Heating device

Abstract

To provide a heating apparatus capable of heating a long heating object more efficiently.SOLUTION: A heating apparatus 1 is equipped with a plurality of heaters 2 each having a carbonaceous heating element 10. The heaters 2 are arranged such that the carbonaceous heating elements 10 extend in the vertical direction and are adjacent to each other. The heater 2 has a connection portion 14 electrically connected to a power source. The connection portion 14 is disposed at the lower end of the heater 2. The heater 2 has a pair of carbonaceous heating elements 10. The pair of carbonaceous heating elements 10 is arranged in the direction in which the heaters 2 are arranged, and are incorporated into "U" shaped wiring that opens downward.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a heating device capable of heating a long heating target. [Background technology]

[0002] A known heater is described in JP 2020-95880 A (Patent Document 1). This heater has a coil-shaped pipe 8 that is wound in a spiral shape around the outer periphery of a long heater 9, and heats the fluid passing through the inside of the pipe 8. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-95880 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the above heater, the long pipe 8 is arranged in a spiral shape along the heater 9, so that the long pipe 8 is heated sufficiently. However, in the above heater, there is a limit to the length of the heater 9, and there is room for improvement in heating an object having a length exceeding that length (the length of the spiral corresponding to that length).

[0005] SUMMARY OF THE PRESENT DISCLOSURE ... In view of the above, a main object of the present invention is to provide a heating device capable of more efficiently heating a long heating target. [Means for solving the problem]

[0006] The present specification discloses a heating device. The heating device includes a carbonaceous heating element. , connection part, tube and upper case Multiple heater Each heater is provided with the carbonaceous heating element. And each pipe In the vertical direction Extend They are arranged by condition. The heaters are adjacent to each other. The heaters have a connection part electrically connected to a power source. The connection part is arranged at the lower end of the heater. Each heater has a pair of carbonaceous heating elements. The pair of carbonaceous heating elements in each heater are arranged in the direction in which the heaters are arranged, and are incorporated into a "U"-shaped wiring that opens downward, and the upper ends of the pair of carbonaceous heating elements are electrically connected to each other via a connection part. Each heater has a pair of tubes. The pair of tubes in each heater cover the corresponding one of the pair of carbonaceous heating elements. The upper ends and the connection part of the pair of tubes in each heater are contained in an upper case. Effect of the Invention

[0007] A main advantage of the present invention is that it provides a heating device capable of heating a long heating target more efficiently. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic perspective view of a heating device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view of a heater in the heating device of FIG. [Diagram 3] FIG. 3 is a partially exploded perspective view of the heater of FIG. 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described together with modified examples with reference to the accompanying drawings. It should be noted that the embodiment is not limited to the following examples and modified examples.

[0010] FIG. 1 is a schematic perspective view of a heating device 1 according to this embodiment. The heating device 1 includes a plurality of heaters 2 and a heater connection portion 3 . The heaters 2 are arranged in one direction and extend in the up-down direction. The up-down direction is the vertical direction. Each heater 2 faces in the up-down direction. The longitudinal direction of the heaters 2 is the vertical direction of the heating device 1, the direction intersecting the vertical direction and in which the heaters 2 are arranged is the horizontal direction of the heating device 1, and the direction intersecting the horizontal direction and the vertical direction is the front-rear direction of the heating device 1. Such directions of the heating device 1 are determined for the convenience of explanation and may change depending on the movement of various members and parts, the manner of installation, etc.

[0011] Fig. 2 is a perspective view of the heater 2. Fig. 3 is a partially exploded perspective view of the heater 2. Each heater 2 is a lamp heater, and includes a plurality of (two) tubes 4, an upper case 5, and a current-carrying portion 6. Since the heaters 2 are similar to each other, unless otherwise specified, the following description will be given of one heater 2. Note that some of the heaters 2 may be different from the other heaters 2. In the heating device 1, three or more types of heaters 2 may be used.

[0012] Each tube 4 is made of quartz glass and has light transmissivity. Each tube 4 extends vertically and is cylindrical with both upper and lower ends sealed. The material of at least any of the tubes 4 may be other than quartz glass as long as it transmits infrared rays and is heat resistant. Furthermore, the shape of at least any of the tubes 4 may be other than cylindrical, such as a square tube. The upper end of each tube 4 is a tube upper plate-like portion 7 formed in the shape of a horizontal plate. The lower end of each tube 4 is a tube lower plate-like portion 8 formed in a horizontal plate shape. An inert gas such as argon gas is sealed inside each tube 4 to prevent deterioration due to oxidation of the current-carrying portion 6. Note that the sealing of the inert gas may be omitted. The tubes 4 are arranged side by side on the left and right. The tubes 4 are adjacent to each other.

