JP5063516B2 - Heating unit and heating device - Google Patents

Description

  The present invention relates to a heating element unit used as a heat source of a heating means and a heating device using the heating element unit, and particularly uses a heating element formed of a carbon-based material as a main component and formed into a sheet as a heating element. The present invention relates to a heating element unit having excellent heat generation characteristics as a heat source and a heating device using the heating element unit.

  Patent Document 1 discloses a long and thin carbonaceous heating element used in a conventional heating element unit. The carbonaceous heating element disclosed in Patent Document 1 has a length connecting between terminal portions for supplying electric power to the carbonaceous heating element, that is, in a thin long carbonaceous heating element shown in Patent Document 1, between both ends. A plurality of slits formed by laser processing from one side edge to a position before the other side edge are arranged on each of a pair of side edges facing each other along the direction so as to be orthogonal to the longitudinal direction. It is installed. The plurality of slits respectively formed on one side edge and the plurality of slits respectively formed on the other side edge face each other and are disposed adjacent to each other in the longitudinal direction, that is, in a staggered position. ing. The slits arranged in a staggered manner change the electrical resistance value of the entire heating element by deciding the interval width between adjacent slits that become current-carrying portions (hereinafter referred to as current flow paths) to a desired length. Yes.

Patent Document 2 discloses a belt-shaped heating element made of carbon fiber and extending in the longitudinal direction. The heating element made of carbon fiber disclosed in Patent Document 2 has a longitudinal center line extending from one side edge to the pair of side edges facing each other along the longitudinal direction so as to be orthogonal to the longitudinal direction. A plurality of cuts are formed in the direction. These cuts are formed so as not to cut the heat generation region which is a current flow path in the vicinity of the center line in the longitudinal direction. As a result, a region formed between the cuts excluding the heat generation region is formed as a heat dissipation region.
JP 2006-049088 A JP 2007-103292 A

  In the configuration of the first conventional example disclosed in Patent Document 1, the carbonaceous heating element has a wavy current channel having a substantially uniform channel width by providing a zigzag slit in the longitudinal direction. Is formed as a heat generating region, and a heat generating portion is formed. In this way, within the limited plate surface area of the heating element, we are trying to increase the power consumption by providing a slit that does not cause a short circuit or discharge phenomenon, and the length of the current flow path as much as possible. If the body material does not have a predetermined rigidity, the heating element is bent by the slit and twisted, which may cause a problem in quality such as a short circuit or a discharge phenomenon.

  Further, in the second conventional example disclosed in Patent Document 2, the heat generating element is a heat generating area which is a current flow path in the vicinity of the center line in the longitudinal direction and a region formed between the notches excluding the heat generating area. However, since the boundary between the heat-generating area and the heat-dissipating area is unclear in the heat-dissipating part formed by notches or openings, the resistance value varies in the longitudinal direction of the heat-generating element, and the resistance value is set accurately. This is difficult and causes problems in product design. Further, due to the influence of the variation in the resistance value, temperature variation occurs in the heat dissipation region, and thermal stress occurs, and in the worst case, the carbon fiber constituting the heating element may be disconnected.

  The present invention solves the problems in the conventional example, and has a sheet-like heating element with a high thermal conductivity having a structure in which a carbon-based material is a main component and laminated in the thickness direction and is isotropic in the plane direction. It is possible to obtain an arbitrary resistance value that is stable within the limited area of the heating element by forming a current blocking portion by applying stress in the thickness direction. It is another object of the present invention to provide a heating element unit that can obtain an accurate resistance value as a heating element and has a large heat dissipation effect by combining and arranging current blocking portions.

In order to solve the conventional problem, a heating element unit according to the first aspect of the present invention includes:
A belt-shaped heating element composed of a sheet-like material mainly composed of a carbon-based material that generates heat when a voltage is applied to both ends in the longitudinal direction;
A holder for clamping the end of the heating element;
A power supply member for supplying power to both ends of the heating element;
A heating element unit composed of a heating element, a holder and a container containing a power supply member,
The heating element is formed by laminating a plurality of layers while forming gaps in the thickness direction, and a current blocking part that controls a current flowing through each of the laminated layers is formed ,
The current inhibition part has a first current inhibition part that inhibits current flowing in the longitudinal direction of the heating element by being stressed in the thickness direction of the heating element,
The first current-inhibiting portion is formed to extend toward a side edge facing each other along a pair of side edges facing each other along the longitudinal direction of the heating element, and the longitudinal direction of the heating element Are arranged with a predetermined arrangement interval at each side edge, and a tip portion extending from each side edge has a predetermined width with respect to the band width direction orthogonal to the longitudinal direction. By forming a conduction path, the conduction path is a first current inhibition part that becomes a current path formed along the longitudinal direction,
Between the one first current inhibition part, located in the center of the band width of the heating element and parallel to the one first current inhibition part with a predetermined arrangement interval The other first current inhibition portion that extends toward the both side edges and is formed leaving a conduction path on each of a pair of opposite side edges of the heating element,
A pair of opposing opposite sides of the heating element located in the central part of the band width of the heating element between the one first current inhibition part arranged in the portion of the heating element located in the vicinity of the holder By providing the other first current inhibition part formed leaving the conduction path on the edge side, and forming the other first current inhibition part to become shorter as approaching the holder, The width of the conduction path located at least on one side of the both side edges is configured to increase as it approaches the holder . The heating element unit according to the first aspect of the present invention configured as described above can provide a heating element unit that can obtain a stable arbitrary resistance value and serves as a long-life heat source. Further, the heating element unit according to the first aspect of the present invention configured as described above can obtain a stable arbitrary resistance value within a limited heating element area and provide a high-capacity heating element. It becomes possible. Further, the heating element unit according to the first aspect of the present invention configured as described above is provided in the longitudinal direction of the heating element in the other first current inhibition portion arranged at the center of the band width of the heating element. Since it has strength against tension and has elastic characteristics due to shape deformation, it always follows the expansion and contraction of the heating element generated by the thermal cycle, and can prevent the heating element from being cut. Furthermore, the heating element unit according to the first aspect of the present invention configured as described above is configured such that the width of the conduction path in the other first current inhibition portion gradually increases as the holder approaches, Dispersing stress during impact and vibration can prevent the heating element from being cut and is also effective in preventing twisting of the heating element.

Heat generating unit of the second aspect of the present invention, during the said heating element first current blocking portions arranged on part of the one located in the vicinity of the holder in the first aspect, heating The other first current inhibition portion formed by leaving a conduction path on each of the pair of opposite side edges of the heating element located at the center of the band width of the body, and one of the first currents By forming the length from the side edge of the inhibition portion to the extending tip of the one first current inhibition portion extending from the side edge as a starting point, the length becomes shorter as approaching the holder, The width of the conduction path located on one of the both side edges becomes wider as it approaches the holder. In the heating element unit according to the second aspect of the present invention configured as described above, the width of the conduction path located on the extended distal end side of the first current inhibition portion gradually increases as the holder approaches. Therefore, it is possible to prevent the heating element from being cut by dispersing stress during dropping, impact, and vibration, and also to prevent twisting of the heating element.

The heating element unit according to the third aspect of the present invention is
A belt-shaped heating element composed of a sheet-like material mainly composed of a carbon-based material that generates heat when a voltage is applied to both ends in the longitudinal direction;
A holder for clamping the end of the heating element;
A power supply member for supplying power to both ends of the heating element;
A heating element unit composed of a heating element, a holder and a container containing a power supply member,
The heating element is formed by laminating a plurality of layers while forming gaps in the thickness direction, and a current blocking part that controls a current flowing through each of the laminated layers is formed,
The current inhibition part has a first current inhibition part that inhibits current flowing in the longitudinal direction of the heating element by being stressed in the thickness direction of the heating element,
The current inhibition part is formed to extend in the center of the heating element in the band width direction orthogonal to the longitudinal direction of the heating element, and to be arranged in a plurality with a predetermined interval along the longitudinal direction. The first current inhibition portion and the second current inhibition portion connected to the first current inhibition portion at both extending tips of the first current inhibition portion and extending in the longitudinal direction Are arranged in parallel with one or a plurality of rows of current blocking portions formed by applying stress in the thickness direction of the heating element. In the heating element unit according to the third aspect of the present invention configured as described above, a part of the current flowing in the longitudinal direction of the heating element becomes the current flowing in the band width direction of the heating element by the second current blocking portion. Since this is hindered, a current path through which a stable current flows can be secured. Further, in the heating element unit according to the third aspect of the present invention configured as described above, the first current inhibition part and the second current inhibition part are formed at a position where distortion is hardly generated with respect to the heating element. Therefore, it is possible to provide a heating element unit having excellent stability against twisting and deformation of the heating element.

The heating element unit according to the fourth aspect of the present invention is:
A belt-shaped heating element composed of a sheet-like material mainly composed of a carbon-based material that generates heat when a voltage is applied to both ends in the longitudinal direction;
A holder for clamping the end of the heating element;
A power supply member for supplying power to both ends of the heating element;
A heating element unit composed of a heating element, a holder and a container containing a power supply member,
The heating element is formed by laminating a plurality of layers while forming gaps in the thickness direction, and a current blocking part that controls a current flowing through each of the laminated layers is formed,
The current inhibition part has a first current inhibition part that inhibits current flowing in the longitudinal direction of the heating element by being stressed in the thickness direction of the heating element,
Wherein the current inhibiting unit may extend toward the other side edge opposite from at least one side edge of a pair of side edges facing each other of the band width direction of the heating element which is orthogonal to the heating element longitudinal direction and A plurality of the first current inhibition portions arranged with a predetermined arrangement interval along the longitudinal direction of the heating element, and the extended distal end portions of the first current inhibition portions, A second current inhibition portion connected to the first current inhibition portion is formed by applying stress in the thickness direction of the heating element. In the heating element unit according to the fourth aspect of the present invention configured as described above, a part of the current flowing in the longitudinal direction of the heating element becomes the current flowing in the plate width direction of the heating element by the second current blocking portion. Since this is hindered, a current path through which a stable current flows can be secured.

A heating element unit according to a fifth aspect of the present invention provides the first current-inhibiting portion according to the fourth aspect with a predetermined arrangement interval along the longitudinal direction of the heating element on each opposite side edge of the heating element. A plurality of second current-inhibiting portions that are substantially communicated with the first current-inhibiting portion at the extended distal ends of the first current-inhibiting portions. Each is formed, and a second current inhibition portion directed to one side edge side and a second current inhibition portion directed to the other side edge side are arranged in a staggered manner along the longitudinal direction. In the heating element unit according to the fifth aspect of the present invention configured as described above, since the second current inhibition portions are arranged in a staggered manner along the longitudinal direction, a more stable resistance value can be set. As a result, it is possible to provide a heating element unit with less variation in the temperature distribution of the heating element.

