Heater and heating device

Abstract

To provide a heater which has an excellent heating amount and a heat generation density, and a more efficiency construction, and provide a heating device with the heater.SOLUTION: In a heater 1, a carbonaceous heating generator 10 is arranged to each of U, V, and W phases in a star connection. The heater 1 comprises: a connection part 14 that is used for the connection with an external part; a front wiring part 12 that is not directly connected to the connection part 14; and a rear wiring part 16 that is directly connected to the connection part 14. In addition, the heater 1 comprises and an outer pipe 2 covering the carbonaceous heating generator 10, the front wiring part 12, and the rear wiring part 16. The outer pipe 2 includes a closed front end part. The front wiring part 12 is arranged into the closed front end part of the outer pipe 2. The connection part 14 is arranged to a rear end part that is different from the closed front end part in the outer pipe 2.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a heater capable of heating an object to be heated and a heating device provided with the heater.

Background Art

[0002] As an infrared heater, one described in Japanese Patent No. 4939961 (Patent Document 1) is known. In this infrared heater, two lead wires 8, 8 connected to each longitudinal end of the carbonaceous heating element 2 in the inner tube 3 are connected to the terminal bar 13, the conductive bar 16 between the outer tube 4 and the inner tube 3, and the terminal bar 18, respectively. This infrared heater can be energized to the carbonaceous heating element 2 via a pair of terminal bars 13, 18, and the carbonaceous heating element 2 is heated to red heat by this energization to generate infrared radiant heat.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above infrared heater, one carbonaceous heating element 2 in the inner tube 3 is energized via two lead wires 8, 8 connected to both longitudinal ends thereof. Therefore, there is room for improvement in the calorific value and heat generation density of the infrared heater. Further, when the terminal bar 18 is arranged on the same side as the terminal bar 13, a conductive bar 16 extending in the longitudinal direction is required between the outer tube 4 and the inner tube 3. When the terminal bars 13, 18 are arranged at different longitudinal ends unlike the above, in a heating device to which the infrared heater is attached, two terminal bar connection portions and wirings thereto are required.

[0005] Therefore, the main object of the present invention is to provide a heater with improved calorific value and heat generation density, and a heating device equipped with such a heater. Furthermore, another main object of the present invention is to provide a heater having a more efficient configuration, and a heating device equipped with such a heater.

Means for Solving the Problems

[0006] This specification discloses a heater. In this heater, one or more carbonaceous heating elements are arranged in each of three phases in a star connection or a delta connection. It exists. This heater further includes a connection part used for connection with the outside, a first wiring part not directly connected to the connection part, a second wiring part directly connected to the connection part, an inner tube covering each carbonaceous heating element, and an outer tube covering each carbonaceous heating element, each inner tube, the first wiring part, and the second wiring part. Each carbonaceous heating element extends in the longitudinal direction. The first wiring part is connected to the first end of each carbonaceous heating element, and the second wiring part is connected to the second end of each carbonaceous heating element. The outer tube has a closed end. The first wiring part is disposed within the closed end. The connection part is disposed at an end of the outer tube different from the closed end. An inert gas is enclosed inside the outer tube and inside each inner tube. On the other hand, this specification discloses a heating device. In this heating device, the above-mentioned heater is used.

Effects of the Invention

[0007] The main effect of the present invention is that a heater with improved calorific value and heat generation density, and a heating device equipped with such a heater are provided. Furthermore, another main effect of the present invention is that a heater having a more efficient configuration, and a heating device equipped with such a heater are provided.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0009] Hereinafter, examples of embodiments according to the present invention, together with modification examples thereof, will be described as appropriate with reference to the drawings. Note that the embodiments are not limited to the following examples and modification examples.

[0010] FIG. 1 is a perspective view showing the upper surface, right surface, and rear surface of the heater 1 according to this embodiment. FIG. 2 is a perspective view showing the lower surface, left surface, and front surface of the heater 1. FIG. 3 is an exploded perspective view of a part of the heater 1. FIG. 4 is a central cross-sectional view in the front-rear direction of the heater 1. The heater 1 is a lamp heater and includes an outer tube 2, a plurality (three) of inner tubes 3, and an energization unit 4. Note that the longitudinal direction of the heater 1 is defined as the front-rear direction, the direction intersecting the front-rear direction and being the main heat radiation direction in the heater 1 is defined as the up-down direction, and the direction intersecting the front-rear direction and the up-down direction (the width direction of the carbonaceous heating element 10) is defined as the left-right direction. Such a direction of the heater 1 is defined for convenience of explanation and may change depending on the movement and installation modes of various members and parts.