[0013] The upper case 5 is non-conductive and heat resistant. A recess 9 recessed upward from the front to the rear is formed in the center of the lower part of the upper case 5 in the front-to-rear direction. The size of the recess 9 in the front-to-rear direction is the same as the size (thickness) of the upper tube plate portion 7 in the front-to-rear direction, and the pair of upper tube plate portions 7 are placed inside the recess 9 side by side on the left and right.

[0014] The current-carrying section 6 has a plurality of (two) carbonaceous heating elements 10, an upper wiring section 12 as a first wiring section, a connection section 14, and a lower wiring section 16 as a second wiring section. In FIG. 1, the current-carrying parts 6 other than the connection parts 14 are omitted.

[0015] Each carbonaceous heating element 10 is a plate-like member that extends in the longitudinal direction and expands in all directions. Each carbonaceous heating element 10 is a carbonaceous plate. Each carbonaceous heating element 10 is oriented so as to extend in all directions, with the longitudinal direction being the up-down direction. At least one of the carbonaceous heating elements 10 may be oriented in a direction other than horizontal. At least one of the carbonaceous heating elements 10 may be shaped in a manner other than a plate. Each carbonaceous heating element 10 has slits 18 of the same length cut alternately at equal intervals from the left and right sides over the entire surface except for the ends. Thus, each carbonaceous heating element 10 has a meandering shape. The length of some of the slits 18 may be longer or shorter than the length of the other slits 18. Also, the size between some of the slits 18 may be larger or smaller than the size between the other slits 18. When energized, each carbonaceous heating element 10 generates heat by radiating infrared rays. Depending on the arrangement of the slits 18 in each carbonaceous heating element 10, the resistance of each carbonaceous heating element 10 is adjusted, the amount of infrared radiation is adjusted, and the amount of heat generated is adjusted. For example, if the size between the slits 18 above and below the center of each carbonaceous heating element 10 is made larger than the size between the slits 18 at the center, the resistance at the center of each carbonaceous heating element 10 is larger than the size between the slits 18 at the top and bottom, the amount of infrared radiation at the center of each carbonaceous heating element 10 is larger than the size between the slits 18 at the top and bottom, the amount of heat generated at the center of each carbonaceous heating element 10 is larger than the size between the slits 18 at the top and bottom, and the amount of infrared radiation at the center of each carbonaceous heating element 10 is larger than the size between the slits 18 at the top and bottom. Each carbonaceous heating element 10 is lighter than a metal of the same size, and therefore the heater 2 is lighter than a heater using a metal heating element of approximately the same size. Furthermore, each carbonaceous heating element 10 emits infrared rays and heats the heating target C with the infrared rays, so the heater 2 can efficiently heat even a distant heating target C, and can heat a high-temperature heating target C while suppressing a decrease in the amount of heat transfer. Furthermore, each carbonaceous heating element 10 instantly emits light (red heat) in response to the application of power, making it easy for the user to grasp the operating state of the heater 2.

[0016] Each carbonaceous heating element 10 is held within a corresponding tube 4 . The amount of infrared radiation from the front and rear surfaces of each carbonaceous heating element 10 is greater than the amount of infrared radiation from the thick surfaces of the top, bottom, left and right surfaces of each carbonaceous heating element 10. That is, infrared radiation from each carbonaceous heating element 10 is mainly from the front and rear surfaces, and the thermal radiation from each carbonaceous heating element 10 has directionality. One or more reflectors for reflecting infrared rays may be provided inside at least one of the tubes 4. The reflectors may be entirely in contact with the inner wall of each tube 4, or may be partially or entirely separated from the inner wall. The reflectors may be disposed at the rear of at least one of the tubes 4.

[0017] The upper wiring portion 12 has an upper lead portion 20 and an upper wiring connection portion 22 for each carbonaceous heating element 10 . The upper wiring portion 12 is connected to the upper end portion (first end portion) of each carbonaceous heating element 10.