Other aspects heat generating unit of the present invention, the arrangement interval indicating the separating distance next to each other the respective first current-inhibiting portion provided on the same side edge along a longitudinal direction of the heating element in the viewpoint L2 And the separation distance L1 next to each of the second current blocking portions provided at the extending tip of the first current blocking portion, L1 / L2 = 0.2 to 0.9. It is. The heat generating unit according to the present invention constructed as is, it is possible to provide a heat generating unit which can realize efficient heat radiation.

Other aspects heat generating unit of the present invention, in the aspect, the forming the first current inhibition at a portion of the heating element located in the vicinity of the holder, the said first current blocking portions The extending tip is extended in a direction away from the holding portion, and is extended so as to be bent so as to be inclined in a direction of reducing the width of the energization region formed between the opposing second current blocking portions. By doing so, the current in the energized region is controlled. The heat generating unit according to the present invention constructed in this manner, provides eliminate long lifetime heat generating unit that local thermal stress is applied to the heating element by the holding member near Motas temperature gradient It becomes possible to do.

Heat generating unit of another aspect of the present invention, the heating element located in the vicinity of the retainer in the aspect, at least one side edge of a pair of side edges facing each other along the longitudinal direction of the heat generating element A plurality of the first current-inhibiting portions extending from the side edge to the other side edge facing each other with a predetermined arrangement interval along the longitudinal direction. By forming the length of the first current inhibition portion extending to the starting point to the extended distal end portion so as to approach the holder, the length of the first current inhibition portion on the extended distal end side of the first current inhibition portion is increased. width of the conductive paths of which are positioned so that the spreading toward the said retainer. Because the heat generating unit according to the present invention constructed in this manner, the width of the conductive paths located extending設先end side of the first current blocking portions as it approaches the retainer gradually wider, falling In addition, it is possible to prevent the heating element from being cut by dispersing stress upon impact and vibration, and also to prevent twisting of the heating element.

Other aspects heat generating unit of the present invention, the heating element in the aspect is configured to have a two-dimensional isotropic thermal conductivity in the plate surface direction. The heat generating unit according to the present invention constructed as is, it is possible to provide a heat generating unit as a heat source of long life.

Other aspects heat generating unit of the present invention, the heating element in this aspect is a laminated thickness 300μm following sheet by a film sheet. The heat generating unit according to the present invention constructed in this manner, it is possible to change the resistance value by adjusting the number of film sheet material to be laminated, it is easy to control power consumption.

Other aspects heat generating unit of the present invention, the container in the point of view, is either glass tube or a ceramic tube having a heat resistance, a structure in which an inert gas sealed inside the container. Because the heat generating unit according to the present invention constructed in this manner, the inert gas sealed in the container, it is possible to suppress the reaction between the components such as oxygen of the heating element and the air that occurs in the energized time and the like, the quality Will be guaranteed. If the heating element is a material that reacts with components such as oxygen in the air and easily burns even when the heating element generates heat at a low temperature, the inert gas enclosed in the container can generate heat at a high temperature.

The heating apparatus of the other viewpoint of this invention is a heating apparatus which has a heat generating body unit in the said viewpoint . Heating apparatus according to the present invention constructed in this manner, by the effect of the heat generating unit as a heat source of stable any long life resistance can be obtained, it becomes stable in quality.

  In the heating element unit of the present invention, a sheet material heating element formed in a state where a sheet material mainly composed of a carbon-based material is laminated in the thickness direction is used as the belt-like heating element. By applying a stress in the thickness direction to form the current inhibition portion, it is possible to provide a heating element in which the resistance value of the entire heating element can be easily adjusted. Accordingly, it is possible to provide a heating element unit that has a good heat dissipation effect in the thickness direction, a small temperature variation, and a long life.

Hereinafter, preferred embodiments of a heating element unit according to the present invention will be described in detail with reference to the accompanying drawings.
(Embodiment 1)
The heating element unit according to the first embodiment of the present invention will be described below with reference to FIGS. In the heating element unit according to the first embodiment, the heating element has a layer mainly composed of a carbon-based material, and a plurality of the layers are stacked while forming voids in the thickness direction of the layer. The sheet material is formed in a belt-like shape that has a pair of opposed band surfaces. Further, a first current inhibiting portion that inhibits the current in the longitudinal direction of the heating element is formed in the heating element.

  FIG. 1 is a perspective view of the heating element unit according to the first embodiment. A heating element 1 made of a flexible sheet material formed in a strip shape (that is, a sheet-like heating element 1) is formed inside a cylindrical container 6 made of heat-resistant quartz glass or the like. It is located in the space, and the longitudinal direction of the heating element 1 and the longitudinal direction of the container 6 are disposed so as to face each other. At both ends of the heating element 1, holders 3 each having a circular or polygonal cross section for holding the both ends by clamping or the like are arranged. For example, the holder 3 is divided into two along the thrust axis, and the end of the heating element 1 is held, for example, by the end of the heating element 1 being held between two divided surfaces formed by the two divisions. The Rukoto.

  The holder 3 engages with a part of the inner diameter space located on the inner diameter side of the coil-shaped part 4 having spring property formed at one end of the power supply member 5 and is held by the coil-shaped part 4. The coil-shaped portion 4 is held while applying pressure in a direction perpendicular to the thrust axis of the holder 3 to the holder 3, whereby the holder 3 and the power supply member 5 are electrically connected and the holder 3 The end of the heating element 1 engaged with the recess is held by the holder 3 while being crimped by the holder 3. Further, in other portions of the internal space that do not engage with the holder 3 of the coil-shaped portion 4, tension is applied to the heating element 1 held by the holder 3 so that a tensile force is always applied in the longitudinal direction of the heating element 1. is doing.

  In addition, holding | maintenance of the edge part of the heat generating body 1 with the holder 3 is not limited to the said structure, The edge part of the heat generating body 1 should just be hold | maintained with the holder 3. FIG. For example, by providing a hole in the end of the heating element 1 and engaging a locking projection provided in the holder 3 in the hole, the end of the heating element 1 is locked and held by the holder 3. Or you may make it hold | maintain with the holder 3 by filling the clearance gap between the edge part of the heat generating body 1 and the holder 3 with an adhesive agent.

  In addition, the electrical connection between the holder 3 and the power supply member 5 is performed by winding with the coil-shaped portion 4 having a spring property, but is not limited to this configuration, and is directly or indirectly connected to the heating element 1. Any configuration may be used as long as power can be supplied to the device. In addition, the other part of the coil-shaped portion 4 formed on a part of the power supply member that does not engage with the holder 3 is the ends of the heating element 1 depending on conditions such as the configuration, use state, and arrangement state of the heating element unit. It is not necessary to arrange in a part, and you may provide only in the one end part side of the heat generating body 1. FIG.

  Further, the other part of the coil-shaped portion 4 formed on a part of the power supply member that does not engage with the holder 3 does not necessarily have the same diameter as that of the holder 3. The diameter of the heating element 1 may be adjusted to have an effect of regulating the position of the heating element 1. Conversely, the heating element unit configuration, for example, the heating element 1 and the container 6 are not necessarily required unless they contact each other. It becomes.

  The container 6 is welded at an intermediate position of the power supply member 5 so that the heating element 1, the holder 3, the coil-shaped portion 4, and a part of the power supply member 5 are located in the internal space. The space is sealed. Each end of the power supply member 5 led out from both ends of the container 6 is used as a terminal for supplying external power to the heating element 1. Air is removed from the sealed internal space of the container 6, and an inert gas such as argon gas, nitrogen gas, or a mixed gas of argon gas and nitrogen gas is sealed instead.

  The heating element 1 includes a first current-inhibiting portion 2 (shown in FIG. 2) that extends perpendicular to the band width direction of the heating element, that is, the longitudinal direction of the heating element 1 and extends in a direction parallel to the band surface of the heating element. The first current inhibition part 2 is formed so as to extend in the band width direction of the heating element 1. In FIG. 1, the heating element 1 is used as the first current inhibition part 2. Are located on a pair of opposing side edges located in the band width direction, extending from the side edges toward the band width center portion, and facing on the same line perpendicular to the longitudinal direction of the heating element 1. The pair of first current inhibition portions 2a formed so as to be positioned and the first current inhibition portion 2b formed so as to extend toward the both side edges in the central portion of the band width generate heat. Along the longitudinal direction of the body 1, they are alternately arranged with a predetermined arrangement interval. Thus, by providing the pair of first current inhibition portions 2a and the first current inhibition portions 2b alternately, it is possible to obtain a stable arbitrary resistance value within the limited area of the heating element 1. It becomes possible to provide a heating element unit having a capacity.

  Next, the detail of the heat generating body 1 used for Embodiment 1 which concerns on this invention is demonstrated. The heating element 1 is a strip-shaped sheet material, and the sheet material has a pair of opposed layer surfaces. The sheet material has flexibility and has a carbon-based material as a main component, and in the thickness direction, the surface of the layer is substantially opposed to the belt surface of the heating element 1 in a shape such as a straight line or a wave. Are positioned in a state where a plurality of layers are stacked while forming voids between the surface of the layers. The image of the formation state of the gap formed between each layer and the layer surface of each layer is folded so as to overlap a plurality of times (for example, tens of times, hundreds of times). It can be said that the cross-sectional shape of the pie obtained by baking the pie dough is similar. That is, the cross-sectional shape cut | disconnected in the thickness direction of a sheet | seat material will form a space | gap in the position where the layer surface of an adjacent layer joins irregularly and does not join.

  With this configuration, on the surface of the band surface, a characteristic excellent in two-dimensional isotropic property, which is a characteristic in which heat conduction in all directions is equivalent at any location, is exhibited. In addition, as the heat generating body 1 of Embodiment 1, it is desirable that at least the required thermal conductivity has a characteristic of 200 to 400 W / m · k. Preferably, the characteristic becomes a higher value. Further, the conductivity of the sheet material, that is, each layer is the ratio of the conductivity in the direction perpendicular to the layer surface (layer thickness direction) to the conductivity in the direction along the layer surface (layer surface direction) (hereinafter referred to as a conductivity comparison value). Is more preferably 1/10 or less.