[0011] The outer tube 2 is made of quartz glass and has translucency. The outer tube 2 extends in the front-rear direction and is cylindrical with both front and rear ends closed. Note that the material of the outer tube 2 may be other than quartz glass as long as it allows infrared rays to pass through and has heat resistance. Also, the shape of the outer tube 2 may be other than cylindrical, such as a rectangular tube shape. The front end portion of the outer tube 2 is hemispherical. The rear end portion of the outer tube 2 is an outer tube plate-like portion 5 formed in a horizontal plate shape.

[0012] Each inner tube 3 is made of quartz glass and has translucency. Each inner tube 3 extends in the front-rear direction and is cylindrical with both front and rear ends open to allow fluid to pass through without passing internal members. At least one of the material and shape of at least any one of the inner tubes 3 can be changed in the same manner as the outer tube 2. The front end portion of each inner tube 3 is an inner tube front plate-like portion 7 formed in a horizontal plate shape. The rear end portion of each inner tube 3 is an inner tube rear plate-like portion 8 formed in a horizontal plate shape. Each inner tube 3 is disposed inside the outer tube 2. Inside the outer tube 2 and each inner tube 3, an inert gas such as argon gas is enclosed, suppressing deterioration due to oxidation of the energizing portion 4. Note that the enclosure of the inert gas may be omitted.

[0013] The energizing portion 4 includes a plurality (three) of carbonaceous heating elements 10, a front wiring portion 12 as a first wiring portion, a connecting portion 14, and a rear wiring portion 16 as a second wiring portion.

[0014] Each carbonaceous heating element 10 is a plate-like member extending in the longitudinal direction and spreading in the front-rear and left-right directions. Each carbonaceous heating element 10 is a carbonaceous plate. Each carbonaceous heating element 10 is in a horizontal posture. Note that at least one of the postures of each carbonaceous heating element 10 may be other than horizontal. Also, at least one of the shapes of each carbonaceous heating element 10 may be other than plate-like. In each carbonaceous heating element 10, slits 18 of the same length are alternately formed at equal intervals from both left and right sides over the entire portion except for the ends. Thus, each carbonaceous heating element 10 has a meandering shape. Note that the length of some of the slits 18 may be longer or shorter than the length of other slits 18. Also, the size between some of the slits 18 may be larger or smaller than the size between other slits 18. Each carbonaceous heating element 10 emits infrared rays and generates heat when energized. The resistance of each carbonaceous heating element 10 is adjusted according to the arrangement pattern of the slits 18 in each carbonaceous heating element 10, and the amount of infrared ray radiation is adjusted, thereby adjusting the amount of heat generation. For example, when the size between the slits 18 in the front and rear of each carbonaceous heating element 10 is made larger than the size between the slits 18 in the central portion of each carbonaceous heating element 10, the resistance in the central portion of each carbonaceous heating element 10 becomes larger than that in the front and rear, the amount of infrared ray radiation in the central portion of each carbonaceous heating element 10 becomes larger than that in the front and rear, the amount of heat generation in the central portion of each carbonaceous heating element 10 becomes larger than that in the front and rear, and the amount of infrared ray radiation in the central portion of each carbonaceous heating element 10 becomes larger than that in the front and rear. Each carbonaceous heating element 10 is lighter than a metal of the same size. Therefore, the heater 1 is lighter than a heater using a heating element made of metal of the same size. Also, since each carbonaceous heating element 10 emits infrared rays and heats a heating target by the infrared rays, the heater 1 can efficiently heat even a distant heating target and can heat a high-temperature heating target while suppressing a reduction in the amount of heat transfer. Further, since each carbonaceous heating element 10 instantaneously emits light (glows red) in response to the application of electric power, it is easy for the user to grasp the operating state of the heater 1.

