JP2009238564A - Heating element unit - Google Patents

Abstract

An object of the present invention is to provide a highly versatile heating element unit that is small in size, has high efficiency, has a long life, and can be easily adapted to various applications.
A heating element unit is configured to protect a first glass tube from a contaminant or the like by the second glass tube and a holding member. The reflector 16a is disposed in the gap between the second glass tube 9 and an elastic portion is provided in at least a part of the reflector 16a so as to reduce distortion of the reflector 16a due to thermal expansion. Yes.
[Selection] Figure 1

Description

The present invention relates to a heating element unit used as a heat source, and in particular, a cooker, a dryer, an electric heater, an electronic device (a copying machine, a facsimile machine) used in an environment affected by scattered matter from an object to be heated. In addition, the present invention relates to a heating element unit used in a printer.

The heating element unit used in conventional cookers, dryers, electric heaters, and electronic devices (including copiers, facsimiles, printers, etc.) can be used in an environment that is affected by scattered matter from the object to be heated. For this purpose, the heating element component is housed in the first internal space formed in the first heat transfer tube, and the first heat transfer tube is further formed in the second internal space formed in the second heat transfer tube. There is disclosed a heating element unit using a configuration housed in the housing. (For example, refer to Patent Document 1.) The conventional heating element unit configured as described above has a heating device configuration such as a cooker, a dryer, an electric heater, and an electronic device (including a copying machine, a facsimile, a printer, and the like). The upper heating element unit is also required to be downsized and highly efficient, and the space between the first heat-transmitting tube and the second heat-transmitting tube is required to be narrowed and the reflecting plate is required to be thin.
JP 2007-149649 A

  However, in the conventional configuration, the first heat transmission tube that houses the heating element component in the first internal space so as not to be affected by the scattered matter from the object to be heated, and further, the first heat transmission tube 2 is a heating element unit having a configuration in which a second heat-transmitting tube accommodated in the internal space 2 is provided, and a heating device such as a cooker, dryer, electric heater, electronic device (copy machine, facsimile, printer, etc.) However, it is required to be downsized as well as having a long life and high efficiency even in a severe use environment as a heating element unit due to the configuration of the heating device. That is, in the configuration of the conventional heating element unit having a double tube configuration, the gap between the first heat transmission tube and the second heat transmission tube is narrow, and the reflection disposed in the gap between the first heat transmission tube and the second heat transmission tube. The plate is also thin. Therefore, in the thin reflector, the temperature of the reflector itself rises (about 700 ° C.) due to the radiant heat from the heating element, and the reflection plate is wrinkled or damaged due to the distortion caused by the thermal expansion of the reflector. It had the problem of being damaged.

  The heating element unit of the present invention solves the conventional problems, and has a means for absorbing expansion and contraction of the reflecting plate to prevent wrinkles and breakage of the reflecting plate due to distortion caused by the thermal expansion of the reflecting plate itself. It is an object of the present invention to provide a heating element unit as a highly versatile heat source that has a long life as a body unit, is small and highly efficient, and can be easily adapted in various applications.

A heating element unit according to a first aspect of the present invention includes a heating element having a heating part, a holder attached to an end located in the longitudinal direction of the heating element, and electric power directly or indirectly to the heating element. Power supply member for supplying external power to the heating element, and a first heat permeable tube in which the heating element, the holder, and a part of the power supply member are arranged in a first internal space And a second heat transfer tube in which the first heat transfer tube is disposed in the second internal space, and the first heat transfer tube and the second heat transfer tube are disposed with a predetermined gap. A reflection member having a holding member provided on the reflector, a reflector disposed in a gap between the first heat-permeable tube and the second heat-permeable tube, and an elastic portion provided on the reflector, and The holding member, the first heat transfer tube, or the reflector so that the reflector is disposed at a predetermined position with respect to the heating element Those constituted by a position regulating portion provided directly or indirectly to at least one of the second diathermic tube.

  The heating element unit according to the first aspect of the present invention configured as described above absorbs the heat stress to the reflecting plate caused by the heat of the energized heating element by the elastic portion, so that the reflecting means is not damaged. Prevents high-efficiency and long-life heating element units.

  In the heating element unit according to a second aspect of the present invention, in the first aspect, the elastic portion of the reflecting member absorbs expansion and contraction in the longitudinal direction of the heating element. Since the heat generating unit according to the second aspect of the present invention configured as described above absorbs thermal stress to the reflecting plate generated in the longitudinal direction of the heat generating member by the elastic portion, it prevents the reflecting plate from being damaged. Enables a highly efficient and long-life heating element unit.

  In the heating element unit according to the third aspect of the present invention, in the first aspect or the second aspect, the elastic portion of the reflecting member has elasticity that absorbs expansion and contraction in the longitudinal direction of the heating element. An elastic member that is mechanically coupled to the reflector. The heating element unit according to the third aspect of the present invention configured as described above can freely select characteristics such as elastic force of the elastic member mechanically coupled to the reflector according to the specifications of the heating element. As a result, it is possible to prevent the reflector from being damaged, and thus it is possible to obtain a highly efficient and long-life heating element unit and to realize a heating element unit capable of regulating the position of the reflector.

  In the heating element unit according to the fourth aspect of the present invention, the reflecting plate is formed of a thin metal plate in the first to third aspects. The heat generating unit according to the fourth aspect of the present invention configured as described above can realize a heat generating unit with a long life and high efficiency.

  The heating element unit according to a fifth aspect of the present invention is the heating element unit according to the fourth aspect, wherein the reflecting plate is formed of a metal thin plate of nickel, stainless steel (ferrite, austenite, etc.) or nichrome. The heating element unit according to the fifth aspect of the present invention configured as described above can realize a highly efficient heating element unit with a long life.

  In the heating element unit according to the sixth aspect of the present invention, in the third aspect, the elastic member is formed by bending a plate material. The heating element unit according to the sixth aspect configured as described above can realize a highly efficient and long-life heating element unit that prevents the reflector from being damaged.

  In the heating element unit according to the seventh aspect of the present invention, in the third aspect, the elastic member is formed of a wire rod in a coil shape. The heating element unit according to the seventh aspect of the present invention configured as described above can realize a heating element unit that prevents damage to the reflecting plate, is highly efficient, has a long life, and can also regulate the position of the reflecting plate.

  In the heating element unit according to the eighth aspect of the present invention, in the sixth aspect to the seventh aspect, the elastic member is formed of a metal such as molybdenum, tungsten, nickel, stainless steel, or nichrome. . The heating element unit according to the eighth aspect of the present invention configured as described above can realize a heating element unit that prevents damage to the reflecting plate, is highly efficient, has a long life, and can also regulate the position of the reflecting plate.

  A heating element unit according to a ninth aspect of the present invention is the heating element unit according to any one of the first to eighth aspects, wherein the heating element includes a carbon-based material and the side wall formed along the longitudinal direction of the heating element. The reflecting surface of the reflecting member that forms a flat portion at least in part and that opposes the flat portion and reflects heat toward the heating element toward the back surface of the flat portion via the heating element. Is configured to be arranged. The heating element unit according to the ninth aspect of the present invention configured as described above has an effect of further enhancing the directivity of radiant heat from the heating element having directivity, and enables a highly efficient and long-life heating element unit. To do.