  Examples of the sheet material serving as a heating element in the first embodiment are polyoxadiazole, polybenzothiazole, polybenzobisthiazole, polybenzoxazole, polybenzobisoxazole, poly (pyromellitimide), poly (phenyleneisophthalate). Amide), poly (phenylene benzimitazole), poly (phenylene benzobisimitazole), polythiazole, polyparaphenylene vinylene, a polymer film comprising at least one type of phosphate ester, At least one selected from calcium phosphate, polyester, epoxy, stearic acid, trimellitic acid, metal oxide, organic tin, lead, azo, nitrone and sulfonyl hydrazide compounds Of filler and 2400 Was heat-treated at in more atmosphere, a highly oriented graphite film sheet having a fired to graphitized heat resistance.

  This graphite film sheet becomes a material having a thermal conductivity in the plane direction of 600 W / mK or higher, and has a characteristic that the conductivity comparison value is 1/10 or lower. In addition, since this graphite film sheet undergoes high-temperature heat treatment, the filler is gasified to generate a uniform foamed state in the graphite film sheet, so that the foamed space becomes a void, and there are a plurality of layers surrounding the void. It becomes a laminated layer.

  Next, the 1st electric current inhibition part formed in the heat generating body 1 is demonstrated using FIG. FIG. 2 is a cross-sectional view illustrating a first shear cross-sectional shape example when the first current inhibition portion is formed. By using the graphite film sheet as the heating element 1, the formation of the first current inhibition portion 2 of the heating element 1 which is a feature of the present invention can be more effectively formed.

  First, FIG. 2 shows an upper position of the heating element 1 formed in a belt-like shape (an upper position in FIG. 2) using a V-shaped metal blade 10 (two-dot broken line in the figure) having an acute angle at the tip. ) Located on the lower side (the lower position in FIG. 2) opposite to the one opposite surface (hereinafter referred to as the upper band surface). Immediately after a plurality of stacked layers formed on the heating element 1 are sheared by the blade 10, stress is applied toward the belt surface), and the blade 10 stops shearing and the upper initial position is reached. The space formed by the blade 10 is formed as the first current inhibition part 2. At this time, the layer or layers located at the lower tip of the first current inhibition portion 2 formed on the lower belt surface of the heating element 1 are in the initial position where they were connected before shearing due to the repulsive force. The return contact portion 1b is returned approximately. However, the cutting end portion of the return contact portion 1b is sheared by the tip end portion 10b of the blade 10 and then crushed by the side wall surface inclined portion 10a of the blade 10 so that the stress is applied along the side wall surface inclined portion 10a of the blade 10. Since the shape is bent downward, which is the direction, the cutting end portions of the return contact portions 1b located adjacent to each other by the return are stressed with respect to the cut end surfaces of the adjacent return contact portions 1b. The upper layer surface will be substantially in contact. As a result, the flow of current is suppressed due to the characteristics having a conductivity ratio of 1/10 or less.

Further, as the first current inhibition portion 2, a space having a distance away from the current so as not to flow current is formed by the blade 10 in a portion positioned above the return contact portion 1b. The side edge of the first current inhibition part 2 located in this space, that is, the cutting edge of the layer from the opening peripheral part 1a on the upper belt surface side of the heating element that starts shearing by the blade 10 to the vicinity of the return contact part 1b, In the same manner as the cutting end face of the return contact portion 1b, after being sheared at the tip 10b of the blade 10, it is crushed by the side wall surface inclined portion 10a of the blade 10, and downward along the side wall surface inclined portion 10a of the blade 10. It becomes a bent shape, in particular, a shape in which the vicinity of the opening peripheral portion 1a is greatly bent. As a result, the current flow is surely suppressed from the space of the first current inhibition unit 2, so that the current can be easily controlled. Next, referring to FIG. Sectional drawing in the shear cross-sectional shape example is shown. The difference between the second example in FIG. 3 and the first example in FIG. 2 is that heat is applied to the heating element 1 by applying stress from the upper band surface to the lower band surface, that is, from the upper side to the lower side, using the blade 10. The state in which the blade 10 is moved upward after the body 1 is sheared is shown. At this time, the heating element 1 is completely sheared by the blade 10 and is adjacent. In addition, the cut end faces of the return contact portions 1c positioned along the layer surface direction are located at a distance where electrical contact cannot be made. Accordingly, since the first current blocking unit 2 can cut off the current with the band thickness direction of the heating element 1 as a non-contact portion, the current flow can be more reliably suppressed than in the first example, so that the current control can be performed. Will be more certain.

  Next, FIG. 4 shows a cross-sectional view of a third shear cross-sectional shape example of the first current inhibition portion 2. The difference between the second example in FIG. 3 and the first example in FIG. 2 is that the heating element 1 is partially sheared by the blade 10 instead of the return contact portion 1b and is not partially sheared. Is left at a position below the first current inhibition 2. That is, as the first current inhibition part 2, a space having a distance away from the current so as not to flow in an upper part except the contact part 1d located on the lower belt surface side is formed by the blade 10. Is formed. Further, the side wall of the first current inhibition portion 2 located in this space, that is, the cut end portion of the layer from the opening peripheral portion 1a on the upper band side of the heating element that starts shearing by the blade 10 to the vicinity of the contact portion 1d. 2 is sheared at the tip end portion 10b of the blade 10 after being sheared at the side wall surface inclined portion 10a of the blade 10 in the same manner as the side wall of the first current inhibition portion 2 in FIG. It becomes the shape bent downward along the part 10a, and becomes a shape where the opening part peripheral part 1a vicinity was especially bent greatly. As a result, the flow of current is reliably suppressed from the space of the first current inhibition portion 2, and the current value can be adjusted by adjusting the thickness of the contact portion 1d, so that the current can be easily controlled.

  As described above, the shear cross-sectional shape of the first current inhibition portion has been described in the cases of FIGS. 2, 3 and 4. In any case, the present invention can be provided with a current inhibition portion. The heating element 1 includes a layer mainly composed of a carbon-based material, and a flexible sheet material formed by laminating a plurality of layers while forming voids in the thickness direction of the layer. Preferably, a material having excellent thermal conductivity in a two-dimensional equal direction in the plane direction is used. By using the heating element 1 as the above material, even if the heating temperature is partially increased in the contacting return contact portion 1b of FIG. 2 or the non-sheared contact portion 1d of FIG. Thus, no heat is generated locally.

  Furthermore, in order to improve the quality of the heating element 1 or to bring out the characteristics according to the application, the first current inhibition unit 2 of the present invention has one of the shear shapes shown in FIG. 2, FIG. 3, and FIG. It may be formed by selectively using them, or may be formed by mixing any of the shear shapes shown in FIGS. For example, the shear cross-sectional shape of FIG. 2 is selected for the portion where the resistance value of the heating element is to be increased, and the shearing cross-sectional shape of FIG. 3 is selected for the portion where the resistance value is to be increased. Conversely, the resistance value of the heating element is decreased. Since the desired heat distribution can be obtained by selecting the shearing cross-sectional shape of FIG. 4 for the desired portion, it can be adopted for various applications.

  Here, an example of the shearing method of the first current inhibition part 2 will be described. For example, a mold having a sharp blade shape such as a Thomson type, a pinnacle type, or a rotary die cutter is used, and a predetermined pattern and dimensions are used in advance. It can be easily formed by using a cutting means that is formed and sheared while applying stress (= pressure) in the thickness direction. The shearing state shown in each of FIGS. 2, 3, and 4 formed as described above controls the movable height of the blade 10, changes the height of the blade 10, or changes the height of the tip of the blade 10. A desired shear state can be obtained by arbitrarily selecting the angle. Furthermore, even when the shearing state is partially changed, it goes without saying that the height of the blade 10 can be arbitrarily changed, or the angle of the tip of the blade 10 can be arbitrarily selected.

  Moreover, since there exists a possibility that the heat generating body 1 may be damaged depending on the thickness or shear pattern of the heat generating element 1, it is preferable to dispose a holding sheet below the heat generating element 1 in consideration of workability and handling. Furthermore, it is more preferable to shear after placing a cover sheet on top of the heating element 1 in order to prevent poor finish accuracy due to contamination of foreign matter. That is, when using a holding sheet or cover sheet, the height during shearing is accurately controlled to shear only the heating element (normal half-cut press), or at least one of the holding sheet or cover sheet generates heat. You may shear the body together.

  In addition, although the sharp blade shape has been described as an example of the shearing method of the current-inhibiting portion 2, the sharp blade shape is not necessarily required, and if the same effect as described above can be obtained, it can be added by pressing, roller processing, or the like. It is also possible to press.

  Incidentally, as a shearing means for forming the first current blocking portion 2, a processing means such as laser processing or press working can be considered. However, if there is a need to select a point where all the heating elements can be used effectively due to the fact that there is no punching residue, It is better to select the cutting means described in the example.

  Next, a first embodiment of the current inhibition portion formed in the heating element 1 in FIG. 1 will be described with reference to FIGS. FIG. 5 is a plan view showing a first embodiment of the current blocking portion, and FIG. 6 is a front view of FIG. FIG. 7 shows the end of the heating element 1 in the first embodiment of the current blocking portion shown in FIG. 5, and FIG. 8 is a front view of FIG.

  5 and 6, in order to inhibit the current A flowing in the longitudinal direction of the heating element 1 (indicated by an arrow with a two-dot chain point), two types of current inhibition portions are formed on the heating element. First, as one first current inhibition part 2a, on the same line orthogonal to the longitudinal direction of the heating element 1 from each of a pair of opposite side edges positioned in the band width direction of the heating element 1 having the band width W1. While facing each other, they extend in the direction of the other side edges facing each other, that is, toward the central part of the band width W1 of the heating element 1, and the free ends of the central part do not separate from each other and come into contact with each other. A central side conduction path having a predetermined width W2 is formed as one of the conduction paths. The other first current blocking portion 2b may be positioned on the central side that is not located near the side edge of the heating element 1, but in the present embodiment, it is positioned at the central portion of the band width W1 of the heating element 1. Thus, the current A is generated by extending toward the both side edges so as to be parallel to the first current inhibition portion 2a and stopping the extension of the heating element 1 to a pair of opposite side edge portions. Edge-side conductive paths having a width W3 that is ½ of the flowing width W2 are formed on both side edges as another one of the conductive paths. Furthermore, the first current inhibition part 2a and the first current inhibition part 2b are alternately arranged along the longitudinal direction of the heating element 1, and are formed to be arranged at an arrangement interval having the arrangement width W4. ing. In the present embodiment, the arrangement width W4 and the width W3 of the edge-side conduction path are formed with the same dimensions, and consideration is given to reducing variation in the amount of heat generation. In the drawing, the first current blocking portion in the drawing is illustrated as a “notch” having a gap, but the actual shape is any one of FIGS. 2, 3, and 4 described above. (Hereinafter, the same applies to the drawings described later).