[0015] Each carbonaceous heating element 10 is held in the inner tube 3 in a state where two are arranged on the upper side and one is arranged on the lower side. The central portion of each carbonaceous heating element 10 in the left-right direction is arranged in an inverted equilateral triangle shape when viewed from the rear side to the front side, mainly as shown in FIG. 4. The amount of infrared ray radiation from the upper surface and the lower surface, which are the surfaces of each carbonaceous heating element 10, is larger than the amount of infrared ray radiation from the front surface, the rear surface, the left surface, and the right surface, which are the thick surfaces of each carbonaceous heating element 10. That is, the infrared ray radiation of each carbonaceous heating element 10 is mainly made from the upper surface and the lower surface, and there is directivity in the heat radiation of each carbonaceous heating element 10. Furthermore, the central portions of the carbonaceous heating elements 10 may be arranged in an equilateral triangle shape, an isosceles triangle shape, or other triangular shapes when viewed from the rear to the front. Hereinafter, the arrangements of these central portions may be collectively referred to as the triangular central portion arrangements. Each carbonaceous heating element 10 may be arranged along a virtual equilateral triangle or isosceles triangle, etc. In this case, including this case and the triangular central portion arrangements, it may be referred to as the triangular arrangement of each carbonaceous heating element 10. If each carbonaceous heating element 10 is arranged along each side of a virtual polygon or orthogonal to each side of a virtual polygon in this way, the heat radiation in the heater 1 approaches non-directionality (omnidirectional uniformity). Also, one or more reflectors that reflect infrared rays may be provided inside at least one of the outer tube 2 and each inner tube 3. The reflectors may all be in contact with the inner wall of the outer tube 2 or each inner tube 3, or part or all of them may be separated from the inner wall. The reflectors may be arranged at least in the lower part of one of the outer tube 2 and each inner tube 3.

[0016] FIG. 5 is an enlarged front view of FIG. 2. The front wiring portion 12 has a front lead wire portion 20 and a front wiring connection portion 22 for each carbonaceous heating element 10. The front wiring portion 12 is connected to the front end portion (first end portion) of each carbonaceous heating element 10.

[0017] The front lead wire portion 20 has a front lead wire 24 for each carbonaceous heating element 10 and a connection portion 26. Each front lead wire 24 extends in the front-rear direction. Each front lead wire 24 is a conducting wire and does not have a non-conductive coating portion. Each front lead wire 24 passes through the inner tube front plate-like portion 7 of the corresponding inner tube 3. The front end portion of each front lead wire 24 is arranged inside the outer tube 2 and on the front side of the corresponding inner tube 3. The rear end portion of each front lead wire 24 is arranged inside the front portion of the corresponding inner tube 3. Furthermore, at least one of the front lead wires 24 may have a non-conductive coating portion. The connection part 26 is arranged inside the front end part of the outer tube 2 and electrically connects the front end parts of the respective front lead wires 24 to each other. The front end parts of the connection part 26 and the conductive parts of the respective front lead wires 24 are welded to each other. Incidentally, the front end parts of the connection part 26 and the conductive parts of the respective front lead wires 24 may be connected by caulking or the like instead of welding or together with welding.

[0018] Each front wiring connection part 22 is formed by a conductive plate bent at a plurality of locations and has an upper spacer part 32, a first bent part 33, an upper plate part 34, a pair of left and right second bent parts 35, a recessed part 36, a lower plate part 37, a third bent part 38, and a lower spacer part 39. The upper spacer part 32 has an upper semi-circular shape which is the upper part shape of the cross-section of the internal space of the inner tube 3 when viewed from the front. The first bent part 33 is arranged between the upper spacer part 32 and the upper plate part 34. The upper plate part 34 is in a horizontal posture. Each second bent part 35 is arranged between the upper plate part 34 and the lower plate part 37. The second bent part 35 is arranged at both ends in the left-right direction between the upper plate part 34 and the lower plate part 37. The recessed part 36 is arranged between the left and right second bent parts 35. The recessed part 36 is recessed rearward with respect to each second bent part 35. The lower plate portion 37 is in a horizontal posture. The lower plate portion 37 and the upper plate portion 34 are arranged on the rear sides of the respective second bending portions 35 and concave portions 36 and face each other. Between the lower plate portion 37 and the upper plate portion 34, the rear end portions of the corresponding front lead wires 24 are introduced through the concave portions 36, and due to this introduction and the contact of the rear end portions of the front lead wires 24 with at least one of the lower plate portion 37 and the upper plate portion 34, the front wiring connection portion 22 and the corresponding front lead wire 24 are electrically connected. Also, between the lower plate portion 37 and the upper plate portion 34, the front end portions of the corresponding carbonaceous heating elements 10 are introduced from the rear, and due to this introduction and the contact of the front end portions of the carbonaceous heating elements 10 with at least one of the lower plate portion 37 and the upper plate portion 34, the front wiring connection portion 22 and the corresponding carbonaceous heating element 10 are electrically connected. Therefore, the front lead wire 24 and the corresponding carbonaceous heating element 10 are electrically connected to each other via the front wiring connection portion 22. Note that the carbonaceous heating element 10 and the corresponding front lead wire 24 may be directly electrically connected. The third bending portion 38 is arranged between the lower plate portion 37 and the lower spacer portion 39. The lower spacer portion 39 has a lower semi-circular shape, which is the shape of the lower part of the cross-section of the internal space of the inner tube 3 when viewed from the front. Each front wiring connection portion 22 is arranged inside the front portion of the inner tube 3, and the thick portions of the upper spacer portion 32 and the lower spacer portion 39 contact the inner wall of the inner tube 3, thereby horizontally holding the corresponding carbonaceous heating element 10 inside the inner tube 3.