  A heating element unit according to a tenth aspect of the present invention is the heating element unit according to any one of the first to eighth aspects, wherein the heating element includes a carbon-based material and the side wall formed along the longitudinal direction of the heating element. A reflecting surface of the reflecting member that is formed at least in part and intersects a virtual extension surface of the planar portion and is reflected toward the heating element in the rear surface side direction of the planar portion is disposed. It is comprised so that. The heating element unit according to the tenth aspect of the present invention configured in this manner reflects the radiant heat from the directional heating element by the reflecting surface of the reflecting member, thereby reducing the directional range of the radiant heat. Since it can be spread, a wide range can be warmed, and a highly efficient and long-life heating element unit is possible.

  According to the heating element unit of the present invention, the elastic member that absorbs expansion and contraction of the reflecting plate is provided on the reflecting member, thereby preventing the reflecting plate from being wrinkled or damaged due to distortion caused by the thermal expansion of the reflecting plate itself. Thus, it is possible to provide a heating element unit as a highly versatile heat source that has a long life, is small and highly efficient, and can be easily adapted to various applications.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a heating element unit according to the present invention will be described with reference to the accompanying drawings.

(Embodiment 1)
The heating element unit according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view showing the structure of the heating element unit according to the first embodiment, FIG. 2 is a sectional side view when the adhesive in the ZZ cross section of the heating element unit is omitted, and FIG. FIG. 4 is a plan view showing the reflecting member, FIG. 5 is a plan view showing a different example of the reflecting member in the heating element unit, and FIG. 6 is a plan view showing the reflecting member in the same heating element unit. FIG. 7 is a front view of the reflecting member, FIG. 8 is a radiation intensity curve diagram in one embodiment of the heating element unit, and FIG. 9 is the other heating element unit. It is a radiation intensity curve figure in the Example of. First, the heating element unit according to the first embodiment will be described with reference to FIGS. 1 to 4.

  In FIG. 1, the heating element unit according to the first embodiment has a configuration in which a heating element component 2 having a heating element 2a as a heat source is accommodated by a double heat-transmitting tube. In the heating element unit according to the first embodiment, the first heat-transmitting tube is a long first glass tube 1 having a cylindrical shape formed of a quartz glass tube, and the internal space of the first glass tube 1 (hereinafter referred to as the first glass tube 1). , The first internal space) is provided with heating element constituting portions 2 each having a power supply member for supplying electric power from the outside at both ends. A part of the power supply member is disposed in a state of being exposed outward from both end portions of the first glass tube 1, and both end portions of the first glass tube 1 are melted and crushed into a flat plate shape. Thus, the first internal space is sealed. In the first inner space, argon gas, nitrogen gas, a mixed gas of argon gas and nitrogen gas, or the like is used to prevent oxidation of the heating element 2a made of a carbon-based material, which is a main component of the heating element component 2. The inert gas is enclosed. If the first glass tube 1 is not affected by the heat of the heating element 2a in terms of quality, the heating element component 2 is not disposed on the longitudinal center axis of the first glass tube 1, but the longitudinal center. Needless to say, the shaft may be eccentric in a state substantially parallel to the axis.

  The heating element component 2 includes a long heating element 2a having a substantially flat plate shape as a heat radiator, a holder 3 for sandwiching both ends of the heating element 2a, and the heating element 2a directly or indirectly electrically. The power supply member is connected to supply power from the outside to the heating element 2a. The power supply member of the present embodiment includes a coil portion 5 attached to the outer end portion of the holder 3, and a spring portion 6 that connects the other end portion on the inner side to the other end portion on the outer side of the coil portion 5. The internal lead wire 4 connecting the other end on the inner side to the other end on the outer side of the spring part 6 and the outside where the other end on the outer side leads out from both ends of the first glass tube 1 respectively. The lead wire 8 is composed of a molybdenum foil 7 that electrically connects the other end portion on the outer side of the inner lead wire portion 4 and the other end portion on the inner side of the outer lead wire 8. In addition, the coil part 5, the spring part 6, and the internal lead wire 4 are integrally formed with the molybdenum wire. Further, the molybdenum foil 7 is embedded in a state of being sandwiched between sealing portions formed by crushing both end portions of the first glass tube 1 in a flat plate shape.

The heating element 2a in the heating element unit of the first embodiment is a carbon-based material formed in an elongated flat plate shape, and a resistance adjusting substance of a nitrogen compound and amorphous carbon are added to a crystallized carbon substrate such as graphite. Made up of a mixture. The shape of the heating element 2a is, for example, a plate width W of 6.0 mm, a plate thickness T of 0.5 mm, and a length L of 300 mm. In the heating element 2a, it is desirable that the ratio (W / T) between the plate width W and the plate thickness T is 5 or more, that is, the plate width W is 5 times or more of the plate thickness T. By forming the plate width W into a flat plate shape that is at least 5 times larger than the plate thickness T, the amount of heat generated from a wide plane (which is a surface constituting the plate width W, hereinafter referred to as the plate width surface) is formed along a narrow longitudinal direction. The amount of heat emitted from the formed side surface (which is a surface constituting the plate thickness T, hereinafter referred to as the plate thickness side surface) is larger, and the heat radiation of the flat heating element 2a is radiated in a direction perpendicular to the plate width surface. It becomes possible to have directivity that becomes.

  In the heating element unit of the first embodiment, the coil part 5, the spring part 6 and the internal lead wire 4 are described as being formed of molybdenum wire. However, in addition to the molybdenum wire, an elastic metal wire such as tungsten is used. May be configured. Further, when the coil unit 5 is closely wound on the outer peripheral surface of the holder 3 and is spirally wound so as to supply electric power from the coil unit 5 to the heating element 2a via the holder 3 as in this example. The holder 3 and the coil part 5 need to be electrically and reliably connected. In this example, the other end on the outer side of the coil part 5 (the end located on the side away from the heating element 2a) and the one end on the inner side of the spring part 6 (on the side closer to the heating element 2a). The end portion of the inner lead wire 4 is connected to the other outer end portion of the spring portion 6, and the coil portion 5 is wound around the holder 3. In addition, the inner end of the internal lead wire 4 that is not connected to the coil portion 5 is electrically connected to the heating element 2a directly or indirectly through another component other than the coil portion 5, and the internal lead wire 4 Needless to say, the spring portion 6 may be provided.

  Further, the spring portion 6 formed in a spiral shape with an elastic force applies tension to the heating element 2 a, and the heating element 2 a is always in a desired position inside the first glass tube 1. The position is regulated so as to be arranged. Thus, by providing the spring part 6 between the coil part 5 and the internal lead wire 4, it becomes possible to absorb the dimensional change by the thermal expansion of the heat generating body 2a. Further, in the heating element unit of the first embodiment, the example in which the spring portions 6 are provided on both ends of the heating element 2a has been described. However, depending on the specifications of the heating element unit or the state in which the heating element 2a is arranged, the spring Needless to say, a configuration in which the portion 6 is provided only on one end portion side of the heating element 2a, that is, on one end portion is also possible. Further, the other end portion on the outer side of the internal lead wire 4 is joined to one end portion on the inner side of the molybdenum foil 7 by welding, and the other end portion on the outer side of the molybdenum foil 7 is externally connected to the heating element component 2. One end portion on the inner side of the external lead wire 8 that supplies electric power from is joined by welding.