  When a rated current A is passed through the heating element 1 from both ends of the heating element 1, a center-side conduction path having a width W2 located at the center of the heating element 1 formed by the first current inhibition part 2a. Then, the current A flows, and the current A is distributed to A / 2 in the conduction path of each width W3 provided on both side edges by the first current inhibition portion 2b formed between the first current inhibition portions 2a. Because it flows, it will meander and flow. The resistance value of the entire heating element 1 at this time can be easily and accurately calculated from the total length of the meandering flow, the first current blocking portion 2a, the width W3 of the edge-side conduction path, the arrangement width W4, and the like. Further, due to the high thermal conductivity of the heating element 1, the whole reaches a uniform and stable temperature instantly. Although it depends on the thermal conductivity of the heating element 1, heat distribution is possible even if the width W3 is ½ or less of W2 if the thermal conductivity in the surface direction is a material having a characteristic of 600 W / mK or more, for example. Since (temperature distribution) is not affected, the width W3 is not necessarily ½ of W2 when heat distribution (temperature distribution) is prioritized. However, if the width W3 is about 1 mm, there is a possibility that the edge-side conduction path formed at both side edges of the heating element of the first current inhibition portion 2b may be cracked, and further, the heating element may be damaged. When forming the first current inhibition part 2a in the heating element 1, care must be taken in the design.

  7 and 8, as described in FIG. 1, the end of the heating element 1 is electrically connected to the holder 3 that holds the end of the heating element 1 and the holder 3. And a coil-shaped portion 4 at one end of a power supply member 5 that supplies power to the heating element 1. The holder 3 is composed of conductive holders 3 a and 3 b that are divided into two so as to have a holding surface that faces and holds the belt surface of the heating element 1. Each holding surface of the holding bodies 3 a and 3 b facing each other. After the heating element 1 is inserted, the heating element 1 is held by winding around the holding bodies 3a and 3b with the coil-shaped portion 4 at one end of the power supply member being crimped. .

  In addition, the first current inhibition portion 2a and the first current inhibition portion are provided at the joint vicinity end of the heating element 1 that is not held by the holder 3 located in the vicinity of the joint held by the holder 3. By providing the heat radiation area 1F (shown by hatching) without 2b, the heat conducted from the heating element 1 to the holder 3 and the power supply part 5 is reduced, so that the heating element reduces thermal stress and Longer service life is possible.

  In addition, since the heating element 1 according to the first embodiment is a sheet having a carbon-based material as a main component, it can be easily processed. Accordingly, when the widths of the heating element 1 and the holder 3 are different, as shown in FIG. 7, the heating element 1 is hatched as shown by a 1e portion or the heating element 1 at the joint between the heating element 1 and the holder 3 as shown in FIG. The heating element 1 can be prevented from being damaged by forming a curved line projecting toward the center of the band width so that concentrated load is not applied, and a long-life heating element unit is possible. .

  Next, a second example of the current inhibition part in the first embodiment according to the present invention will be described with reference to FIG. FIG. 9 is a plan view showing a second embodiment of the current blocking portion, and the difference from the first embodiment shown in FIG. 7 is that it is formed in the portion of the heating element located in the vicinity of the holding portion. The first current hindering part 2a or the first current hindering part 2b is formed in a different size and shape depending on the formed position.

  In FIG. 9, first, the width W2 (W2a, W2b, W2c, W2d) of the conduction path formed between the tips of the free ends of the pair of first current inhibition portions 2a facing each other formed on the heating element 1 is set. The length of the first current blocking portion 2a is gradually shortened to form the width dimension of the width W2 of the conduction path as W2a as it is formed at the end of the heating element 1 or the position closer to the holder 3. It gradually becomes wider (larger) so that <W2b <W2c <W2d. As a result, the closer to the end of the heating element 1 or the holder 3, the resistance value of the heating element 1 gradually decreases in the conduction path width W <b> 2 and is conducted from the heating element 1 to the holder 3 and the power supply unit 5. Therefore, the heat generating element 1 can reduce thermal stress and extend its life. In addition, since the area of the conductive path near the holding portion is gradually increased, the stress generated during dropping, vibration, and impact is dispersed to prevent the heating element 1 from being cut and to prevent the heating element from being twisted and to have a long service life. Can be realized.

  Furthermore, the other first current inhibition part 2b located at the center of the band width W1 of the heating element 1 is located between the free end of the first current inhibition part 2b and both side edges of the heating element 1, respectively. As the width W3 (indicated by W3a, W3b, W3c, and W3d) of the edge side conduction path is formed at the end of the heating element 1 or at a position approaching the holder 3, the length of the first current inhibition portion 2b is increased. The width dimension of the width W3 of the edge side conduction path is gradually made wider (larger) so that W3a <W3b <W3c <W3d. As a result, similar to the width W2 of the conduction path, the resistance value of the heating element 1 gradually decreases in the width W3 of the edge-side conduction path as the distance from the end of the heating element 1 or the holder 3 decreases. The heat conducted from the heating element 1 to the power supply unit 5 is reduced, and the heating element 1 can reduce thermal stress and extend its life. In addition, since the area of the conductive path near the holding portion is gradually increased, the stress generated during dropping, vibration, and impact is dispersed to prevent the heating element 1 from being cut and to prevent the heating element from being twisted and to have a long service life. Can be realized. In addition, it is usually more preferable to gradually increase the width W2 of the conduction path and the width W3 of the edge-side conduction path as they are formed near the end of the heating element 1 or the holder 3. Needless to say.

  Further, each portion of the conduction path consisting of widths W2a, W2b, W2c, W2d located at the center of the heating element 1 formed between the free ends of the pair of opposed first current inhibition parts 2a and the heating element 1 Width W3a located respectively on both sides of the heating element 1 formed between the free end part of the first current inhibition part 2b and both side edges of the heating element 1 , W3b, W3c, W3d, and the gap between each part of the edge-side conduction path and the holder 3 positioned at the end of the heating element 1 must be the same dimension at both ends of the heating element 1. There is no. For example, in the heating device in which the longitudinal direction of the heating element unit, that is, the heating element 1 is arranged in the vertical direction with respect to the floor, the temperature of the heating device top surface becomes high. The current inhibition part 2a or the first current inhibition part 2b reduces the temperature rise of the coiled part 4 of the power supply member 5 and the welded part of the container 6 by widening the gap with the holder 3, and is safe and has a long life. It becomes possible to obtain the heating device.

  Next, a third example of the current inhibition unit in the first embodiment according to the present invention will be described with reference to FIG. FIG. 10 is a plan view showing a third embodiment of the current inhibition portion. The difference from the first embodiment shown in FIG. 5 is that the first current inhibition formed in the central portion of the heating element 1. That is, the second current inhibition part 7a that inhibits the current flowing in the width direction of the heating element 1 is formed in the part 2b.

  In FIG. 10, a second current inhibition portion 7 a is formed so as to be orthogonal to the first current inhibition portion 2 b formed in the central portion of the heating element 1. In the present embodiment, the second current inhibition portion 7a is located on the longitudinal center line of the heating element 1 located at the center of the band width W1 of the heating element 1, and extends along the longitudinal center line. It is installed. The second current inhibition portion 7a is formed on the both side edges of the heating element by the first current inhibition portion 2b, with the current A flowing from the conduction path having the width W2 formed by the first current inhibition portion 2a. In other words, it is divided into two so as to flow to the edge-side conduction path having the width W3, and each is distributed to A / 2. As a result, the current A flowing from the conduction path having the width W2 formed between the first current inhibition portions 2a is guided to the current formed between the first current inhibition portion 2a and the first current inhibition portion 2b. When the current flows through the passage W4 evenly by A / 2, the resistance value is stabilized and uniform heat distribution can be realized, and a safe and long-life heating device can be realized.

  Although FIG. 10 illustrates the case where the second current blocking portion 7a is disposed at the center of the band width W1 of the heating element 1, it is not always necessary to be positioned at the center of the band width W1 of the heating element 1. For example, FIG. In FIG. 10, when the second current blocking portion 7a is arranged and adjusted downward or upward from the center of the band width W1 of the heating element 1, the edge guide that forms a width W3 located above the drawing is formed. The resistance value of the passage is different from the resistance value of the edge side conduction path forming W3 located in the lower part of the figure. As a result, it is possible to change the temperature distribution between the edge-side conduction path located above and the edge-side conduction path located below, enabling desired heat distribution / light distribution and realizing a high-capacity heating element unit. be able to.

  In FIG. 10, the width W5 in the longitudinal direction of the heating element 1 of the second current inhibition portion 7a has been described as being substantially the same as the arrangement width W4 or the width W3, but it is not necessarily the same. That is, by adjusting the width dimension of the width W5, for example, by making the width W5 longer than the arrangement width W4 or the width W3, the resistance value becomes more stable and uniform heat distribution becomes possible.

In the second current inhibition part 7a, as described above, the arrangement adjustment of the heating element 1 in the band width W1 direction and the width adjustment of the width W5 in the longitudinal direction of the heating element 1 have been described separately. Needless to say, each effect is obtained.
(Embodiment 2)
A heating element according to the second embodiment of the present invention will be described below with reference to FIGS. The configuration as the heating element unit is the same as that of the first embodiment shown in FIG. 1, and the same parts are denoted by the same reference numerals and the description thereof is omitted. The difference is that the current inhibition part formed in the heating element 1 is different. Hereinafter, a fourth example of the current inhibition part will be described with reference to FIG. FIG. 11 is a plan view showing a fourth embodiment of the current inhibition part.