[0018] The upper lead portion 20 has an upper lead 24 for each carbonaceous heating element 10 and a connection portion 26 . Each upper lead wire 24 extends forward and backward. Each upper lead wire 24 is a conducting wire and does not have a non-conductive coating. Each upper lead wire 24 passes through the tube upper plate-like portion 7 of the corresponding tube 4. The front end of each upper lead wire 24 is disposed within the tube upper plate-like portion 7. The rear end of each upper lead wire 24 is disposed within the front portion of the corresponding tube 4. At least one of the upper lead wires 24 may have a non-conductive coating. The connection portion 26 is disposed across the pair of tube upper plate-like portions 7, and electrically connects the front ends of the upper lead wires 24 to each other. The connection portion 26 and the front ends of the conductive parts of each upper lead wire 24 are welded to each other. Note that the connection portion 26 and the front ends of the conductive parts of each upper lead wire 24 may be connected to each other by crimping or the like instead of or in addition to welding.

[0019] Each upper wiring connection portion 22 is formed by a conductive plate bent at multiple points, and has a front spacer portion 32, a first bent portion 33, a front plate portion 34, a pair of left and right second bent portions 35, a recess 36, a rear plate portion 37, a third bent portion 38, and a rear spacer portion 39. The front spacer portion 32 has a front shape of the cross section of the internal space of the tube 4, that is, a front half circular shape, when viewed from above. The first bent portion 33 is disposed between the front spacer portion 32 and the front plate portion . The front panel portion 34 is oriented so as to extend vertically and horizontally. Each of the second bent portions 35 is disposed between the front plate portion 34 and the rear plate portion 37. The second bent portions 35 are disposed at both ends between the front plate portion 34 and the rear plate portion 37 in the left-right direction. The recess 36 is disposed between the left and right second bent portions 35. The recess 36 is recessed rearward relative to each of the second bent portions 35. The rear plate portion 37 is in a position that spreads up, down, left and right. The rear plate portion 37 and the front plate portion 34 are disposed below the second bent portions 35 and the recessed portions 36, and face each other. The lower end of the corresponding upper lead wire 24 is introduced between the rear plate portion 37 and the front plate portion 34 through the recessed portion 36, and the upper wiring connection portion 22 and the corresponding upper lead wire 24 are electrically connected by this introduction and the contact of the lower end of the upper lead wire 24 with at least one of the rear plate portion 37 and the front plate portion 34. In addition, the upper end of the corresponding carbonaceous heating element 10 is introduced from below between the rear plate portion 37 and the front plate portion 34, and the upper wiring connection portion 22 and the corresponding carbonaceous heating element 10 are electrically connected by this introduction and the contact of the upper end of the carbonaceous heating element 10 with at least one of the rear plate portion 37 and the front plate portion 34. Therefore, the upper lead wire 24 and the corresponding carbonaceous heating element 10 are electrically connected to each other through the upper wiring connection portion 22. Incidentally, the carbonaceous heating element 10 and the corresponding upper lead wire 24 may be directly electrically connected to each other. The third bent portion 38 is disposed between the rear plate portion 37 and the rear spacer portion 39 . The rear spacer portion 39 has a rear shape corresponding to the rear part of the cross section of the internal space of the pipe 4, that is, a rear half circular shape, as viewed from above. Each upper wiring connection portion 22 is positioned within the upper portion of the tube 4, and the thick portions of the front spacer portion 32 and the rear spacer portion 39 contact the inner wall of the tube 4, thereby holding the corresponding carbonaceous heating element 10 in a position that spreads out vertically and horizontally within the tube 4.

[0020] The upper wiring portion 12 is not directly connected to a connection portion 14 which is a terminal portion including a terminal used for connection to the outside. The upper wiring portion 12 is disposed within the upper ends of the pair of tubes 4 .

[0021] The connection portion 14 has an electrode pin 42 for each carbonaceous heating element 10 and a non-conductive electrode pin case 44 . Each electrode pin 42 is made of metal, is conductive, extends in the front-rear direction, and is aligned left and right. The number of electrode pins 42 may be one, or may be three or more. Furthermore, at least any of the electrode pins 42 does not have to be aligned left and right, and may face in a direction other than the front-rear direction, such as an oblique direction or a left-right direction. The electrode pin case 44 is heat resistant. A recess 48 is formed in the center of the lower part of the electrode pin case 44 in the front-rear direction, recessed downward relative to the front and rear. The size of the recess 48 in the front-rear direction is the same as the size (thickness) of the tube under plate-like parts 8 in the front-rear direction, and the pair of tube under plate-like parts 8 are contained within the recess 48. The electrode pin case 44 is not considered to be a component of the current-carrying part 6 or the connection part 14, and may be a component independent of the current-carrying part 6 or the connection part 14. Each electrode pin 42 is disposed behind the recess 48 and is held at the rear of the electrode pin case 44 . Each electrode pin 42 is a terminal of the heater 2 that is connected to an external power source. A rear end of each electrode pin 42 is exposed to the outside. The connection portion 14 may use a lead wire instead of a terminal portion using the electrode pin 42 as a terminal. This lead wire may be integrated with a lower lead wire portion 50 described below. Also, the connection portion 14 may be something other than the electrode pin 42 which is a terminal rod, or something other than the lead wire.