  The first glass tube 1 in which the heating element component 2 configured as described above is arranged in the first internal space has an inner diameter dimension larger than the outer diameter dimension of the first glass tube 1 and has a cylindrical shape. When it is arranged in the internal space of the long second heat-permeable tube (hereinafter referred to as the second internal space), it is located on the second internal space side of the second glass tube 9. In order to be arranged with a predetermined gap space with respect to the inner side wall, the position is regulated using the holding members 10 mounted on the outer side walls respectively positioned on both ends of the first glass tube 1. Yes. In the heating element unit of the first embodiment, the longitudinal axes of the heating element component 2 (or the heating element 2a), the first glass tube 1, and the second glass tube 9 are coaxial or eccentric. However, they are arranged in a substantially parallel state.

  The holding member 10 has a pair of opposed end faces that intersect the central axes of the first glass tube 1 and the second glass tube 9 (in FIG. 1 showing an example, a direction orthogonal to the central axis ( Hereinafter, an end face standing in the radial direction is formed, and an engagement hole 11 penetrating between both end faces is formed in the end part of the first glass tube 1. The end of the first glass tube 1 is held by the holding member 10 by being engaged in a state where it penetrates the end face, that is, the inner side of the holding member 10 located on the heating element 2a side. A locking recess 12 having an outer dimension larger than that of the engagement hole 11 is formed at the opening peripheral edge of the engagement hole 11 located on the end surface. The locking recess 12 engages with the second glass tube 9. That is, the locking recess 12 is The side wall surface is in contact with the outer wall surface of the second glass tube 9 to restrict the movement of the second glass tube 9 in the radial direction, and the bottom surface located on the back side is the end of the second glass tube 9. The movement of the second glass tube 9 in the longitudinal direction is restricted by contacting the portion, and the second glass tube 9 is held.

  Further, a first holding recess 13 having an outer dimension larger than that of the locking recess 12 is formed at the opening peripheral edge of the locking recess 12, and the first holding recess 13 and the second holding recess 13 are formed. The second glass tube 9 is fixed to the first holding recess 13 by applying the adhesive 14 to the first gap space generated between the outer wall surface of the glass tube 9. In addition, the holding member 10 is also connected to the other outer end surface (the end surface on the side where the external lead wire 8 and the like are not positioned) on the other outer end surface facing the inner end surface. A second holding recess 15 (see FIG. 2) having a large outer dimension is formed, and an adhesive is formed in the second gap space formed between the second holding recess 15 and the first glass tube 1. By applying 14, the first glass tube 1 is fixed to the second holding recess 15. Therefore, the adhesive 14 is applied to the first gap space and the second gap space to seal the second internal space (including the predetermined gap space) of the second glass tube, and 2 (preventing entry of contaminants and the like into the internal space 2. As a result, the first glass tube 1 is retained by the holding of the first glass tube 1 and the second glass tube 9 by the holding member 10. And the second glass tube 9 can be accurately maintained, and a highly reliable heating element unit can be configured.

  In the heating element unit according to the first embodiment, the first glass tube 1 and the second glass tube 9 are respectively held by the holding member 10, but the first glass tube 1 and the second glass tube are respectively held. Needless to say, the structure may be employed in place of the holding member 10 shown in FIG. 1 as long as it is a structure (single or plural) made of holding means having a positioning function capable of maintaining the relative positional relationship 9. .

  Further, in the heating element unit according to the first embodiment, the configuration of the heating device on which the heating element unit is mounted enters the second internal space in the second glass tube 9 and the entry of contaminants and the like scattered from the object to be heated. The first gap space formed between the single holding member 10 (or the first holding recess 13) and the second glass tube 9, and the single holding member. 10 (or the second holding recess 15) and the second gap space formed between the first glass tube 1 and the second adhesive of the second glass tube 9 by applying an adhesive 14 to each of the second gap spaces. Although the internal space is sealed from the space outside the heating element unit, the second internal space is sealed to prevent entry of contaminants, for example, the function of the holding member 10 is divided. And a member for positioning the first glass tube 1 and the second glass tube 9 Needless to say, the second glass tube 9 may be a structure that separately constitutes a member that prevents entry of contaminants and the like into the second glass tube 9.

  Incidentally, the entry of contaminants or the like scattered from the heated object into the second gap space of the second glass tube by the heating device having the heating element unit or the configuration of the heating element unit itself (for example, with a filter). If the adhesive 14 is not applied to the first gap space or the second gap space, or the application is applied, the second internal space is completely sealed. Needless to say, you can choose not to.

  Since the first glass tube 1 has a configuration in which a sealed portion is formed by welding, a glass tube such as a quartz glass tube is used, and contaminants (alkaline metal or the like) are attached to such a glass tube. When the temperature is reached, there is a problem that a phenomenon called devitrification occurs and the glass tube is broken. However, in the heating element unit of the first embodiment, the second glass tube 9 is provided so as to cover the outer wall of the first glass tube 1 with the first glass tube 1 and a predetermined gap space. Therefore, the temperature of the second glass tube 9 is lower than that of the first glass tube 1, and the phenomenon of devitrification hardly occurs. Further, by using crystallized glass as the material of the second glass tube 9, the phenomenon of devitrification is less likely to occur.

  As the second glass tube 9, a glass tube having heat resistance according to its use state, for example, a quartz glass tube, a high silica glass tube, a low alkali borosilicate glass tube, a crystallized glass tube, a ceramic tube, etc. Can be selected and used. The consideration conditions in the use state include the use temperature, the heat permeability, the degree of generation of alkaline metal as a contaminant, the strength, etc. The material of the second glass tube 9 is selected in consideration of these conditions. The

  In the heating element unit according to the first embodiment, the predetermined gap space (a part of the second internal space) formed between the first glass tube 1 and the second glass tube 9 is not provided. A reflecting plate 16a made of ferritic stainless steel having a heat resistance and having a thickness of 50 μm is disposed. The plate surface of the reflecting plate 16a faces the plate width surface of the heating element 2a, and the longitudinal direction of the reflecting plate 16a faces the longitudinal direction of the heating member 2a and is parallel (parallel in FIG. 1). Is arranged. Furthermore, the cross-sectional shape when cut in the direction orthogonal to the plate surface of the reflecting plate 16a is such that the first glass can be inserted into the predetermined gap space formed in the second glass tube 9. The curved shape is curved along the outer wall surface of the tube 1 or the inner wall surface of the second glass tube 9 (that is, protruding toward the inner wall surface of the second glass tube 9). As a result, the reflecting plate 16a has high directivity of heat radiation, can prevent the reflecting plate 16a from being contaminated, and can maintain high radiation efficiency.