  In FIG. 11, the heating element 1 having the band width W <b> 1 includes a pair of opposite side edges positioned in the band width direction, opposite to each other, i.e., the center of the band width W <b> 1 of the heating element 1. A portion having a width that is not cut between the distal ends that extend toward each other at the central portion, that is, a state in which the width of the central conduction path through which a current can flow is left, and A pair of first current inhibition portions 2a is formed so as to be opposed to each other on the same line orthogonal to the longitudinal direction of the heating element 1 through the center side conduction path. Furthermore, a plurality of the pair of first current inhibition portions 2a are arranged in parallel along the longitudinal direction of the heating element 1 with a predetermined arrangement interval L2, so that the first current inhibition portion 2a is arranged. Thus, the current flowing in the longitudinal direction of the heating element 1 is inhibited. Further, in order to inhibit the current flowing in the band width direction of the heating element 1, each free end of the pair of first current inhibition parts 2 a located on the same line is extended in the longitudinal direction of the heating element 1. By forming a pair of opposing second current inhibition portions 7a, a current-carrying region 8 having a width that allows predetermined heat generation due to the flow of current A2 between the opposing second current inhibition portions 7a (FIG. A hatched portion in the middle) is formed. In the present embodiment, the pair of second current inhibition portions 7a are extended in the longitudinal direction of the heating element with the same line as the symmetry axis so as to be positioned in parallel, and the free play of each first current inhibition portion 2a. Each is formed so as to be connected to and communicated with the tip of the end portion.

  As a result, a pair of T-shaped current-inhibiting portions that are located on the same line and that are formed of the first current-inhibiting portion 2a and the second current-inhibiting portion 7a are formed. At this time, each of the second current blocking portions 7a formed along the longitudinal direction of the heating element has an interval L1 that becomes an entrance through which the heat generated in the energizing region 8 is effectively conducted next to the longitudinal direction. A conductive port 16 having the following is formed. Therefore, the T-shaped current-inhibiting portions are arranged in two rows arranged on both side edges of the heating element along the longitudinal direction of the heating element 1, and each row has a plurality of T-shaped currents arranged intermittently. It consists of an inhibition part. The second current inhibition part 7a has the same shearing cross-sectional shape as the first current inhibition part 2a described in FIGS. 2, 3 and 4 and the forming means thereof.

  When a rated voltage is applied to both ends of the heating element 1, a pair of opposing, that is, regions located on both side edges of the heating element 1 from the two rows of the second current inhibition parts 7 a are the first current inhibition parts. The current A2 indicated by the arrow 2a does not flow due to 2a, but the current A2 flows only in the energized region 8 sandwiched between the two second row current-inhibiting portions facing each other. . On the other hand, the first current inhibition portion 2a and the second current inhibition portion 7a that are located on both side edges of the heating element 1 with respect to the two second rows of second current inhibition portions 7a facing each other and that are adjacent to each other with an interval L2. In the heat dissipation area 9 having the enclosed interval L2, heat generated in the energization area 8 is conducted through the conduction port 16 of the second current inhibition portion 7a as indicated by an arrow H1. Thus, by providing the energizing region 8 that generates heat by energization and the heat dissipating region 9 that conducts and dissipates heat generated in the energizing region 8, it is possible to obtain a high-capacity heating element and generate heat with a large heating area. The body can be obtained. In FIG. 9, the direction in which heat is transmitted is described in only one heat radiation region in the longitudinal direction of the heating element, but it goes without saying that heat conduction is performed in other heat radiation regions as well.

  Further, the relationship between the arrangement interval L2 of the first current inhibition portions in the longitudinal direction of the heating element 1 and the interval L1 of the second current inhibition portions in the longitudinal direction of the heating element varies depending on the material. By setting L2 = 0.2 to 0.9, the energization region 8 and the heat dissipation region 9 of the present invention can be obtained. For example, when L1 / L2 is smaller than 0.2, the heat generated by energization cannot be sufficiently conducted and effective heat dissipation cannot be obtained. Furthermore, a temperature difference occurs at the boundary between the energizing region 8 and the heat radiating region 9, and the heat generating element may be broken.

On the other hand, when L1 / L2 is larger than 0.9, a current flows also in the heat dissipation region, and a current larger than a current that should flow only in the energization region 8 flows. It becomes difficult to predict the value. Furthermore, the current-carrying region 8 between the two rows of the first current inhibition portions 2a facing each other in the width direction of the heating element 1 has a locally low resistance value, which may cause the heating element 1 to break due to thermal stress. . For example, the heating element 1 has a thickness t = 300 μm, a width W1 = 4.5 mm (a current-carrying region 1.5 mm, a heat-dissipation region 1.5 mm each), a length 300 mm, and a heat conductivity in the plane direction of 600 W / mK. The experiment was performed at a setting where the surface temperature of the energization region 8 of the body 1 was 1100 ° C. First, when L1 / L2 = 0.5, the minimum value of the surface temperature in the heat dissipation region 9 is 1060 ° C., which is lower than that of the energization region 8, and the temperature difference is 40 ° C. (3.6% with respect to 1100 ° C.). It was. Next, when L1 / L2 = 0.2, the minimum value of the surface temperature in the heat radiation region 9 is 990 ° C. lower than that in the energization region 8, and the temperature difference becomes 110 ° C. (10.0% with respect to 1100 ° C.). . The surface temperature variation of the heating element 1 is preferably within 10% as a product. Next, when L1 / L2 = 0.9, the minimum value of the surface temperature in the heat dissipation region 9 is 1080 ° C., which is lower than that in the energization region 8, and the temperature difference is 20 ° C. (1.8% with respect to 1100 ° C.). became. From the above, it is possible to obtain the current-carrying region 8 and the heat-dissipating region 9 of the present invention with L1 / L2 = 0.2 to 0.9, but the heat conductivity of the heat-generating member 1 and the shape of the heat-generating member 1 (thickness) In consideration of t, width W1, current-carrying region 8, and heat-dissipating region 9), it is preferable to design within a range of L1 / L2 = 0.3 to 0.8 so that an optimum resistance value and a heat generation temperature with less variation are obtained. The heating element having is obtained. Further, the interval L2 between the first current inhibition portions 2a does not necessarily have the same interval dimension over the entire heating element 1, and can be set as appropriate according to the product specification and application using the heating element unit.

  It should be noted that a part of the first current inhibition part 2a is missing, that is, is in a disconnected state, or a coupling part between the first current inhibition part 2a and the first current inhibition part 7a is formed in an unconnected state. Even in the case where the current to the current path formed in the heat radiation area 9 is small and hardly affects the heat generated by energization of the current-carrying area 8, or the resistance value setting is not difficult in designing the product, It can be interpreted as being in substantial communication.

  Next, a fifth example of the current inhibition unit in the second embodiment of the present invention will be described with reference to FIGS. 12 and 13. FIG. 12 is a plan view showing a fifth embodiment of the current inhibition portion, and FIG. 13 is a front view of FIG. The fifth embodiment is different from the fourth embodiment in that the first current blocking portion having a different shape is formed in the portion of the heating element located in the vicinity of the holding portion.

  12 and 13, at the distal end of the free end portion of the pair of first current inhibition portions 2a facing each other formed in the portion of the heating element located in the vicinity of the holder 3 that holds the end portion of the heating element 1. A second current inhibition portion 7b different from the second current inhibition portion 7a is formed. The second current inhibition portion 7b is a pair of second current inhibition portions 7a that are opposed to each other in the longitudinal direction of the heating element 1 that is separated from the holding portion, starting from the free end of the first current inhibition portion 2a. The energization region formed therebetween is formed so as to incline in a direction to reduce the width. Further, in the present embodiment, in order to draw out the operational effect due to the width of the energization region 8 and the interval L1, a pair of second current inhibition starting from the free end tip of each second current inhibition portion 7b. The portions 7a are formed so as to face each other. As a result, in the energization region located between the inclined second current inhibition portions 7b, the resistance value of the heating element 1 with respect to the holding portion 3 side direction located in the direction in which the energization region expands. Since the heat generating element 1 can be prevented from being damaged by heat stress, a long-life heat generating unit can be realized.

  In FIG. 12, the second current inhibition part 7b has a linear shape with a certain angle (intersection angle) with respect to the first current inhibition part 2a or the second current inhibition part 7a and is provided in the vicinity of the holder. Although the state is shown, the present invention is not limited to this, and the second current inhibition portion 7a may have a curved shape such as a gently curved surface protruding in the center direction of the band width of the heating element. That is, the resistance value of the heating element 1 is gradually increased with respect to the direction of the holding unit 3 that is positioned in the direction in which the energization region expands in the second current inhibition unit 7b. What is necessary is just to form so that the effect which changes so that it may become small may be acquired. For example, when a T-shaped current inhibition portion is formed by the first current inhibition portion 2a and the second current inhibition portion 7a as shown in FIG. 11, the holder of the second current inhibition portion 7a A second current inhibition portion 7b that is inclined starting from the tip of the free end on the 3 side is formed, and the second current inhibition portion 7b is in the longitudinal direction of the heating element 1 approaching the holder 3 and in the direction of the side wall of the heating element It may be formed so as to be inclined.

  Further, as described with reference to FIG. 7, the heating element 1 can be easily processed because it is in the form of a sheet mainly composed of a carbon-based material. Therefore, when the dimensions of the heating element 1 and the holder 3 in the width direction are different, as shown in FIG. 12, the heating element 1 is cut like a 1e portion at the joint between the heating element 1 and the holder 3 to generate heat. Damage to the body 1 can be prevented, and a long-life heating element unit is possible.

  Next, a sixth example of the current inhibition unit in the second embodiment of the present invention will be described with reference to FIG. FIG. 14 is a plan view showing a fourth embodiment of the current blocking portion. The sixth embodiment differs from the fourth embodiment shown in FIG. 11 in the band width direction of the heating element 1. The arrangement of the T-shaped current inhibition portion formed by the first current inhibition portion 2a and the second current inhibition portion 7a formed on each of the pair of opposing opposite side edges is the longitudinal direction of the heating element 1. It is arranged in a staggered pattern along the direction.

  In FIG. 14, the heating element 1 having the band width W <b> 1 has a pair of opposite side edges positioned in the band width direction, in the direction of the other side edges facing each other from both side edges, i.e., the heating element 1. Extending toward the central portion of the belt width W1, the portion having a width not cut between the ends extending from each other in the central portion, that is, the width of the central conductive path through which current can flow is left. In the state, the first current inhibition portions 2a are formed so as to face each other through the center-side conduction path in the center. A plurality of opposing first current inhibition portions 2a are arranged in parallel at a predetermined arrangement interval L2 along the longitudinal direction of the heating element 1, and the opposing first current inhibition portions 2a generate heat. They are alternately arranged along the longitudinal direction, that is, staggered so as not to be located on the same line perpendicular to the longitudinal direction of the body 1. In the present embodiment, they are arranged in a staggered manner with an interval of 1/2 of the arrangement interval L2.