[0022] The lower wiring portion 16 has a lower lead portion 50 and a lower wiring connection portion 52 for each carbonaceous heating element 10 . The lower wiring portion 16 is connected to the lower end (second end) of each carbonaceous heating element 10.

[0023] The lower lead portion 50 has a lower lead 54 for each carbonaceous heating element 10 . Each lower lead wire 54 extends vertically. Each lower lead wire 54 is a conductive wire and does not have a non-conductive coating. Each lower lead wire 54 passes through the tube lower plate portion 8 of the corresponding tube 4. The upper end of each lower lead wire 54 is disposed within the lower portion of the corresponding tube 4. The lower portion of each lower lead wire 54 is disposed below the corresponding tube 4. The lower end of each lower lead wire 54 is electrically connected to the corresponding electrode pin 42. At least one of the lower lead wires 54 may have a non-conductive coating.

[0024] Each lower wiring connection portion 52 is formed by a conductive plate bent at multiple points, and has a front spacer portion 62, a first bent portion 63, a front plate portion 64, a pair of left and right second bent portions 65, a recess 66, a rear plate portion 67, a third bent portion 68, and a rear spacer portion 69. The front spacer portion 62 has the shape of the front part of the cross section of the internal space of the tube 4, that is, a front half circular shape, when viewed from below. The first bent portion 63 is disposed between the front spacer portion 62 and the front plate portion 64 . The front plate portion 64 is oriented so as to extend vertically and horizontally. Each second bent portion 65 is disposed between the front plate portion 64 and the rear plate portion 67. The second bent portions 65 are disposed at both ends between the front plate portion 64 and the rear plate portion 67 in the left-right direction. The recess 66 is disposed between the left and right second bent portions 65. The recess 66 is recessed upward with respect to each of the second bent portions 65. The rear plate portion 67 is in a position that spreads up, down, left and right. The rear plate portion 67 and the front plate portion 64 are disposed above the second bent portions 65 and the recessed portions 66, and face each other. Between the rear plate portion 67 and the front plate portion 64, the upper end portion of the corresponding lower lead wire 54 is introduced through the recessed portion 66, and the lower wiring connection portion 52 and the corresponding lower lead wire 54 are electrically connected by this introduction and the contact of the upper end portion of the lower lead wire 54 with at least one of the rear plate portion 67 and the front plate portion 64. Also, between the rear plate portion 67 and the front plate portion 64, the lower end portion of the corresponding carbonaceous heating element 10 is introduced from above, and the lower wiring connection portion 52 and the corresponding carbonaceous heating element 10 are electrically connected by this introduction and the contact of the lower end portion of the carbonaceous heating element 10 with at least one of the rear plate portion 67 and the front plate portion 64. Therefore, the lower lead wire 54 and the corresponding carbonaceous heating element 10 are electrically connected to each other through the lower wiring connection portion 52. Incidentally, the carbonaceous heating element 10 and the corresponding lower lead wire 54 may be directly electrically connected to each other. The third bent portion 68 is disposed between the rear plate portion 67 and the rear spacer portion 69 . The rear spacer portion 69 has a rear shape corresponding to the rear part of the cross section of the internal space of the pipe 4, that is, a rear half circular shape, when viewed from below. Each lower wiring connection portion 52 is positioned within the lower portion of the tube 4, and the thick portions of the front spacer portion 62 and the rear spacer portion 69 contact the inner wall of the tube 4, thereby holding the corresponding carbonaceous heating element 10 in a position that spreads out vertically and horizontally within the tube 4.

[0025] The lower wiring portion 16 is directly connected to the connection portion 14, which is a terminal portion including terminals used for connection to the outside. More specifically, the lower lead wire portion 50 of the lower wiring portion 16 is directly connected to each electrode pin 42 of the connection portion 14. The lower wiring portion 16 is disposed within the closed lower ends of the pair of tubes 4. The lower wiring portion 16 is directly connected to each of the electrode pins 42 of the connection portion 14, which is partially exposed to the outside.