  Furthermore, the reflecting member 16 is configured by providing the reflecting plate 16a with at least a portion of the elastic portion 17 (see FIG. 4). When a thin plate having a thickness of 50 μm is used as the reflecting plate 16a as in the heating unit of the first embodiment, the reflecting plate 16a heated by the radiant heat of the heating element 2a (for example, about 700 ° C.) is thermally expanded. In addition, the reflector 16a may be distorted, causing wrinkles, twists, and breakage. By providing the elastic portion 17 on at least a part of the reflecting plate 16a, it is possible to absorb the thermal expansion of the reflecting plate 16a and prevent the reflecting plate 16a from being distorted. Therefore, the reflecting plate 16a has a predetermined life while maintaining a predetermined quality. Can keep long.

  Here, ferritic stainless steel is used as the material of the reflecting plate 16a. However, the reflecting plate 16a is made of a material that is difficult to discolor at high temperatures and has a high reflectance, such as nickel (Ni), nichrome, gold, platinum, and a chromium alloy. However, the same effect can be obtained. Needless to say, if the heating unit is not structurally heated, the same effect can be obtained by using aluminum (AL), aluminum alloy, general stainless steel (for example, austenite), copper alloy, or the like. .

  A notch-like reflecting plate engaging portion 18 (see FIG. 2) is formed on the side wall of the engaging hole 11 of the holding member 10, and the reflecting plate engaging portion 18 facing the outer wall surface of the first glass tube 1. The side wall surface is formed of a curved surface that is curved so as to oppose the curved plate surface of the reflecting plate 16a so as to be position-controllable. Further, the reflection plate engaging portion 18 is engaged with an end portion located in the longitudinal direction of the reflection plate 16a disposed in the gap space, and the end portion of the reflection plate 16a is extended in the longitudinal direction of the reflection plate 16a. The reflective plate 16a is formed in a longitudinal direction of the reflective plate 16a so that the reflective plate 16a does not rotate in the circumferential direction with the longitudinal axis of the heating element 2a and the first glass tube 1 as a rotational center. A rotation preventing portion 19 is formed that abuts against a pair of opposing plate thickness side surfaces along which the plate thickness portion is formed to regulate the position.

  Further, a protrusion 20 (see FIG. 3) protruding outward (in the direction of the second glass tube 9 when viewed from the heating element 2a) provided at an end portion located in the longitudinal direction of the reflecting plate 16a is provided on the reflecting plate. A position restriction formed on the outer side of the joining portion 18 and on the bottom surface of the second holding recess 15 (in FIG. 1, the surface positioned so as to be orthogonal to the central axis of the first glass tube 1). The position is restricted so that the reflection plate 16a cannot be moved in the longitudinal direction by being locked by the recess 21 (see FIG. 2). In order to prevent the protrusion 20 from falling off the position restricting recess 21 and releasing the position restriction, the protrusion 20 and the position restricting recess 21 are formed by the adhesive 14 when the adhesive 14 is applied to the second gap space. Glued and fixed. As a result, the reflecting plate 16a or the reflecting member 16 is rotated by the holding member 10 in the circumferential direction around the longitudinal direction of the first glass tube 1 and the heating element 2a and the longitudinal direction of the reflecting plate 16a. Movement to is restricted.

  Therefore, in the heat generating unit of the first embodiment, the protrusion 20 and the position restricting recess 21 of the reflecting plate 16a serve as a position restricting portion for disposing the reflecting plate 16a at a predetermined position with respect to the heat generating member 2a. The position restriction in the longitudinal direction is performed, the rotation prevention unit 19 regulates the rotation of the reflection plate 16a, and the reflection plate engagement unit 18 and the first glass tube 1 regulate the separation distance of the heating element 2a. It becomes. The position restricting portion for disposing the reflecting plate 16a at a predetermined position with respect to the heating element 2a is not limited to the configuration described above, and the first glass tube 1, the second glass tube 9, and the holding member. Needless to say, it may be formed using at least one of the members 10. For example, the first glass tube 1 or the second glass tube 9 is heated to form a convex portion, and the position movement of the reflective plate 16a is regulated by engaging or abutting the reflective plate 16a with the convex portion. You can also.

  FIG. 4 shows an example of the reflecting member 16 in the first embodiment, which is developed in a plane on the drawing. The reflecting plate 16a which is the main part of the reflecting member 16 is made of ferritic stainless steel, and its dimensions are, for example, length (longitudinal direction) 400 mm, plate width (direction perpendicular to the longitudinal direction) 15 mm, The cross-sectional shape when the thickness is 50 μm and the actual reflector 16a is cut in the thickness direction is within the second glass tube 9 on the outer wall surface of the first glass tube 1 or the inner wall surface of the second glass tube 9. The shape can be inserted into the predetermined gap space formed, for example, a curved shape curved along the outer wall surface of the first glass tube 1 or the inner wall surface of the second glass tube 9. Protrusions 20 for fixing to the inner surface of the holding member 10 described above are formed at both ends in the longitudinal direction of the reflecting plate 16a, and incisions to be elastic portions 17 are formed in the vicinity of the protrusions 20. Has been.

  This incision part is constituted by a combination of a first incision line and a second incision line. The first score line intersects the plate width side starting from each of a pair of plate width side sides (a pair of opposing sides formed along the longitudinal direction of the plate width surface) of the reflecting plate 16a (see FIG. In the example shown in Fig. 4, the first cut line formed on one side of the plate width side and the other side of the plate width side are formed by cutting to the vicinity of the other side of the plate width side facing in the direction that is orthogonal) The first cut lines formed on the sides are alternately arranged in a staggered manner, and a plurality of them are arranged while facing each other (parallel in FIG. 4) with a predetermined interval along the longitudinal direction. Is forming.

  Further, the second cut line is cut so as to face the first cut line (parallel in FIG. 4) at the center of the width of the reflecting plate 16a excluding at least the vicinity of the pair of plate width sides of the reflecting plate 16a. Between the first cut line formed on one plate width side of the reflecting plate 16a and the first cut line formed on the other plate width side (that is, at the predetermined interval). (Intermediate) and the first cut lines located at both ends of the group of the first cut lines in the longitudinal direction, respectively.

  When the material of the reflecting plate 16a is ferritic stainless steel and the dimensions are 400 mm in length, 15 mm in plate width, and 50 μm in thickness as described above, it thermally expands by about 5 mm in the longitudinal direction at 800 ° C. For this reason, as a mounting method, a state in which the cut portion that becomes the elastic portion 17 is deformed in advance so as to apply tension in the longitudinal direction of the reflecting plate 16a (that is, by the entire elastic deformation of the elastic portion 17 provided in two places). It is fixed to the holding member 10 in a state of being extended by about 5 mm in the longitudinal direction. By doing so, even if the reflector 16a thermally expands due to thermal radiation from the heating element 2a, the thermal expansion reduces the tension to the cut portion that becomes the elastic portion 17 that applied tension to the reflector 16a. Therefore, the heat generating unit with a long life can be realized without causing the reflector 16a to be wrinkled or damaged. In addition, although the elastic part 17 mentioned above demonstrated in the example formed in the reflector 16a both ends vicinity in FIG. 4, it does not necessarily need to be near both ends, and also about the number, the shape of the reflector 16a, It can be appropriately set depending on the material and the like, and is not limited.