  Furthermore, the first current inhibition part 2a facing each other has a predetermined arrangement interval L2 along the longitudinal direction of the heating element 1, and a plurality of them are arranged in parallel, thereby the first current inhibition part 2a. The current flowing in the longitudinal direction of the heating element 1 is inhibited by 2a. Moreover, the opposing 2nd electric current inhibition part 7a extended in the longitudinal direction of the heat generating body 1 is each formed in the front-end | tip of each free end part of the opposing 1st electric current inhibition part 2a, A current-carrying region 8 (hatched portion in the figure) having a width that allows predetermined heat generation by the flow of the current A2 is formed between the second current inhibition portions 7a. In the present embodiment, the opposing second current inhibition portion 7a extends so as to be located on a parallel line parallel to the longitudinal direction, and is coupled to the tip of the free end of each first current inhibition portion 2a. Each is formed so as to communicate.

  As a result, the T-shaped current inhibition portion composed of the first current inhibition portion 2a and the second current inhibition portion 7a is arranged in parallel on both opposite side edges, and is arranged in parallel on the both side edges. The T-shaped current inhibition portion thus arranged is staggered with the T-shaped current inhibition portion located on the other side edge. Note that two rows of the second current inhibition portions 7a arranged in parallel along the longitudinal direction of the heating element are adjacent to the longitudinal direction, and the interval at which the heat generated in the energizing region 8 is effectively transmitted. A conduction port 16 having L1 is formed. Therefore, the T-shaped current blocking portions arranged on both side edges are arranged in two rows arranged in a staggered manner along the longitudinal direction of the heating element 1, and each row has a plurality of T-shapes arranged intermittently. It is composed of the current inhibition part. As a result, a heat radiating region 9 having the length of the arrangement interval L2 surrounded by the T-shaped current blocking portion is formed on both side edges, and the heat radiating region 9 conducts heat from the conduction region 8 through the conduction port 16. Will be.

  According to the configuration described above, the sixth example of the current inhibition unit in the second embodiment of the invention shown in FIG. 14 and the fourth example of the current inhibition unit in the second embodiment of the present invention shown in FIG. The difference is that in the fourth embodiment, the heat conduction from the energizing region 8 to the heat radiating region 9 is in the same phase in the band width direction of the heating element 1, whereas the fourth embodiment is arranged on both side edges. Since the T-shaped current-inhibiting portions are arranged in two rows in a staggered manner along the longitudinal direction of the heating element 1, the heat conduction from the current-carrying region 8 to the heat-dissipating region 9 is caused by the band of the heating element 1. It becomes a different phase in the width direction. That is, since the two rows of heat radiation areas 9 arranged on both side edges are located in a staggered manner, and the conduction ports 16 that allow heat conduction from the current-carrying area 8 to the heat radiation areas 9 on both side edges are also located in a staggered fashion. The resistance value variation in the longitudinal direction of the heating element 1 becomes uniform, and a more stable resistance value can be set. Furthermore, the conduction position from the conduction port 16 to the heat radiating region 9 is diffused, and there is no variation in the temperature distribution of the current-carrying region 8 and the entire heating element 1, but a heating element unit can be realized.

  As in the fourth embodiment shown in FIG. 11, the interval L2 between the conduction ports 16 of the first current blocking portion 2a is not necessarily the same interval over the entire heating element 1, and a heating element unit is used. It can be set as appropriate according to the product specifications and applications. Further, it is not always necessary that the first current inhibition portion 2a has a length extending from the first current inhibition portion 7a to the side edge in the width direction of the heating element 1, and the first current inhibition portion 2a communicates in the longitudinal direction of the heating element. If the current path does not become a current path, the length of the first current inhibition part 2a is missing, that is, even if there is a place where the part located on the side edge side of the first current inhibition part 2a remains in the state of the current path. The effect of the invention is not affected.

  Next, a seventh example of the current inhibition unit in the second embodiment of the present invention will be described with reference to FIG. FIG. 15 is a plan view showing a fifth embodiment of the current blocking portion. The seventh embodiment differs from the fourth embodiment shown in FIG. 11 in the band width direction of the heating element 1. In the pair of opposing T-shaped current inhibition portions formed by the first current inhibition portion 2a and the second current inhibition portion 7a respectively formed at the pair of opposing opposite side edges, the length of the heating element The width of the conduction region formed between the second current inhibition portions 7a facing each other in the direction is gradually changed.

  In FIG. 15, the T-shaped current-inhibiting portions are arranged in two rows arranged on both side edges of the heat-generating body 1 along the longitudinal direction of the heat-generating body 1, and part of the T-shaped current-inhibiting portions. Since the width of the conduction region formed between the opposing second current inhibition portions 7a constituting the gradual change gradually changes the opposing second current inhibition portions 7a in the direction of the side edge where each is located. The first current inhibition part which constitutes another part of the T-shaped current inhibition part while changing the separation distance between the opposed second current inhibition parts 7a, that is, the width of the conduction region, by moving. The length of 2a is changed according to the movement of the second current inhibition part 7a. In the drawing, the width of the conduction region is different from the width of the conduction region 8 of the heating element 1 in the above configuration. On the other hand, on the right side, that is, at a position where the width of the energization region 8 is wide, the resistance value of the energization region 8 decreases. That is, since the same current flows through the heating element 1 as a whole, the resistance on the left side is high because the resistance is high, and conversely on the right side, the resistance is low and the temperature is low, and a continuous temperature distribution according to the position. Can be formed. That is, a desired temperature distribution can be realized in the longitudinal direction of the heating element to be used.

  As in the fourth embodiment shown in FIG. 11, the arrangement interval L2 of the first current blocking portions 2a does not necessarily have to be the same interval over the entire heating element 1, and the product specifications using the heating element unit and It can be set as appropriate according to the application. Further, it is not always necessary that the first current inhibition portion 2a has a length extending from the first current inhibition portion 7a to the side edge in the width direction of the heating element 1, and the first current inhibition portion 2a communicates in the longitudinal direction of the heating element. If the current path does not become a current path, the length of the first current inhibition part 2a is missing, that is, even if there is a place where the part located on the side edge side of the first current inhibition part 2a remains in the state of the current path. The effect of the invention is not affected. Furthermore, it goes without saying that, as in the fourth embodiment shown in FIG. 12, two rows of opposing second current inhibition portions 7a can be arranged alternately or staggered in the longitudinal direction of the heating element 1. .

  Next, an eighth example of the current inhibition unit in the second embodiment of the present invention will be described with reference to FIG. FIG. 16 is a plan view showing an eighth embodiment of the current inhibition portion.

  In FIG. 16, the heating element 1 whose band width W1 changes at the same inclination along the longitudinal direction has a direction of the other side edge facing each other than a pair of opposite side edges located in the band width direction, that is, heat generation. A portion extending in a direction orthogonal to the longitudinal direction of the body 1 and having a width not cut between the distal ends of the heat generating member 1 extending from each other, that is, a center-side guide through which a current can flow A pair of first current blocking portions 2a are formed so as to face each other on the same line perpendicular to the longitudinal direction of the heating element 1 with the width of the passage remaining and through the center-side conduction path in the center. Has been. Furthermore, a plurality of the pair of first current inhibition portions 2a are arranged in parallel along the longitudinal direction of the heating element 1 with a predetermined arrangement interval L2, so that the first current inhibition portion 2a is arranged. Thus, the current flowing in the longitudinal direction of the heating element 1 is inhibited. In order to inhibit the current flowing in the band width direction of the heating element 1, the separation distance between the free ends of the pair of first current inhibition parts 2 a located on the same line is made constant in the longitudinal direction of the heating element 1. Is set to A pair of opposing second current inhibition portions 7a extending in the longitudinal direction of the heating element 1 are equally separated from the free ends of the pair of first current inhibition portions 2a located on the same line. By being formed at a distance, a current-carrying region 8 (shaded portion in the figure) having a constant width that allows predetermined heat generation due to the flow of the current A2 is formed between the opposing second current inhibition portions 7a. It is formed.

  In the above configuration, the width of the current-carrying region 8 of the heating element 1 is constant, but the width of the heat-dissipating region 9, that is, the heat-dissipating area is different. On the other hand, on the right side, since the area of the heat radiation region 9 is narrow, the heat radiation amount becomes small. That is, the same current flows through the heating element as a whole, but on the left side the heat dissipation is large and the temperature is low, and on the right side the heat dissipation is small and the temperature is high and the temperature distribution is continuous depending on the position. Can be formed. Similar to the seventh embodiment shown in FIG. 15, a desired temperature distribution can be realized in the longitudinal direction of the heating element to be used.

  As in the fourth embodiment shown in FIG. 11, the arrangement interval L2 of the first current blocking portions 2a does not necessarily have to be the same interval over the entire heating element 1, and the product specifications using the heating element unit and It can be set as appropriate according to the application. Further, it is not always necessary that the first current inhibition portion 2a has a length extending from the first current inhibition portion 7a to the side edge in the width direction of the heating element 1, and the first current inhibition portion 2a communicates in the longitudinal direction of the heating element. If the current path does not become a current path, the length of the first current inhibition part 2a is missing, that is, even if there is a place where the part located on the side edge side of the first current inhibition part 2a remains in the state of the current path. The effect of the invention is not affected. Furthermore, it goes without saying that, as in the sixth embodiment shown in FIG. 14, two rows of opposing second current inhibition portions 7 a can be arranged alternately or staggered in the longitudinal direction of the heating element 1. . Furthermore, if there is a purpose such as desire for non-uniform change in the heat distribution in the longitudinal direction of the heating element, the band width W1 does not need to change at the same inclination along the longitudinal direction, and the side edge shape of the heating element is changed. Various shapes such as a curved surface as well as a straight line can be adopted. In this case, it can be realized by adjusting the length of the first current inhibition portion 2a.

Further, it goes without saying that the two rows of the second current inhibition portions 7a can be alternately arranged in the longitudinal direction of the heating element 1 as in the sixth embodiment shown in FIG.
(Embodiment 3)
A heating element according to the third embodiment of the present invention will be described below with reference to FIGS. The configuration as the heating element unit is the same as that of the first embodiment shown in FIG. 1, and the same parts are denoted by the same reference numerals and the description thereof is omitted. Further, the difference is that the current blocking portion formed in the heating element 1 is different. Further, the difference from the fourth example of the current inhibition part in the second embodiment shown in FIG. 11 is that the shape and arrangement of the current inhibition part formed in the heating element 1 are different. The ninth embodiment of the current inhibition unit will be described below with reference to FIG. FIG. 17 is a plan view showing a ninth embodiment of the current inhibition portion.