[0026] A circuit in which two carbonaceous heating elements 10 serving as resistors are connected in series is formed by such a current-carrying section 6. Note that the carbonaceous heating elements 10 may be connected in parallel or in other manners. Each carbonaceous heating element 10 is energized by connecting each electrode pin 42 to a power source such as a single-phase AC power source, and emits infrared rays to generate heat. The current-carrying section 6 is generally in a "U" shape that opens downward. In the current-carrying section 6, a carbonaceous heating element 10 is disposed on each of two opposing sides. That is, a pair of carbonaceous heating elements 10 are incorporated into a "U" shaped wiring that opens downward. Therefore, while ensuring the width of the heating section, each electrode pin 42 can be gathered at the lower end, and the connection part 14 can be located in one place. Also, since each carbonaceous heating element 10 is adjacent to each other and a tube 4 is provided for each carbonaceous heating element 10, each carbonaceous heating element 10 is protected from physical contact and short circuit.

[0027] The heater connection portion 3 has a rectangular parallelepiped shape extending in the left-right direction, and a plurality of electrode pin receiving holes 80 extending downward from the upper surface are provided at the upper portion. The electrode pin receiving holes 80 are lined up on the left-right side. A conductive part (not shown) electrically connected to a power source is provided on the inner surface of each electrode pin receiving hole 80. The number of electrode pin receiving holes 80 may be one, or may be three or more. Furthermore, at least any of the electrode pin receiving holes 80 may not be lined up on the left-right side, and may face in a direction other than the front-rear direction, such as a diagonal direction or a left-right direction. The heater 2 is attached to the heater connection part 3 by inserting the corresponding electrode pins 42 of the heater 2 into any two of the electrode pin receiving holes 80. By such attachment, the heater 2 is electrically connected to the power source via the electrode pins 42 and the conductive part. The electrode pin receiving holes 80 may be divided into two parts according to the pair of electrode pins 42 of the heater 2. The division may be a protrusion protruding upward, a recess such as a groove recessed downward, or a mixture of these. The heater connection part 3 may be directly connected to the electric current part 6 of the heater 1 without using a terminal. In this case, the electrode pin receiving holes 80 may be omitted, and the conductive part may be connected to the electric current part 6 by a lead wire or the like. The heater connection part 3 may be something other than the above. Furthermore, by mounting the heaters 2 adjacent to each other, the front and rear surfaces of the carbonaceous heating elements 10 in each tube 4 are aligned in the left-right direction, forming a heating surface H that is long in the left-right direction from front to back. That is, the plate-shaped carbonaceous heating elements 10 in each heater 2 are arranged with their surfaces facing the same direction (front and rear). The heaters 2 are aligned with the carbonaceous heating elements 10 extending in the vertical direction and adjacent to each other. The heating device 1 may be provided with a switch for turning the power on and off. Also, a reflector may be provided to cover part or all of the rear heating surface H, so that the heating surface H is concentrated on the front side.

[0028] An example of the operation of such a heating device 1 will now be described. The user places the elongated heating target C, which extends laterally, adjacent to or in contact with the heat generating surface H of the heating device 1, and connects the heating device 1 to a power source. Then, power is supplied to each heater 2, and each carbonaceous heating element 10 emits infrared rays. The heating target C is heated by the infrared rays. The heating target C may be arranged only on the front heating surface H side, or only on the rear heating surface H side, or on both the front and rear heating surface H sides.

[0029] When heating by the heating device 1 is completed, the user disconnects the power source. This cuts off the power supply to each heater 2, stops the infrared radiation from each carbonaceous heating element 10, and stops the heating of the heating target C by the infrared rays. In addition, a sensor may be provided to detect the temperature of at least one of the heaters 2 and the heating target C, and a control unit may be provided that is electrically connected to the sensor and each heater 2 to control each heater 2, and the control unit may control at least one of the on / off and output (heat generation amount, infrared radiation amount) of each heater 2 based on the temperature detected by the sensor. Also, a moving means may be provided to move the heating device 1 relative to the heating target C. Furthermore, instead of the moving means or together with the moving means, a transporting means may be provided to transport the heating target C relative to the heating device 1. The transporting means may be, for example, a reel that transports the long heating target C sequentially from the left carry-in side to the right carry-out side by winding it up adjacent to the heat generating surface H of the heating device 1. The carry-in side and the carry-out side may be reversed.