[0019] The front wiring portion 12 is not directly connected to the connection portion 14, which is a terminal used for connection to the outside. The front wiring portion 12 is arranged inside the closed front end portion of the outer tube 2.

[0020] FIG. 6 is an enlarged rear view of FIG. 2. The connection portion 14 has electrode pins 42 for each carbonaceous heating element 10 (phase) and a non-conductive electrode pin case 44. Each electrode pin 42 is made of metal, exhibits conductivity, extends in the front-rear direction, and is arranged side by side left and right. The electrode pin case 44 exhibits heat resistance. At the vertical center of the front part of the electrode pin case 44, a recessed part 48 that is recessed backward with respect to the top and bottom is formed. The vertical size of the recessed part 48 is the same as the vertical size (thickness) of the outer tube plate-like part 5, and the outer tube plate-like part 5 (except for the front end part) is contained within the recessed part 48. Note that the electrode pin case 44 may not be a component of the energizing part 4 or the connecting part 14, and may be a component independent of the energizing part 4 or the connecting part 14. Each electrode pin 42 is arranged behind the recessed part 48 and is held at the rear part of the electrode pin case 44. Each electrode pin 42 is a terminal of the heater 1 connected to an external power source. The rear end part of each electrode pin 42 is exposed to the outside. Note that the connecting part 14 may use a lead wire instead of the terminal part using the electrode pin 42 as a terminal. This lead wire may be integrated with the rear lead wire part 50 described later. Also, as the connecting part 14, other than those using the electrode pin 42 which is a terminal bar and other than those using a lead wire, may be used.

[0021] The rear wiring part 16 has a rear lead wire part 50 and a rear wiring connection part 52 for each carbonaceous heating element 10. The rear wiring part 16 is connected to the rear end part (second end part) of each carbonaceous heating element 10.

[0022] The rear lead wire part 50 has a rear lead wire 54 and a resistance element 56 for each carbonaceous heating element 10. Each rear lead wire 54 extends in the front-rear direction. Each rear lead wire 54 is a conducting wire and does not have a non-conductive coating part. Each rear lead wire 54 passes through the inner tube rear plate-like part 8 of the corresponding inner tube 3. The front end part of each rear lead wire 54 is arranged inside the rear part of the corresponding inner tube 3. The rear part of each rear lead wire 54 is inside the outer tube 2 and is arranged on the rear side of the corresponding inner tube 3. The rear end part of each rear lead wire 54 is electrically connected to the corresponding electrode pin 42. Note that at least any one of the rear lead wires 54 may have a non-conductive coating part. Each resistor element 56 is interposed in the corresponding rear lead wire 54. Each resistor element 56 is disposed within the outer tube plate-like portion 5. Each resistor element 56 adjusts at least one of the current and voltage to the corresponding carbonaceous heating element 10. The outer tube plate-like portion 5 is formed by deforming the rear end portion of the outer tube 2 into a plate shape in a state where each rear lead wire 54 and each resistor element 56 have passed through before formation. The degree of the sealing is preferably such that the size of the gap is 0.03 μm (micrometer) or more and 0.05 μm or less from the viewpoint of suppressing the permeation of oxygen molecules. Also, since the end portion of the inner tube 3 is opened to such an extent that the carbonaceous heating elements 10 etc. do not come out, while suppressing contact etc. between the carbonaceous heating elements 10, the increase in the internal pressure of the inner tube 3 that may occur in the case where the end portion is not opened and the breakage of the inner tube 3 based on this are suppressed.