  In the heat generating unit of the first embodiment, the example in which the elastic portion 17 of the reflecting member 16 shown in FIG. 4 is formed by a cut portion has been described. However, the elastic portion 17 has various shapes and configurations. An example is shown in FIGS.

  In FIG. 5, FIG. 5 is developed in a plan view on the drawing similarly to FIG. 4. The elastic portions 22 of the reflecting member 16 used in place of the elastic portions 17 are formed with notches on a pair of opposite sides of the reflecting plate 16a at positions on both ends of the reflecting plate 16a. Thus, a narrow strip is formed on the longitudinal center line of the reflecting plate 16a, and a pair of longitudinal directions disposed along the longitudinal direction at the middle portion in the longitudinal direction of the strip are opposed to each other. A quadrilateral frame having a hole in the center is formed by a frame side and a pair of frame width direction frame sides arranged opposite to each other so as to be orthogonal to the longitudinal direction. Further, the pair of plate width direction frame sides of the frame body are formed in a U-shape so as to protrude in the direction of the hole, respectively, so that the frame body can be elastically deformed and serve as the elastic portion 22. It is comprised as follows.

  6 and 7, FIG. 6 is developed in a plan view in the same manner as FIG. 4, and FIG. 7 is a front view with respect to FIG. The elastic part 23 of the reflecting member 16 shown in FIGS. 6 and 7 corresponds to the elastic part 17 and is arranged at both ends of the reflecting plate 16a. The elastic portion 23 is formed in a narrow plate body with the reflector plate 16a having a small width, and the central side of the narrow plate body is bent into a wave shape, a sawtooth shape, a bellows shape, or the like, and can be expanded and contracted in accordance with the applied tension. A bent portion 23a is formed. Further, a protrusion 20 is formed as a part of the elastic portion 23 at the free end located outside the bent portion 23a. The plate width dimension of the elastic portion 23 or the bent portion 23a shown in FIG. 6 is set smaller than the plate width size of the reflection plate 16a in consideration of appropriate stretchability and strength as a part of the reflection member 16. However, it goes without saying that the size and shape may be arbitrarily set depending on conditions such as the material of the reflecting plate 16a and the configuration of the heating element unit.

  The elastic part 17, the elastic part 22, and the elastic part 23 described above are not restricted by the shape, material, number, position, etc. described above, but the length of the reflecting member 16 without impairing the function of the reflecting plate 16a. Of course, as long as an elastic function is obtained in the direction, for example, the reflecting member 16 may be provided only at one end without being provided at both ends.

  Next, the state of radiation intensity of the heating element unit according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 8 is a cross-sectional view orthogonal to the longitudinal direction of the heating element 2a and the reflecting plate 16a in a state where the heating element 2a plate width surface and the reflecting plate 16a face each other in parallel. FIG. 9 shows the radiation intensity curve shown in FIG. 9 with respect to the longitudinal direction of the heating element 2a and the reflecting plate 16a in the state where the heating element 2a plate width surface and the reflecting plate 16a are arranged so as to be orthogonal to each other. It is a radiation intensity curve figure shown on the orthogonal plane which intersects perpendicularly.

  In FIG. 8, the heat generating element 2a and the reflecting plate 16a are arranged in such a relationship that the plate surface of the reflecting plate 16a faces the plate width surface of the heating element 2a, that is, the plate width W direction (X0-X0) in parallel. A radiation intensity curve is shown on a cross-sectional plane orthogonal to the longitudinal direction of. In FIG. 8, the plate thickness T of the heating element 2a is 1 and the plate width W is 5. In addition, directivity can be given to the radiation intensity of the plate | board width direction of the heat generating body 2a by making the plate width W with respect to the plate width T of the heat generating body 2a 5 times or more.

  The radiation intensity curve 40 shows a radiation intensity curve in the absence of the reflecting plate 16a, and is bidirectional in the plate thickness T direction (Y0-YO direction) of the heating element 2a, that is, orthogonal to the plate width surface of the heating element 2a in the figure. The radiation intensity curve having directivity in both the right direction starting from the heating element 2a and the left direction starting from the heating element 2a is shown. On the other hand, the radiation intensity curve 41 shows a radiation intensity curve when the reflecting plate 16a is disposed, and is one direction of the thickness T direction (Y0-YO direction) of the heating element 2a and starts from the heating element 2a. The radiation intensity curve which has directivity in the said right direction where the reflecting plate 16a is not arrange | positioned is shown. Comparing the radiation intensity curve 40 and the radiation intensity curve 41, the radiation in the right direction from the heating element 2a where the reflecting plate 16a is not disposed has a directivity of 20 to 30% as compared with the case without the reflecting plate 16a. It can be seen that it can be improved.

  In FIG. 9, the positional relationship between the reflecting plate 16a and the heating element 2a is different from the embodiment shown in FIG. 8, and the plate surface of the reflecting plate 16a is perpendicular to the plate width W direction (X0-X0) of the heating element 2a. As shown in (Y0-Y0), the plate thickness surface of the heating element 2a and the plate surface of the reflecting plate 16a (located in the upper direction of the heating element 2a in the figure) are arranged to face each other. A radiation intensity curve is shown on a section plane orthogonal to the longitudinal direction of the heating element 2a and the reflecting plate 16a. The ratio of the plate thickness T and the plate width W of the heating element 2a is the same as that of the embodiment shown in FIG.

  In FIG. 9, the radiation intensity curve 40 showing the case where there is no reflecting plate 16a is the same curve as shown in FIG. On the other hand, when the reflecting plate 16a is provided, unlike in FIG. 8, the radiation in the plate thickness T direction (Y0-YO direction) of the heating element 2a is reflected by the reflecting plate 16a in the plate width W direction. A radiation intensity curve 42 is radiated in a wide range downward in one direction of (X0-X0) and in the drawing in which the reflecting plate 16a is not disposed starting from the heating element 2a.

  Therefore, when local radiation intensity is required, the reflector 16a is arranged in such a relationship that the plate surface of the reflector 16a faces the plate width surface of the heating element 2a in parallel as shown in FIG. When a wide radiant intensity is required, the plate thickness surface of the heating element 2a and the reflecting plate 16a are arranged so that the plate surface of the reflecting plate 16a is orthogonal to the plate width surface of the heating element 2a as shown in FIG. Since the reflecting plate 16a can be arranged in a relationship facing the plate surface, it can be selected according to the application.

(Embodiment 2)
A heating element unit according to Embodiment 2 of the present invention will be described with reference to FIGS. FIG. 10 is a front view showing the structure of the heating element unit according to the second embodiment, FIG. 11 is a sectional side view when the adhesive in the YY section of the heating element unit is omitted, and FIG. FIG. 13 is a plan view showing the reflecting member, FIG. 14 is a front view showing the reflecting member, and FIG. 15 is a reflection in the heating element unit. FIG. 16 is a front view showing the reflection member, FIG. 17 is a plan view showing another example of the reflection member in the heating element unit, and FIG. 18 is the reflection member. FIG.

