefficient characteristic layer 3 is formed on one surface of the heating element body. A conductive electrode 2 may be formed thereon with a silver paste 5 or the like. Also, as shown in FIG. 4, the entire ripened body A is covered (sealed) with a plastic 曆 6. * Also, the positive temperature coefficient characteristic layer 3 may be attached to the ripening body 1 by ripening and pressing, or it may be attached by another method that does not hinder the conductivity. It is possible (for example, the sewing machine may be used as long as the conductivity is not impaired). * Electrification to the electrodes 2 is performed from the leads 7 derived from the electrodes 2, respectively. The heater of the main body may be a metal wire, metal hairpin, etc.

 As described above, by connecting the conducting electrode 2 and the heating element main body 1 having conductivity with the positive coefficient characteristic layer 3 having positive coefficient characteristics, the positive temperature coefficient The current is applied to the mature body 1 through the characteristic eyebrows 3 so that the mature body 1 is colored.

When the overflow of the correct S-degree coefficient characteristic layer 3 rises to the set temperature range by the S-degree coefficient characteristic, the electrical resistance increases sharply according to the positive humidity coefficient, and the flow to the correct-degree coefficient characteristic eyebrow 3 increases. It suppresses the amount of compress, and consequently reduces the current supply to the ripening body 1, further suppresses the immersion of the germinating body 1 and thus controls the S degree control of the heating body 1. This is performed in the positive S degree coefficient characteristic layer 3.However, the controller that performs S degree control as usual and a rise prevention device are omitted, the overall configuration is simplified, handling is simplified, and cost is reduced. However, since the merchandise level is increased and the filling degree control is performed by the positive overflow coefficient characteristic layer 3 in the area # 2, the ripening body 1 has a positive temperature coefficient characteristic as long as the conventional one. By repeatedly using fS, there is no variation in the degree distribution, and the width of the heating element body 1 is increased. It made uniformly control the temperature distribution in which it has become possible to form a Hatsujuku body 1 of 耰広 * (Experiment Ϊ)

 A conductive ribbon paste is applied to a glass cloth substrate sheet with a screen stamp to form a heating element main body 1 which ripens when energized by 300 «mX 1000» ». A ripened body was formed by combining the electrodes 2 via a positive coefficient characteristic layer having a positive coefficient coefficient characteristic in both widthwise directions on one side of the main body i. As the paste, LR-5060 (Surface resistance 1 600ΩΖ mouth) made by Resinocolor Industries as well as -50-50 (Surface resistance 100 Ω / mouth) made by Resino Color Industry, LR-5050ZLR— 5060-33% / 6 7% At a viscosity of 2 Ot: and printed at 193 ps on a glass cloth by screen printing. In this case, the surface resistance was 550 Ω. The LR-5050 solid used for the above was 40% [Carbon black filler (Ketchin black 10 graphite) 20%, polyester 2% 1 and S-carbitol acetate 60% used as a solvent. * In addition, LH-5060 has a solid content of 40% [Carbon black filler (Ketchin black + Graphite) 16%, polyester It is a combination of 24% 3 and 60% of carbitol group acid used as a solvent.

 A voltage of AC 100 V was applied to the above ripened body, and the S degrees at points ①, ②, ③, ④, and ① of ripening shown in Fig. 5 were examined. * In FIG. 6, the vertical axis indicates the temperature, and the vertical axis indicates the communication time after applying the voltage. * In FIG. 6, E) indicates the room.

 However, as is clear from FIG. 6, the degree of variation of the degree of each part was about 4 to 5, and local ripening to the extent that hot spots and hot lines were generated did not occur. Industrial applicability

As described above, the ripening body according to the present invention comprises a controller In fields where various ripening bodies that had been controlled at a high temperature using a preventer were used, instead of a controller and a rise prevention device, the S temperature was controlled by a positive temperature coefficient characteristic layer. It can be used as a heating element for areas where heating elements were used, especially ceilings, floors and floors.

Claims

The scope of the claims 1. A ripening body, characterized in that a current-carrying electrode and a conductive heating element main body are connected by a positive temperature coefficient characteristic calendar having a positive temperature coefficient characteristic.  2. The heating element according to claim 1, wherein the heating element body is a planar ripening body.  3. The heating element according to claim 1 or 2, wherein the heating element body is formed by mixing and mixing a textile mixed with carbon fibers or metal particles and an organic fiber inorganic ferrous iron.  4. The ripened body according to claim 1 or 2, wherein the heating element body is constituted by mixing metal particles or carbon into a synthetic resin binder.  5. The heat generating body according to claim 1 or 2, wherein the heat generating body is formed by applying a carbon paste to a glass cloth base sheet.  6. The heat-generating body according to claim 1 or claim 2, characterized in that the ripened body is indium or tin dioxide or a combination of indium and tin dioxide.  7. The ripening according to claim 1, characterized in that the resin layer having a positive temperature coefficient characteristic is inserted. Body, 8. The ripened body _{β according} to claim 1 or claim 2 or claim 3 or claim 4 or claim 5 or claim 6 or claim 7 wherein the heating element is covered and sealed.