[0030] When replacement of the heater 2 is required, such as when the carbonaceous heating element 10 in any of the heaters 2 breaks due to its lifespan or the like, the user can quickly and easily replace the heater 2 by simply removing the heater 2 to be replaced upward from the electrode pin receiving hole 80 of the heating device 1 and inserting the connection part 14 (each electrode pin 42) of the new heater 2 into the electrode pin receiving hole 80. Furthermore, the resistance (heat generation amount, power supply) of some heaters 2 may be different from the resistance (heat generation amount, power supply) of other heaters 2, and the heating device 1 can operate with a mixture of such different types of heaters 2, allowing the user to adjust the heating pattern on the heating surface H.

[0031] Such a heating device 1 provides the following functions and effects. That is, the heater 2 includes a plurality of heaters 2 each having a carbonaceous heating element 10, and the heaters 2 are arranged in a state in which each carbonaceous heating element 10 extends in the vertical direction. Thus, a long heating surface H is formed by each carbonaceous heating element 10, providing a heating device 1 that can easily heat a long heating target C. In the heating device 1, some or all of the heaters 2 are separated from each other, and the distance between some or all of the heaters 2 is large, so that some or all of the heaters 2 do not have to be adjacent to each other. Even in this case, as long as one heating target C can pass through adjacent parts of the heaters 1, the effect of easily heating the long heating target C can be achieved.

[0032] Furthermore, the heaters 2 are adjacent to each other. Therefore, the heating device 1 is provided which can heat the long heating target C even more easily.

[0033] Moreover, the heater 2 has a connection part 14 electrically connected to a power source, and the connection part 14 is disposed at the lower end part of the heater 2. Therefore, it is easy to install each heater 2 in a state where the carbonaceous heating element 10 extends in the vertical direction. Furthermore, the heater 2 has a pair of carbonaceous heating elements 10, which are arranged in the same direction as the heaters 2 and are incorporated into a "U" shaped wiring that opens downward. Therefore, the heater 2 with the connection part 14 at the lower end is formed more efficiently.

[0034] In addition, each carbonaceous heating element 10 is plate-shaped and arranged with its surface facing the same direction, so that the direction of infrared rays radiated from each carbonaceous heating element 10 can be aligned, forming a heating surface H with directionality. Furthermore, the heater 2 includes upper and lower tubes 4 that cover the carbonaceous heating element 10. Thus, the upper and lower carbonaceous heating elements 10 are protected from physical contact and short circuit. In addition, the carbonaceous heating element 10 has a meandering shape, so that the resistance of the carbonaceous heating element 10, and therefore the amount of heat generated and the heat density, can be easily adjusted by adjusting the shape.

[0035] The above-described embodiment or modified examples of the present invention further include the following modified examples as appropriate. In the heating device 1, at least any of the number, material, and arrangement of various members or parts in the heating device 1 may be changed, such as by making the number of carbonaceous heating elements 10 in each heater 2 four. The change in the number of various members or parts may include making the number zero, that is, omitting various members or parts. [Explanation of symbols]

[0036] 1·· Heating device, 2·· Heater, 4·· Tube, 10·· Carbonaceous heating element, 14·· Connection part, H·· (long) heating surface.

Claims

1. a plurality of heaters each having a carbonaceous heating element, a wire connection, a tube, and an upper case; The heaters are arranged in a state in which the carbonaceous heating elements and the tubes extend in a vertical direction, Each of the heaters is adjacent to one another; The heater has a connection portion electrically connected to a power source, The connection portion is disposed at a lower end portion of the heater, Each of the heaters has a pair of the carbonaceous heating elements, The pair of carbonaceous heating elements in each of the heaters are arranged in the direction in which the heaters are arranged, and are incorporated into a "U"-shaped wiring that opens downward, and upper ends of the pair of carbonaceous heating elements are electrically connected to each other via the wiring connection part, Each of the heaters has a pair of the tubes, A pair of the tubes in each of the heaters covers corresponding ones of the pair of the carbonaceous heating elements, The upper ends of the pair of tubes and the connection parts of each of the heaters are housed in the upper case. A heating device characterized by:

2. Each of the carbonaceous heating elements is in the form of a plate, and is arranged with its surface facing in the same direction.

2. The heating device according to claim 1 .

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