  First, the heating element unit according to the second embodiment will be described with reference to FIGS. In the description and drawings of the second embodiment, the configuration different from the heating element unit of the first embodiment is that the elastic body formed by processing a part of the reflector is a separate component from the reflector. The reflector is hold | maintained because it is comprised and the separate component is hold | maintained at a holding member. In the description and drawings of the second embodiment, components having the same functions and configurations as those of the heat generating unit of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  In FIG. 10, the reflecting plate 24a in the heating element unit of Embodiment 2 is made of, for example, ferritic stainless steel having a plate thickness of 50 μm and excellent heat resistance. As other materials that can be used, the same effect can be obtained even if it is made of a material that is difficult to discolor at high temperatures and has a high reflectance, such as nickel (Ni), nichrome, gold, platinum, and a chromium alloy. Can do. Needless to say, if the heating unit is not structurally heated, the same effect can be obtained by using aluminum (AL), aluminum alloy, general stainless steel (for example, austenite), copper alloy, or the like. .

  The reflector 24a in the heating element unit of the second embodiment is formed between the first glass tube 1 and the second glass tube 9 in the same manner as the reflector 16a in the heating element unit of the first embodiment. It is arranged in a predetermined gap space (a part of the second internal space). The plate surface of the reflecting plate 24a is opposed to the plate width surface of the heating element 2a, and the longitudinal direction of the reflecting plate 24a is opposed along the central axis direction of the heating element 2a (parallel in FIG. 10). Are arranged as follows. Furthermore, the cut cross-sectional shape (that is, the cross-sectional shape seen from the longitudinal direction) when cut in the thickness direction of the reflecting plate 24a can be inserted into the predetermined gap space formed in the second glass tube 9. The curved shape is curved along the outer wall surface of the first glass tube 1 or the inner wall surface of the second glass tube 9 (that is, protrudes toward the inner wall surface of the second glass tube 9). The length and width of the reflecting plate 24a in the longitudinal direction are such that at least the heat radiated from the heating element 2a is in front of the reflecting plate 24a (the first glass tube 1, the second glass tube 9, or the heating element configuration). It is set to be reflected in the direction of part 2). As a result, the reflecting plate 24a has high directivity of heat radiation, prevents contamination of the reflecting plate 24a, and maintains high radiation efficiency.

  The reflecting member 24 shown in FIGS. 13 and 14 is provided so that the elastic portions 25 are located at both ends of the reflecting plate 24a, respectively, and is made of a nichrome wire or the like so as to have an inner diameter side space therein. It is composed of an elastically deformable coil portion 26 formed by winding a wire. In FIG. 13 and FIG. 14, the reflecting plate 24 a has a plate width of 15 mm, a plate thickness of 50 μm, and a length of 350 mm, and the coil portion 26 that is one of the main parts of the elastic portion 25 has a length of 25 mm. Yes, a wire with a wire diameter of φ0.4 is wound for 5 turns. The attachment structure of the elastic portion 25 and the reflector 24a will be described with reference to FIG. 12A. One end of the coil portion 26 is attached to both ends of the reflector 24a. That is, the curved plate surface located at one end of the reflecting plate is in contact with the curved (curved) shaped wire formed in the coil shape located at one end of the coil portion 26, and is in contact with each other. By welding at the welded portions 27 (three places in FIG. 12A), one end of the reflector 24a and one end of the coil portion 26 are held so as to be fixed. 24 is configured. In addition, in the heating element unit of Embodiment 2 shown in FIG. 12A, the number of the welded portions 27 is three, but the number is not limited as long as the strength capable of fixing the reflecting plate 24a can be obtained. Not to mention.

  Further, the other end of the coil portion 26 is bent so as to be opposed along the thrust axis direction of the coil portion 26 from a position at the same position as the outer diameter of the coil, and is outwardly separated from the end surface of the reflecting plate 24a. A coil extended end portion 28 extending toward is formed. Further, a distal end portion of the coil extending end portion 28 is formed with a bent portion 29 that is bent in a direction orthogonal to the longitudinal central axis of the coil portion 26 and in a direction away from the longitudinal central axis.

  Further, the holding member 30 in the heating element unit of the second embodiment shown in FIGS. 10 and 11 where the elastic body 25 is held, and the holding member 10 in the heating element unit of the first embodiment shown in FIGS. In other words, the reflecting plate engaging portion 18 formed on the side wall of the engaging hole 11 provided in the holding member 10 and the rotation blocking portion 19 formed on the reflecting plate engaging portion 18 are unnecessary. Thus, instead of the reflector engaging portion 18, a notch-like coil extension end engaging portion 31 is formed on the side wall of the engaging hole 11. The coil extension end engaging portion 31 communicates with a position restricting recess 21 (see FIG. 11) formed on the bottom surface of the second holding recess 15.

  The coil portion 26 of the elastic portion 25 attached to the reflection plate 24 a described above is held in the engagement hole 11 of the holding member 30. The end side of the first glass tube 1 is engaged with the inner diameter side space of the coil portion 26. A coil extension end engagement portion 31 is formed on the side wall surface of the engagement hole 11 of the holding member 30, and the coil extension end portion 28 of the elastic portion 25 is inserted into the coil extension end engagement portion 31 to be engaged. Has been. The bent portion 29 penetrating the coil extension end engaging portion 31 and the engagement hole 11 is located on the outer side of the coil extension end engaging portion 31 and the bottom surface of the second holding recess 15 (in FIG. The first glass tube 1, the second glass tube 9, or a surface that is positioned perpendicular to the central axis in the longitudinal direction of the heating element component 2) is engaged and locked. .

  Further, the bent portion 29 locked to the position restricting recess 21 is used for the second holding in the case where there is a possibility that contaminants or the like scattered from the object to be heated enter the second glass tube 9. When the adhesive 14 is applied to the second gap space generated between the recess 15 and the first glass tube 1, the adhesive 14 adheres to the position restricting recess 21 and is fixed and held. The position of the reflector 24a is restricted so that it cannot be moved in the thrust axis direction. Further, the end portion of the first glass tube 1 is engaged with the inner diameter side space of the coil portion 26, and the coil extension end portion 28 is engaged with the coil extension end engagement 31 of the holding member 28, or the position restriction is performed. Since the bent portion 29 is engaged and locked with the concave portion 21, the reflecting plate 24a and the elastic portion 25 are caused to hold the central axis in the longitudinal direction of the first glass tube 1 and the heating element 2a by the holding member 30. The rotation in the circumferential direction around the rotation center is restricted.