[0023] Each rear wiring connection portion 52 is formed by a conductive plate bent at a plurality of locations, and has an upper spacer portion 62, a first bent portion 63, an upper plate portion 64, a pair of left and right second bent portions 65, a concave portion 66, a lower plate portion 67, a third bent portion 68, and a lower spacer portion 69. The upper spacer portion 62 has, when viewed from the rear, the upper shape of the cross section of the internal space of the inner tube 3, that is, a semi-circular shape. The first bent portion 63 is disposed between the upper spacer portion 62 and the upper plate portion 64. The upper plate portion 64 is in a horizontal posture. Each second bent portion 65 is disposed between the upper plate portion 64 and the lower plate portion 67. The second bent portion 65 is disposed at both ends in the left-right direction between the upper plate portion 64 and the lower plate portion 67. The concave portion 66 is disposed between the left and right second bent portions 65. The concave portion 66 is recessed forward with respect to each second bent portion 65. The lower plate portion 67 is in a horizontal posture. The lower plate portion 67 and the upper plate portion 64 are arranged in front of the respective second bending portions 65 and the concave portions 66 and face each other. Between the lower plate portion 67 and the upper plate portion 64, the front end portions of the corresponding rear lead wires 54 are introduced through the concave portions 66. By this introduction and the contact of the front end portions of the rear lead wires 54 with at least one of the lower plate portion 67 and the upper plate portion 64, the rear wiring connection portion 52 and the corresponding rear lead wire 54 are electrically connected. Also, between the lower plate portion 67 and the upper plate portion 64, the rear end portions of the corresponding carbonaceous heating elements 10 are introduced from the front. By this introduction and the contact of the rear end portions of the carbonaceous heating elements 10 with at least one of the lower plate portion 67 and the upper plate portion 64, the rear wiring connection portion 52 and the corresponding carbonaceous heating element 10 are electrically connected. Therefore, the rear lead wire 54 and the corresponding carbonaceous heating element 10 are electrically connected to each other via the rear wiring connection portion 52. Note that the carbonaceous heating element 10 and the corresponding rear lead wire 54 may be directly electrically connected. The third bending portion 68 is arranged between the lower plate portion 67 and the lower spacer portion 69. When viewed from the rear, the lower spacer portion 69 has a lower half-circular shape, which is the lower shape of the cross-section of the internal space of the inner tube 3. Each rear wiring connection portion 52 is arranged inside the rear portion of the inner tube 3. The thick portions of the upper spacer portion 62 and the lower spacer portion 69 contact the inner wall of the inner tube 3, thereby horizontally holding the corresponding carbonaceous heating element 10 inside the inner tube 3.

[0024] The rear wiring portion 16 is directly connected to the connection portion 14, which is a terminal used for connection to the outside. More specifically, the rear lead wire portion 50 of the rear wiring portion 16 is directly connected to each electrode pin 42 of the connection portion 14. The rear wiring portion 16 is arranged inside the closed rear end portion of the outer tube 2. The rear wiring portion 16 is directly connected to each electrode pin 42 of the connection portion 14 that is partially exposed to the outside.

[0025] Such an energization portion 4 forms a circuit as shown in FIG. 7. Note that in FIG. 7, all the resistance elements 56 are omitted. That is, each carbonaceous heating element 10 as a resistor is star-connected. Each carbonaceous heating element 10 is energized when each electrode pin 42 is connected to a three-phase AC power supply, and emits infrared rays to generate heat. More specifically, assuming that each electrode pin 42 is in the U, V, and W phases in order, and is connected to the R, S, and T phases of the three-phase AC power supply in order, each carbonaceous heating element 10 is energized, emits infrared rays, and generates heat.