  In FIG. 17, the first current inhibition part 2b extending in the direction orthogonal to the longitudinal direction of the heating element 1 and the opposing second current inhibition formed respectively at both ends of the first current inhibition part 2b. A plurality of H-shaped current-inhibiting portions composed of the portion 7a are arranged in a single row by being arranged in the longitudinal direction of the heating element 1 and positioned in the center of the band width W1 of the heating element 1. Yes. That is, the first current inhibition portion 2b is the same as that shown in FIG. 5 and is located at the center of the band width W1 of the heating element 1 and both end portions in the direction perpendicular to the longitudinal direction of the heating element 1. Is extended, and a marginal distance is left between the extended both ends and both side edges of the heating element 1 so that the both ends are not extended. Further, a plurality of the first current inhibition portions 2b are arranged in a single row by being arranged in a plurality with a predetermined arrangement interval L2 along the longitudinal direction.

  At both ends of the plurality of first current inhibition portions 2b arranged in parallel, a pair of second current inhibition portions 7a facing each other with the first current inhibition portion 2b positioned in the middle are free ends. Are formed so as to extend in the longitudinal direction of the heating element 1, and a blank area is provided between each side edge of the heating element 1 and the pair of second current inhibition parts 7 a having the margin distance. The blank area becomes an edge side conduction path through which the current A2 flowing from both ends of the heating element flows. And this edge side conduction path becomes the electricity supply area | region 8 where heat generate | occur | produces with the electric current A2. In the present embodiment, the pair of second current inhibition portions 7a are evenly extended in the longitudinal direction of the heating element with the first current inhibition portion 2b as the axis of symmetry so as to be positioned in parallel to each other, and each first Each of the current inhibition portions 2a is connected to the end portion of the current inhibition portion 2a so as to communicate with the first current inhibition portion 2a. Further, a conduction path is provided by providing a non-connection distance between the second current inhibition portions 7a positioned along the longitudinal direction of the heating element 1 so as not to be connected to the free end of the adjacent second current inhibition portion 7a. Are formed, and each conduction path has a heat dissipation region surrounded by adjacent H-shaped current blocking portions where the generated heat generated in the energization region 8 is located with a predetermined arrangement interval L2. 9 is a conduction port 16 having a distance L1 that becomes an entrance (indicated by an arrow H2) that is effectively conducted.

  With the above configuration, the heat generated in the energized region 8 by energization is conducted from the energized region 8 to the heat radiating region 9 as shown by the arrow H2 in the figure, and the heat radiating region 9 reaches a certain temperature and goes outward. The heat is dissipated. In this way, by providing the energizing region 8 portion that generates heat by energization and the heat dissipation region 9 that conducts heat generated in the energizing region 8 and generates heat, a high-capacity heating element can be obtained, and the energizing region 8, Since the heating element communication portions are located on both sides of the heating element 1 in the width direction, it is possible to obtain a heating element that is resistant to twisting and has mechanical strength against breakage during processing and assembly.

  The relationship between the arrangement interval L2 of the first current inhibition portions 2b in the longitudinal direction of the heating element 1 and the interval L1 of the conduction port 16 formed by the second current inhibition portion 7a in the longitudinal direction of the heating element is as follows. Depending on the material, by setting L1 / L2 = 0.2 to 0.9, the energization region 8 and the heat dissipation region 9 of the present invention can be obtained. For example, when L1 / L2 is smaller than 0.2, the heat generated by energization cannot be sufficiently conducted and effective heat dissipation cannot be obtained. Furthermore, a temperature difference occurs at the boundary between the energized region 8 and the discharge region 9, and the heat generating element may be broken. On the other hand, when L1 / L2 is larger than 0.9, a current flows also in the heat radiating region 9, and a current larger than a current that should flow only in the current-carrying region 8 flows. It becomes difficult to predict. In addition, although it is possible to obtain the energization region 8 and the heat dissipation region 9 of the present invention at L1 / L2 = 0.2 to 0.9, it is preferable that L1 / L2 = 0.3 to 0.8. By designing, a heating element having an optimum resistance value and a heat generation temperature with little variation can be obtained. Further, the arrangement interval L2 of the first current blocking portions 2b is not necessarily the same interval over the entire longitudinal direction of the heating element 1, and can be appropriately set according to the product specification and application using the heating element unit. Further, it is not necessary that all of the first current inhibition portions 2b are formed between the first current inhibition portions 7a, and even if there is a missing portion unless the current path communicates in the longitudinal direction of the heating element. The effect of the present invention is not affected.

  Next, a tenth example of the current inhibition unit in the third embodiment of the present invention will be described with reference to FIG. FIG. 18 is a plan view showing a tenth embodiment of the current blocking portion. The tenth embodiment differs from the ninth embodiment shown in FIG. 17 in that it is orthogonal to the longitudinal direction of the heating element 1. H-shaped current inhibition portion comprising a first current inhibition portion 2b extending in the direction to be opposed and opposing second current inhibition portions 7a respectively formed at both ends of the first current inhibition portion 2b Are located on the same line perpendicular to the longitudinal direction of the heating element 1 and are formed in two rows on the center side of the heating element 1 so as to face each other with the longitudinal center line of the heating element 1 positioned in the middle. . Further, the two rows of H-shaped current inhibition portions are arranged in parallel along the longitudinal direction of the heating element 1.

  That is, each of the two rows of H-shaped current inhibition portions is the same as that shown in FIG. 17, and the first current inhibition portion 2 b that is a part of the H-shaped current inhibition portion is the heating element 1. Both end portions are extended in a direction perpendicular to the longitudinal direction of the heating element 1 so that they are positioned on the same line perpendicular to the longitudinal direction of the heating element 1 and the longitudinal center line of the heating element 1 is positioned in the middle so as to face each other. The heating element 1 is formed in two rows in the width direction of the heating element 1 by being positioned on the center side of the heating element 1. A marginal distance on the side edge side where the end portion is not extended is left between both side edges of the heating element 1 and the end portions of the first current inhibition part 2b facing the both side edges. A center-side margin distance is formed between the respective ends of the first current inhibition portions 2b facing each other with the center line in the longitudinal direction positioned in the middle. Further, each of the first current inhibition portions 2b arranged in two rows so as to be arranged in parallel has a plurality of single rows having a predetermined arrangement interval L2 along the longitudinal direction, and the single rows are They are arranged in parallel.

  A pair of second current inhibition portions 7a facing each other with the first current inhibition portions 2b positioned in the middle at both ends of each of the two rows of the first current inhibition portions 2b arranged in parallel. Are formed so that their free ends are extended in the longitudinal direction of the heating element 1. As a result, a marginal area on the side edge side is formed between the end of the second current inhibition part 7a having the marginal distance on the side edge side and the both side edges, and the longitudinal center line of the heating element 1 is formed. Is located in the middle, and a blank area on the center side is formed between the opposing second current inhibition portions 7a formed at each end of the opposing first current inhibition portion 2b. As a result, the margin area on the side edge side becomes an edge-side conduction path through which current A2 flowing from both ends of the heating element flows, and the margin area on the center side becomes a center-side conduction path through which current A2 flowing from both ends of the heating element flows. . And the said edge side conduction path and the center side conduction path become the electricity supply area | region 8 where a heat | fever generate | occur | produces with the electric current A2. In the present embodiment, the pair of second current inhibition portions 7a are equally extended in the longitudinal direction of the heating element with the first current inhibition portion 2b as the axis of symmetry so as to be positioned in parallel to each other, and It is formed so as to be coupled to the end of the first current inhibition portion 2a and to communicate with the first current inhibition portion 2a.

  Further, a conduction path is provided by providing a non-connection distance between the second current inhibition portions 7a positioned along the longitudinal direction of the heating element 1 so as not to be connected to the free end of the adjacent second current inhibition portion 7a. Are formed, and each conduction path has a heat dissipation region surrounded by adjacent H-shaped current blocking portions where the generated heat generated in the energization region 8 is located with a predetermined arrangement interval L2. 9 is a conduction port 16 having a distance L1 that becomes an entrance (indicated by an arrow H2) that is effectively conducted. With the above configuration, the effect of the ninth embodiment shown in FIG. 17 is obtained, and the heating element 1 has a high capacity and is resistant to twisting.

  Next, an eleventh example of the current inhibition unit in the third embodiment of the present invention will be described with reference to FIG. FIG. 19 is a plan view showing an eleventh embodiment of the current inhibition portion. The eleventh embodiment is different from the tenth embodiment shown in FIG. Are arranged in the middle of the heating element 1 in two rows so as to be opposed to each other, and a plurality of H-shaped current inhibition portions are arranged along the longitudinal direction of the heating element 1. In this case, the heating elements 1 are alternately arranged along the longitudinal direction, that is, staggered. That is, when two rows of H-shaped current blocking portions are arranged in a staggered manner in the longitudinal direction of the heating element 1 with the longitudinal center line of the heating element 1 positioned in the middle, The current inhibition portions are arranged with the arrangement interval L2, and the other H-shaped current inhibition portions adjacent to each other are arranged in a staggered manner with a half of the arrangement interval L2.

  With the above configuration, each heat radiation region 9 surrounded by the H-shaped current blocking portions adjacent to one row and the conduction port 16 provided in each heat radiation region 9 are adjacent to each other. Since each heat radiation region 9 surrounded by the H-shaped current blocking portion and the conduction ports 16 provided in each heat radiation region 9 are arranged in a staggered manner, the ninth embodiment shown in FIG. In addition, the variation of the resistance value in the longitudinal direction of the heating element 1 becomes uniform, and the resistance value can be set more stably. Furthermore, a heating element unit with less variation in heating element temperature distribution is possible.

  In the heating element used in the heating element unit according to the first to third embodiments of the present invention, the first current inhibition part 2a and the second current inhibition part 7a, or the first current inhibition part 2b. At the intersection of the second current inhibition portion 7a, R may be formed or a circular processed hole may be formed. By adopting these, it becomes possible to prevent microcracks generated due to thermal expansion and contraction of the heating element, and to extend the life of the heating element.