  Therefore, in the heat generating unit of the second embodiment, the bent portion 29 and the position restricting concave portion 21 are related to the position restricting portion for arranging the reflector 24a at a predetermined position with respect to the heat generating member 2a. Accordingly, the position of the reflecting plate 24a is regulated in the longitudinal direction, and the bent portion 29 and the position regulating recess 21 or the coil extending end portion 28 and the coil extending end engaging portion 31 are rotated by the engagement of the reflecting plate 24a. The coil extending end portion 28 and the coil extending end engaging portion 31 or the inner diameter side of the coil portion 26 and the first glass tube 1 are engaged with each other so that the separation distance between the reflecting plate 24a and the heating element 2a is increased. It will be regulated. The position restricting portion for arranging the reflecting plate 24a at a predetermined position with respect to the heating element 2a is not limited to the configuration described above, and the first glass tube 1, the second glass tube 9, and the holding member. Needless to say, it may be formed using at least one of the members 30. For example, the first glass tube 1 or the second glass tube is heated to form a convex portion, and the positional movement of the reflecting plate 24a can be regulated by engaging or abutting the convex portion.

  In addition, the coil portion 26 of the elastic portion 25 held by the holding member 30 in order to arrange the reflecting plate 24a in a predetermined gap space formed between the first glass tube 1 and the second glass tube 9. In a normal temperature state, the reflector 24a is stretched so as to give a tension so as to absorb the change in length of the reflector 24a that has been heated and expanded by the radiant heat of the heating element 2a supplied with power from the outside. It has become. Therefore, as described above, when the reflector 24a has a plate width of 15 mm, a plate thickness of 50 μm, and a length of 350 mm, and the material is ferritic stainless steel, the reflector 24 a is heated to 800 ° C. For example, since the reflecting plate 24a thermally expands in the longitudinal direction by about 4.5 mm, the coil portion 26 is stretched 4.5 mm by applying a tension in the longitudinal direction of the coil portion 26 in advance (the same direction as the longitudinal direction of the reflecting plate 24a). It fixes to the holding member 30 in a state. As a result, even if the reflecting plate 16a is thermally expanded by heat radiation from the heating element 2a and the length of the reflecting plate 24a is changed, the change in the length of the reflecting plate 24a due to the thermal expansion applies tension to the reflecting plate 24a. Since the extension deformation of the coil portion 26 that becomes the elastic portion 25 is absorbed in a direction to be reduced, a long-life heating element unit can be realized without causing the reflector 16a to be wrinkled or damaged.

  In the example of the heating element unit according to Embodiment 2 described with reference to FIGS. 10 to 14, the case where the elastic bodies 25 are provided at both ends of the reflector 24a has been described. There is no need to be in the vicinity, and the number can be appropriately set depending on the shape, material, etc. of the reflector 24a, and is not limited.

  Further, the contamination scattered from the object to be heated in the second gap space of the second glass tube by the heating device having the heating element unit of the second embodiment or the configuration of the heating element unit itself (for example, with a filter). If the structure can prevent the entry of a substance or the like, the adhesive 14 is not applied to either the first gap space or the second gap space, or the second inner space is completely removed even if applied. Needless to say, it can be selected not to seal. Further, when the adhesive 14 is not applied to the second gap space, whether or not the position restricting recess 21 and the bent portion 29 are held by the application of the adhesive 14 depends on whether the position restricting recess 21 and the bent portion 29 are held. It may be determined in consideration of the holding configuration, holding strength, holding reliability, and the like.

  In the heating element unit according to the second embodiment, the reflecting member 24 has a curved shape formed in a coil shape located at one end of the reflecting plate 24a and one end of the coil portion 26 as shown in FIG. However, as long as the arrangement relationship between the reflecting plate 24a and the coil portion 26 can be maintained, a known holding structure may be used, or a combination of them and welding may be used. You may hold | maintain by. For example, like the reflecting member 24 shown in FIG. 12B, the curved center side with respect to the plate surface of the reflecting plate 24a at the end of the curved reflecting plate 24a (the inner diameter side of the heating element unit where the heating element 2a is located). The welding portion 27 is welded while positioning one end portion of the coil portion 26 disposed on the back surface side of the reflecting plate 24a by the restriction locking piece 32 bent so as to stand upright.

  As another configuration, the free end of the restriction locking piece 32 is further bent to the back side of the reflecting plate 24a, and the restricting locking piece 32 is formed in an L shape so as to face the back side of the reflecting plate 24a. By doing so, a U-shaped coil wire engaging portion is formed by the regulating locking piece 32, the free end of the bent regulating locking piece 32 and the back surface of the reflection plate 24a, and the coil A coil wire positioned at one end of the coil portion 26 is inserted into and engaged with the wire engaging portion, and the welding portion 27 performs positioning in the temporarily fixed state while positioning the reflector 24a and the coil portion 26. It is also possible to weld a coil wire located at one end of the wire.

  Further, in the heating unit of the second embodiment, as an example in which the mounting structure of the reflecting plate 24a and the elastic portion 25 constituting the reflecting member 24 shown in FIGS. 12 to 14 is different, the hook shown in FIGS. The holding structure will be described. 15 and 16, the difference from the example shown in FIG. 12 to FIG. 14 is that the one end side of the reflector 24a is welded at the welded portion 27 in the same manner as the example shown in FIG. 10 to FIG. However, the other end portion side of the reflecting plate 24 a has a structure in which the other end portion of the reflecting plate 24 a and one end portion of the coil portion 26 are not welded by the welding portion 27. That is, on the other end side of the reflecting plate 24a, instead of welding, on the other end side facing the one end where the coil extended end portion 28 of the coil portion 26 that is a part of the elastic portion 25 is positioned, The hook portion 34 is formed by processing the end portion of the coil wire material forming the hook, and the hook locking hole 35 is formed at one end portion of the reflecting plate 24a. When the portion 34 is inserted and hooked, the hook portion 34 is locked in the hook locking hole 35 and the elastic portion 25 is attached to the reflecting plate 24a.

  As in the example shown in FIGS. 10 to 14, the elastic portion 25 has a distal end portion of the coil extended end portion 28 in a direction perpendicular to the winding center axis of the coil portion 26 and away from the winding center axis. Since the bent portion 29 that is bent in the direction is formed, the coil extension end portion 28 is engaged with the coil extension end engagement 31 of the holding member 28 in the same manner as in the example shown in FIGS. The bent portion 29 is engaged and locked to the position restricting recess 21 of 28, and has the same effect. Further, in the heating element unit of the second embodiment, another example in which the elastic portion 25 constituting a part of the reflecting member 24 shown in FIGS. 12 to 14 is different will be described with reference to FIGS. 17 and 18, the difference from the example shown in FIGS. 12 to 14 is that an elastic portion 36 made of a metal plate having an elastic force is provided instead of the elastic portion 25, and this elastic portion. 36 is formed in the same bent shape as the elastic part 23 shown in FIG.6 and FIG.7.