[0026] For example, the heating density of the heater 1 that can be driven by a 200V three-phase AC power supply becomes sufficiently larger than the heating density of the carbonaceous heating element 10 with 100V single-phase AC. Also, the power per unit area (per unit length) of the carbonaceous heating element 10 in the heater 1 that can be driven by a 200V three-phase AC power supply becomes larger than the power per unit area (per unit length) of the carbonaceous heating element 10 with 100V single-phase AC, and the time (rise time) from the start point of power supply in the heater 1 to the point of reaching the desired heat generation amount becomes shorter than the rise time with 100V single-phase AC. Furthermore, when obtaining the same heating density between the carbonaceous heating element 10 of the heater 1 that can be driven by a 200V three-phase AC power supply and the carbonaceous heating element 10 driven by 100V single-phase AC, the current flowing through the carbonaceous heating element 10 of the heater 1 becomes smaller than the current flowing through the carbonaceous heating element 10 with 100V single-phase AC. Therefore, the durability of the carbonaceous heating element 10 of the heater 1 is superior to the durability with 100V single-phase AC. In addition, in the heater 1 driven by a 200V three-phase AC power supply, even if one carbonaceous heating element 10 is disconnected, the heater 1 continues to light with a voltage of 200V in total of 100V applied to the remaining two carbonaceous heating elements 10 and does not immediately go out.

[0027] FIG. 8 and FIG. 9 are perspective views of a heating device 101 using a plurality (three) of heaters 1. Note that the number of heaters 1 may be two or less including one, or may be four or more. The object to be heated by the heating device 101 may be anything. For example, it is at least one of a material and a mold during product manufacturing, a gas such as air for at least one of air conditioning and drying, or food. The heating device 101 includes a housing 102, a device-side connection portion 104, a conducting wire portion 106, and a power supply connection portion 108.

[0028] The housing 102 is made of metal, is open at the top and bottom, and has a frame shape with an upper opening and a lower opening. Note that part or all of the upper surface or the lower surface of the housing 102 may not be open and may be covered with an upper closing portion or a lower closing portion. The housing 102 holds the heaters 1 in a state of extending forward and backward, arranged side by side left and right with respect to each other. The housing 102 includes a plurality (two) of housing side portions 110, a front cover 112, a front handle 114, a plurality (two) of front legs 116, a rear cover 118, a rear handle 120, a conducting wire end cover 122, and a plurality (two) of rear legs 124.

[0029] Each housing side portion 110 is in the shape of a plate having a plurality of holes, and extends in the front-rear, upper-lower directions. The front cover 112 consists of an upper portion and a lower portion, and covers the front end portions of the respective heaters 1. The front end portions of the corresponding housing side portions 110 are fixed to both the left and right sides of the front cover 112. Note that the front cover 112 may hold at least any one of the heaters 1. The front handle 114 is in a "U" shape when viewed from above, and is attached to the front surface of the front cover 112. The front handle 114 protrudes forward from the front cover 112. Each front leg 116 is attached to the left and right of the front surface of the front cover 112, and extends forward and downward. The lower surface of each front leg 116 forms the lowermost surface of the heating device 101.

[0030] The rear cover 118 consists of an upper portion and a lower portion, and covers the rear end portions of the respective heaters 1 and the device-side connection portion 104. The rear portions of the corresponding housing side portions 110 are fixed to both the left and right sides of the rear cover 118. Note that the rear cover 118 may hold at least any one of the heaters 1. The rear handle 120 is in an inverted "U" shape when viewed from the front, and is attached to the upper surface of the rear cover 118. The rear handle 114 protrudes upward from the rear cover 118. The wire end cover 122 is in the form of a bent plate having an upper part and a rear part, has a plurality of slits, and covers the rear part of the device-side connection part 104 and the front end part of the wire part 106. The rear end parts of the corresponding housing side parts 110 are fixed to both the left and right sides of the wire end cover 122. Each rear leg part 124 is attached to the left and right of the rear surface of the wire end cover 122 and extends rearward and downward. The lower surface of each rear leg part 124 is the lowermost surface of the heating device 101.

[0031] The device-side connection part 104 has a heater electrode pin receiving part (not shown) for each heater 1. Each heater electrode pin receiving part has a block-shaped heater electrode pin receiving part main body and a heater electrode pin receiving hole for each electrode pin 42 extending rearward from its front surface. Each heater electrode pin receiving hole receives the corresponding electrode pin 42 and is electrically connected to the electrode pin 42 at that time. Note that a plurality of device-side connection parts 104 may be provided.