  The details of the heat generating unit of the first to third embodiments according to the present invention will be described above. The sheet-like heating element 1 has a thickness of 300 μm or less and a predetermined width and length, and various shapes are used according to the design specifications of the heating element unit. Further, the sheet-like heating element 1 is made of natural graphite or artificial graphite mainly containing carbon. Preferably, in the case of natural graphite, natural graphite mainly composed of crystalline graphite, and in the case of artificial graphite, artificial graphite mainly composed of crystalline graphite obtained by firing a polymer film. You may use what was pressurized or rolled as needed.

  Further, the sheet-like heating element 1 preferably has a thermal conductivity of 600 W / mK or more in the plane direction and 15 W / mK or more in the thickness direction. If the thermal conductivity is lower than this, a sufficient heat dissipation effect cannot be exhibited, and the heating element has a large temperature distribution variation.

  Further, in each embodiment, the holder for holding the heating element and the power supply member are made of a metal or carbon that is excellent in electrical conductivity and heat resistance, and excellent in machining or welding. Yes, preferably, a simple substance such as Mo, W, Pt, Ni, stainless steel C (carbon) or an alloy thereof or a plated one is used. These shapes are not particularly limited, and may be any of wire, plate, rod, metal foil, and the like.

  In the holder 3, a cylindrical carbon material is divided into two in the length direction so that the heating element can be held from above and below by being sandwiched, and sandwiched between the divided parts from above and below the heating element. Later, the coil-shaped portion provided at one end of the power supply member can be easily sandwiched by press-fitting. The shape or structure of the holder 3 is not limited, and any shape can be used as long as it can sufficiently hold the end of the heating element 1.

  In the power supply member 5, a lead wire (not shown) is connected to one end where a coil-shaped portion capable of holding the holder is provided and left. This coil-shaped portion not only absorbs the thermal expansion of the heating element 1 itself, but is also effective for securing a tensile force during assembly.

  In the heating element unit of each of the above-described embodiments, the container is made of glass having heat resistance and insulating properties, and is selected from glasses such as quartz glass, soda lime glass, borosilicate glass, and lead glass. .

In each of the above-described heating element units, the inert gas sealed in the container is a single substance or a mixture selected from argon, helium, neon, krypton, nitrogen, and the like.
(Embodiment 4)
The heating apparatus in Embodiment 4 which concerns on this invention is demonstrated below using FIG. FIG. 20 is a perspective view showing an example of a heating apparatus equipped with the heating element unit described in the first to third embodiments.

  In FIG. 20, a heating element unit 12 similar to the heating element unit 1 of the present invention described in the first to third embodiments is provided inside the apparatus that is the heating apparatus 11 for heating which is an example of the heating apparatus. Equipped with a temperature controller 13, a reflector 14, a protective cover 15 and the like. By applying a rated voltage to the heating element unit 12, a predetermined current flows through the heating element in the heating element unit 12 to generate heat, and the temperature rises. Due to the temperature control of the temperature controller 13, the temperature is kept constant. Here, a heating device for heating is shown as an example equipped with a heating element unit. However, the present invention is not limited to this. OA equipment such as a copier / printer equipped with a high-temperature heating element, a heating cooker. Needless to say, it can be used in dryers, humidifiers, and the like.

  The heating element unit according to the present invention uses a sheet-like heating element mainly composed of carbon having two-dimensional isotropic thermal conductivity in the plane direction, and inhibits current in the longitudinal direction of the heating element. By forming one current inhibition part and further a second current inhibition part that inhibits the current in the width direction of the heating element, the resistance value of the entire heating element can be easily adjusted, and temperature variation can be reduced. The heating element unit of the present invention is used for heating equipment for heating, OA equipment such as a copier / printer equipped with a high-temperature heating element, a heating cooker, a dryer, a humidifier, etc. It is.

The perspective view of the heat generating unit in Embodiment 1 of this invention. Sectional drawing which shows one state of the heat generating body of the heat generating body unit in Embodiment 1 of this invention. Sectional drawing which shows the other state of the heat generating body of the same heat generating unit. Sectional drawing which shows the further another state of the heat generating body of the same heat generating unit. The top view which shows the 1st Example of the heat generating body unit in Embodiment 1 of this invention. Front view showing the first embodiment The top view which shows the principal part of the 1st Example of the heat generating unit in Embodiment 1 of this invention. Front view showing the main part of the first embodiment The top view which shows the 2nd Example of the heat generating body unit in Embodiment 1 of this invention. The top view which shows the 3rd Example of the heat generating body unit in Embodiment 1 of this invention. The top view which shows the 4th Example of the heat generating body unit in Embodiment 2 of this invention. The top view which shows the 5th Example of the heat generating body unit in Embodiment 2 of this invention. Front view showing the fifth embodiment The top view which shows the 6th Example of the heat generating body unit in Embodiment 2 of this invention. The top view which shows the 7th Example of the heat generating body unit in Embodiment 2 of this invention. The top view which shows the 8th Example of the heat generating body unit in Embodiment 2 of this invention. The top view which shows the 9th Example of the heat generating body unit in Embodiment 3 of this invention. The top view which shows the 10th Example of the heat generating body unit in Embodiment 3 of this invention. The top view which shows the 11th Example of the heat generating body unit in Embodiment 3 of this invention. The perspective view which shows an example of the heating apparatus equipped with the heat generating body unit which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat generating body 1a Opening peripheral part 1b Return contact part 1c Return contact part 1d Contact part 2 Current inhibition part 2a First current inhibition part 2b First current inhibition part 3 Holder 3a Holder 3b Holder 4 Coil shape part DESCRIPTION OF SYMBOLS 5 Electric power supply member 6 Container 7a 2nd electric current inhibition part 7b 2nd electric current inhibition part 8 Current supply area 9 Heat radiation area 10 Cutlery 10a Side wall surface inclined part 10b Tip 16 Conduction port

Claims (5)

A belt-shaped heating element composed of a sheet-like material mainly composed of a carbon-based material that generates heat when a voltage is applied to both ends in the longitudinal direction;
A holder for clamping the end of the heating element;
A power supply member for supplying power to both ends of the heating element;
A heating element unit composed of a heating element, a holder and a container containing a power supply member,
The heating element is formed by laminating a plurality of layers while forming gaps in the thickness direction, and a current blocking part that controls a current flowing through each of the laminated layers is formed ,
The current inhibition part has a first current inhibition part that inhibits current flowing in the longitudinal direction of the heating element by being stressed in the thickness direction of the heating element,
The first current-inhibiting portion is formed to extend toward a side edge facing each other along a pair of side edges facing each other along the longitudinal direction of the heating element, and the longitudinal direction of the heating element Are arranged with a predetermined arrangement interval at each side edge, and a tip portion extending from each side edge has a predetermined width with respect to the band width direction orthogonal to the longitudinal direction. By forming a conduction path, the conduction path is a first current inhibition part that becomes a current path formed along the longitudinal direction,
Between the one first current inhibition part, located in the center of the band width of the heating element and parallel to the one first current inhibition part with a predetermined arrangement interval The other first current inhibition portion that extends toward the both side edges and is formed leaving a conduction path on each of a pair of opposite side edges of the heating element,
A pair of opposing opposite sides of the heating element located in the central part of the band width of the heating element between the one first current inhibition part arranged in the portion of the heating element located in the vicinity of the holder By providing the other first current inhibition part formed leaving the conduction path on the edge side, and forming the other first current inhibition part to become shorter as approaching the holder, A heating element unit configured such that the width of a conduction path located at least on one of the side edges is increased as the holding tool is approached . A pair of opposing opposite sides of the heating element located in the central part of the band width of the heating element between the one first current inhibition part arranged in the portion of the heating element located in the vicinity of the holder with the first current blocking portions of the other which is formed by leaving the respective edge conduits are provided, wherein one of the first extending starting from the side edge from the side edge of the first current blocking portions of the one The length of the current blocking portion to the extending tip is shortened as it approaches the holder, so that at least the width of the conduction path located on one of the side edges approaches the holder. The heating element unit according to claim 1 , wherein the heating element unit is spread. A belt-shaped heating element composed of a sheet-like material mainly composed of a carbon-based material that generates heat when a voltage is applied to both ends in the longitudinal direction;
A holder for clamping the end of the heating element;
A power supply member for supplying power to both ends of the heating element;
A heating element unit composed of a heating element, a holder and a container containing a power supply member,
The heating element is formed by laminating a plurality of layers while forming gaps in the thickness direction, and a current blocking part that controls a current flowing through each of the laminated layers is formed,
The current inhibition part has a first current inhibition part that inhibits current flowing in the longitudinal direction of the heating element by being stressed in the thickness direction of the heating element,
The current inhibition part is formed to extend in the center of the heating element in the band width direction orthogonal to the longitudinal direction of the heating element, and to be arranged in a plurality with a predetermined interval along the longitudinal direction. The first current inhibition portion and the second current inhibition portion connected to the first current inhibition portion at both extending tips of the first current inhibition portion and extending in the longitudinal direction When, the originating Netsutai unit provided with column one or a plurality parallel current-blocking portions that are formed respectively by adding stress in the thickness direction of the heat generating element. A belt-shaped heating element composed of a sheet-like material mainly composed of a carbon-based material that generates heat when a voltage is applied to both ends in the longitudinal direction;
A holder for clamping the end of the heating element;
A power supply member for supplying power to both ends of the heating element;
A heating element unit composed of a heating element, a holder and a container containing a power supply member,
The heating element is formed by laminating a plurality of layers while forming gaps in the thickness direction, and a current blocking part that controls a current flowing through each of the laminated layers is formed,
The current inhibition part has a first current inhibition part that inhibits current flowing in the longitudinal direction of the heating element by being stressed in the thickness direction of the heating element,
The current blocking portion extends from at least one side edge of the pair of side edges facing each other in the band width direction of the heating element perpendicular to the longitudinal direction of the heating element toward the other side edge; A plurality of the first current inhibition portions arranged with a predetermined arrangement interval along the longitudinal direction of the heating element, and the extended distal end portions of the first current inhibition portions, first second current blocking portions and, said heating element originating Netsutai unit formed respectively stress is added to the thickness direction of which is connected to a current inhibition of. A plurality of the first current inhibition portions are arranged on both opposite side edges of the heating element with a predetermined arrangement interval along the longitudinal direction of the heating element, and each of the first current inhibition portions is provided. A second current inhibition portion which is formed at the extended distal end portion of the first current inhibition portion and which is substantially communicated with the first current inhibition portion, and is directed to one side edge side. The heating element unit according to claim 4 , wherein the portion and the second current inhibition portion directed to the other side edge are arranged in a staggered manner along the longitudinal direction.

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