  The elastic portion 36 of the reflecting member 24 shown in FIGS. 17 to 18 is formed as a plate formed smaller than the plate width of the reflecting plate 24a in the same manner as the elastic portion 23 shown in FIGS. The welded portion at one end of the reflector 24a is arranged so that the longitudinal direction of the plate is arranged along the longitudinal direction of the first glass tube 1, the second glass tube 9, or the heating element component 2 It is welded at 27. Further, a bent portion 38 having a wave shape, a sawtooth shape, a bellows shape or the like similar to the elastic portion 23 shown in FIGS. 6 to 7 is formed on the center side in the longitudinal direction of the plate body. The elastic deformation is performed according to the tension generated by the expansion / contraction of 24a. Further, at the other end portion facing the one end portion welded to the reflecting plate 24a, the coil extension end portion 29 shown in FIGS. 12 to 16 or the protrusion 20 of the elastic portion 23 shown in FIGS. A projection 39 having the same function as that of the plate is formed by being bent in a direction perpendicular to the plate surface of the plate body and in an outward direction (a direction away from the thrust axis direction) and locked to the position regulating recess 21. Become. The plate width size of the elastic portion 36 or the bent portion 38 is smaller than the plate width size of the reflecting plate 24a in consideration of appropriate stretchability and strength as a part of the reflecting member 24, and has the same width size shape. However, it goes without saying that the size and shape may be arbitrarily determined depending on conditions such as the material of the reflector 24a and the configuration of the heating element unit.

  The elastic part 25 and the elastic part 36 described above are not restricted by the shape, material, number, position, etc. described above, but have an elastic function in the longitudinal direction of the reflecting plate 24a without hindering the function of the reflecting plate 24a. It goes without saying that, for example, it may be provided only at one end without being provided at both ends of the reflecting plate 24a.

  Needless to say, the radiation intensity of the heating element unit according to the second embodiment is the same as that described with reference to FIGS. 8 and 9 in the heating element unit according to the first embodiment.

  As described above, the elastic portions 17, 22, 23, 25, and 36 have been described in the heating element units according to the first and second embodiments. However, the elastic portions 17, 22, 23, 25, and 36 are not limited to those configurations. A known configuration may be used as long as the thermal expansion of 24a can be absorbed.

  In the heating element units of the first and second embodiments, the heating element 2a has been described as a flat plate, but this plate may be hard or soft. In addition, it may be a fibrous strip containing carbon fiber or the like, or a shape in which the strip is cut, or a heating element having an average plane even if the plane is uneven. Thus, the same effect as the present invention can be obtained.

  Further, although the heat generating element 2a in each embodiment has been described using a directional plate-like object, the heat generating element 2a has a non-directional shape, a round shape, which is formed by spirally winding the belt-like element. Directivity in one direction can be enhanced by using the reflecting plate 12a or the reflecting plate 24a even if it has a rod shape or a substantially rectangular prism shape.

  The heating element unit according to the present invention has a long life, a small size, high efficiency, and can be easily adapted to various applications by providing an elastic portion on at least a part of the reflecting plate member having the reflecting plate. It is possible to provide a heating element unit as a highly versatile heat source.

The front view which shows the structure of the heat generating body unit of Embodiment 1. FIG. Sectional side view in the ZZ cross section of the same heating element unit Cutaway perspective view showing end of reflector in same heating element unit Plan view showing the reflector The top view which shows the example from which the reflecting plate in the same heat generating unit differs The top view which shows the other different example of the reflecting plate in the same heating element unit Front view of the reflector Radiation intensity curve in one embodiment of the heating element unit Radiation intensity curve diagram in another embodiment of the same heating element unit The front view which shows the structure of the heat generating body unit of Embodiment 2. FIG. Sectional side view in YY section of the heating element unit Cutaway perspective view showing a reflecting member in the heating element unit Plan view showing the reflection member Front view showing the reflection member The top view which shows the example from which the member for reflection in the same heat generating unit differs Front view showing the reflection member The top view which shows the other different example of the member for reflection in the same heat generating body unit Front view showing the reflection member

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st glass tube 2 Heating body structure part 2a Heating body 3 Holder 4 Internal lead wire 5 Coil part 6 Spring part 7 Molybdenum foil 8 External lead wire 9 2nd glass tube 10 Holding member 11 Engagement hole 12 Locking Concave portion 13 first holding concave portion 14 adhesive 15 second holding concave portion 16 reflecting plate member 16a reflecting plate 17 elastic portion 18 reflecting plate engaging portion 19 rotation preventing portion 20 protrusion 21 position regulating concave portion 22 elastic portion DESCRIPTION OF SYMBOLS 23 Elastic part 24 Reflector member 24a Reflector 25 Elastic part 26 Coil part 27 Welding part 28 Coil extended end part 29 Bending part 30 Holding member 31 Coil extended end engaging part 32 Restriction locking piece 34 Hook part 35 Hook locking Hole 36 Elastic part 38 Bent part 39 Projection 40 Radiation intensity curve 41 Radiation intensity curve 42 Radiation intensity curve

Claims (10)

  A heating element having a heating part, a holder attached to an end located in the longitudinal direction of the heating element, and an electric power source connected to the heating element directly or indirectly to supply electric power to the heating element from the outside A power supply member to be supplied, a first heat permeable tube in which a part of the heating element, the holder, and the power supply member are arranged in a first internal space, and the first heat permeable tube in a second internal space A second heat-permeable tube disposed on the holding member, a holding member provided so that the first heat-permeable tube and the second heat-permeable tube have a predetermined gap space, and the first heat-permeable tube. A reflecting member having a reflecting plate disposed in a gap between the heat pipe and the second heat-transmitting tube and an elastic portion provided on the reflecting plate, and the reflecting plate at a predetermined position with respect to the heating element It is directly attached to at least one of the holding member, the first heat transfer tube, and the second heat transfer tube so as to be disposed. The heating element unit is constituted by a position restricting portion provided indirectly, and absorbs thermal stress to the reflecting plate caused by heat of the energized heating element by the elastic portion.   The heating element unit according to claim 1, wherein the elastic portion of the reflecting member absorbs expansion and contraction in the longitudinal direction of the heating element.   The elastic part of the reflection member is an elastic member having elasticity that absorbs expansion and contraction in the longitudinal direction of the heating element, and the elastic member is mechanically coupled to a reflection plate. The heating element unit according to 1 or 2.   The heating element unit according to any one of claims 1 to 3, wherein the reflecting plate is formed of a thin metal plate.   The heating element unit according to claim 4, wherein the reflection plate is formed of a thin metal plate of nickel, stainless steel, or nichrome.   The heating element unit according to claim 3, wherein the elastic member is formed by bending a plate material.   The heating element unit according to claim 3, wherein the elastic member is formed of a wire in a coil shape.   The heating element unit according to any one of claims 6 to 7, wherein the elastic member is formed of a metal such as molybdenum, tungsten, nickel, stainless steel, or nichrome.   The heating element includes a carbon-based material, and forms a flat portion on at least a part of a side wall formed along the longitudinal direction of the heating element, faces the flat portion, and passes through the heating element. The heating element according to any one of claims 1 to 8, wherein a reflecting surface of the reflecting member that reflects heat toward the heating element side is arranged in a back surface side direction of the flat portion. unit.   The heating element includes a carbon-based material, and forms a plane portion on at least a part of a side wall formed along the longitudinal direction of the heating element, intersects with a virtual extension surface of the plane portion, and the plane portion The heating element unit according to any one of claims 1 to 8, wherein a reflection surface of the reflecting member that is reflected toward the heating element side is disposed in a rear surface side direction of the heating element unit.

Images