[0032] The wire part 106 includes a plurality (three) of wires (not shown), a covering 130 that collectively encloses each wire, and a box part 132. The three wires in the covering 130 are an R wire connected to each heater electrode pin receiving hole of the R phase into which the electrode pin 42 of the U phase of each heater 1 enters, an S wire connected to each heater electrode pin receiving hole of the S phase into which the electrode pin 42 of the V phase of each heater 1 enters, and an R wire connected to each heater electrode pin receiving hole of the T phase into which the electrode pin 42 of the W phase of each heater 1 enters. Note that the connection between each heater electrode pin receiving hole and the wire may be in parallel, in series, or in other modes. The box part 132 is interposed between the covering 130 and each wire and adjusts the power supplied to each heater 1. Note that the wire part 106 may be directly connected to the energization part 4 of the heater 1 without passing through a terminal. In this case, the device-side connection part 104 as a terminal receiver is omitted. At least one of the device-side connection part 104 and the wire part 106 may be other than the above.

[0033] The power connection part 108 is connected to a three-phase AC power supply (not shown). The power connection part 108 has an R terminal (not shown) connected to the R phase of the three-phase AC power supply and connected to the R wire of the wire part 106, a T terminal (not shown) connected to the T phase of the three-phase AC power supply and connected to the T wire of the wire part 106, and an S terminal (not shown) connected to the S phase of the three-phase AC power supply and connected to the S wire of the wire part 106. In addition, the heating device 101 may be provided with a switch for turning the power on and off.

[0034] Hereinafter, an operation example of such a heater 1 and heating device 101 will be described. The user makes the opening of the housing 102 in the heating device 101 adjacent to or in contact with one or more objects to be heated, and connects the power connection part 108 to the three-phase AC power supply. Then, power is supplied to each heater 1, and each carbonaceous heating element 10 emits infrared rays. The object to be heated is heated by the infrared rays. In addition, the object to be heated may be arranged only above the upper opening of the housing 102, may be arranged only below the lower opening, or may be arranged on both the upper side of the upper opening and the lower side of the lower opening.

[0035] When the heating by the heating device 101 is completed, the user disconnects the connection of the power connection part 108 to the three-phase AC power supply. Then, the supply of power to each heater 1 is cut off, the emission of infrared rays from each carbonaceous heating element 10 stops, and the heating of the object to be heated by the infrared rays stops. Furthermore, a sensor for detecting at least one of the temperature of each heater 1 and the object to be heated, and a control unit electrically connected to the sensor and each heater 1 to control each heater 1 may be provided. The control unit may control at least one of the on / off and output (heat generation amount, infrared radiation amount) of each heater 1 based on the temperature detected by the sensor. Also, a moving means for moving the heating device 101 relative to the object to be heated may be provided. Further, instead of or together with the moving means, a conveying means for conveying the object to be heated relative to the heating device 101 may be provided. The conveying means may be, for example, a conveyor for conveying the object to be heated to an adjacent portion of the heater 1 of the heating device 101, or a conveyor for conveying the object to be heated from the loading portion through the adjacent portion of the heater 1 to the unloading portion.

[0036] When the carbonaceous heating element 10 in any of the heaters 1 breaks due to, for example, the life being up, etc., and the heater 1 needs to be replaced, the user can appropriately remove the front cover 112 and then pull out the heater 1 to be replaced forward from the device-side connection portion 104 of the heating device 101, and simply insert the connection portion 14 (each electrode pin 42) of the new heater 1 into the device-side connection portion 104 (the corresponding heater electrode pin receiving hole) in a short time. Also, since each heater 1 can be driven by three-phase alternating current alone, even if some heaters 1 are removed from the heating device 101, the heating device 101 can still operate. The user can select the number of heaters 1, and can adjust the heat generation amount and power consumption of the heating device 101. Furthermore, the resistance (heat generation amount, supplied power) of some heaters 1 may be made different from the resistance (heat generation amount, supplied power) of other heaters 1. In the heating device 101, the mixed operation of such different types of heaters 1 is possible, and the user can adjust the heat generation pattern.

[0037] Such heaters 1 and heating device 101 have the following effects. That is, in the heater 1, the carbonaceous heating elements 10 are respectively arranged in the U, V, and W phases in a star connection. Therefore, by being connected to a three-phase AC power supply, a heater 1 is provided in which the amount of heat generation and the heat generation density are improved as compared with the case of being connected to a single-phase AC.

[0038] Furthermore, the heater 1 includes a connection part 14 used for connection to the outside, a front wiring part 12 not directly connected to the connection part 14, and a rear wiring part 16 directly connected to the connection part 14. Therefore, wiring extending in the longitudinal direction from the end part on the side opposite to the connection part 14 in the carbonaceous heating element 10 to the connection part 14 is unnecessary, and a heater 1 having a more efficient configuration is provided. Also, the carbonaceous heating element 10 extends in the longitudinal direction, the front wiring part 12 is connected to the front end part of the carbonaceous heating element 10, the rear wiring part 16 is connected to the rear end part of the carbonaceous heating element 10, and further, the heater 1 includes an outer tube 2 covering the carbonaceous heating element 10, the front wiring part 12, and the rear wiring part 16. The outer tube 2 has a closed front end part, the front wiring part 12 is disposed inside the closed front end part of the outer tube 2, and the connection part 14 is disposed at the rear end part different from the closed front end part of the outer tube 2. Therefore, the carbonaceous heating element 10, the front wiring part 12, and the rear wiring part 16 are more efficiently arranged inside the outer tube 2 that protects the carbonaceous heating element 10, the front wiring part 12, and the rear wiring part 16.

[0039] Furthermore, the heater 1 includes an inner tube 3 covering the carbonaceous heating element 10. Therefore, the carbonaceous heating element 10 is protected from physical contact and short circuit. Also, the carbonaceous heating element 10 has a meandering shape. Therefore, by adjusting the shape, the resistance of the carbonaceous heating element 10, and thus the amount of heat generation and the heat generation density, can be easily adjusted. Furthermore, the three sets of carbonaceous heating elements 10 are arranged in a triangular shape. Therefore, the diameter of the virtual cylinder into which the group of carbonaceous heating elements 10 can enter becomes smaller even when at least one of the upper surface and the lower surface, which are the main infrared radiation surfaces in each carbonaceous heating element 10, are appropriately aligned with each other. Therefore, the heater 1 becomes more compact while considering the amount of heat generation and the heat generation density.

[0040] Moreover, the heater 1 includes each carbonaceous heating element 10 that generates heat by a three-phase AC power supply. Thus, the heater 1 with improved calorific value and heat generation density is provided. In addition, in the heating device 101, the above-described heater 1 is used. Thus, the heating device 101 with improved calorific value and heat generation density and having a more efficient configuration is provided.

[0041] Note that the above-described embodiment or modification example of the present invention may further have the following modification examples as appropriate. In the heating device 101, at least any one of the number, material, and arrangement of various members or parts in the heater 1 and the heating device 101 may be changed, such as arranging a part or all of each heater 1 to extend in the left-right direction. The change in the number of various members or parts may include setting it to 0, that is, omitting various members or parts.

Explanation of Reference Numerals

[0042] 1 ··· Heater, 2 ··· Outer tube, 4 ··· Inner tube, 10 ··· Carbonaceous heating element, 12 ··· Front wiring part (first wiring part), 14 ··· Connection part, 16 ··· Rear wiring part (second wiring part), 101 ··· Heating device.

Claims

1. One or more carbonaceous heating elements are respectively arranged in three phases in a star connection or a delta connection, furthermore, a connection part used for connection with the outside, a first wiring part not directly connected to the connection part, a second wiring part directly connected to the connection part, an inner tube covering each of the carbonaceous heating elements, an outer tube covering each of the carbonaceous heating elements, each of the inner tubes, the first wiring part, and the second wiring part, and is provided with, each of the carbonaceous heating elements extends in the longitudinal direction, the first wiring part is connected to the first end of each of the carbonaceous heating elements, and the second wiring part is connected to the second end of each of the carbonaceous heating elements, the outer tube has a closed end, the first wiring part is arranged inside the closed end, the connection part is arranged at an end of the outer tube different from the closed end, an inert gas is enclosed inside the outer tube and inside each of the inner tubes A heater characterized by this.

2. The carbonaceous heating element is plate-shaped The heater according to claim 1, characterized by this.

3. The three sets of the carbonaceous heating elements are arranged in a triangular shape The heater according to claim 1, characterized by this.

4. The heater according to any one of claims 1 to 3 is used A heating device characterized by this.

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