WO2024176889A1 - Heater device, heating part, and method for manufacturing heater device - Google Patents

Abstract

According to the present invention, a switching device for switching between passing electric current and not passing electric current through a heating body is positioned relative to an object to be heated. This heater device (1) is disposed along the outer surface of an object to be heated (pipe 100), and is provided with: a heating body (40) that generates heat upon passing of electric current; a switching device (thermostat 50) for switching between passing electric current and not passing electric current through the heating element according to the temperature of the object to be heated; and a heat insulation material (30) disposed between an inner skin material (10) and an outer skin material (20). The heat insulation material has a housing part (31) that forms a space for housing the switching device.

Description

Heater device, heating unit, and method for manufacturing heater device

The present invention relates to a heater device or heating unit that heats an object to be heated, and a method for manufacturing this heater device.

The heater device described in Patent Document 1 is provided with a bimetal thermostat that cuts off the current when a first temperature is reached and restores the current when the temperature drops to a second temperature. The restoration temperature of the bimetal thermostat is set to 0°C or lower. This heater device is used as a mantle heater for heating piping.

JP 2006-286316 A

Patent Document 1 describes the placement of a bimetal thermostat inside the heater device, but does not disclose any specific placement structure for the bimetal thermostat.

If you want the thermostat to operate according to the temperature of the pipes, it needs to be kept in contact with the pipes. If the thermostat is misaligned inside the heater device and separates from the pipes, it will be difficult for the heat from the pipes to be transferred to the thermostat, and the thermostat may not operate normally.

The first invention of this application is a heater device that is placed along the outer surface of an object to be heated, and includes a heating element that generates heat when electricity is applied, a switching device that switches the heating element between energized and de-energized depending on the temperature of the object to be heated, and a heat insulating material that is placed between the inner and outer skin materials. The heat insulating material has a storage portion that forms a space to store the switching device.

The storage section can be a through hole that penetrates the insulating material, or a recess that opens toward the outer surface of the heated object. When the heating element includes a heater wire, the heater wire can be arranged on the surface of the insulating material along a predetermined arrangement pattern, and a portion of the heater wire can be arranged along the storage section at a position a predetermined distance away from the storage section.

The heating element can be composed of a heater wire and a support sheet to which the heater wire is fixed. An opening can be formed in the support sheet to allow the switching device to pass through, and a flange portion provided on the switching device can be attached to the support sheet. Here, an inorganic fiber sheet is used as the support sheet, and the edges of the opening in the support sheet can be sewn with reinforcing thread.

The heater device can be provided with a temperature sensor for detecting the temperature of the heated object. The temperature sensor can be composed of a detection section that detects the temperature of the heated object and a wiring section extending from the detection section, and the tip of the temperature sensor including the detection section can be exposed to the heated object. Here, when viewed from the lamination direction of the inner and outer skin materials, the tip of the temperature sensor can be positioned so as not to overlap with the heater wire of the heating element. This prevents the heat of the heater wire from being transferred to the tip of the temperature sensor (particularly the detection section), making it easier for the detection section to detect the temperature of the heated object.

The wiring of the temperature sensor can be arranged along a detour path within the layered surface of the inner and outer skin materials. The detour path is a path that detours from the shortest path connecting the starting point and the ending point located within the layered surface. By arranging the wiring along the detour path, it is possible to suppress the wiring from shifting even if a tensile force acts on the wiring.

The second invention of the present application is a heating section arranged along the outer surface of the heated object, and includes a heating element that generates heat when electricity is applied, a switching device that switches the heating element between energized and de-energized depending on the temperature of the heated object, and a heat insulating material arranged between the inner and outer skin materials. The heat insulating material has a housing portion that forms a space to house the switching device.

The third invention of this application is a manufacturing method for a heater device that is placed along the outer surface of an object to be heated. Here, the heater device has a heating element that generates heat when electricity is applied, a switching device that switches between energizing and de-energizing the heating element depending on the temperature of the object to be heated, and a heat insulating material that is placed between the inner and outer skin materials. In the manufacturing method for the heater device, a storage section with a predetermined space is formed in the heat insulating material, and the switching device is stored in this storage section.

In the first to third inventions of this application, a thermostat can be used as the switching device.

According to the present invention, since the insulating material housing contains the switching device, the switching device can be positioned in the heater device. This allows the switching device to be in contact with the object to be heated without being misaligned, and the heat of the object to be heated can be efficiently transferred to the switching device. Furthermore, the switching device can be operated appropriately according to the temperature of the object to be heated.

FIG. 2 is a perspective view showing a structure of a heater device attached to a pipe. FIG. FIG. FIG. 11 is a cross-sectional view showing a structure in which a thermostat is embedded in a heater device. FIG. 2 is a schematic diagram of the insulation showing the portion that houses the thermostat. 5A and 5B are diagrams illustrating a structure for fixing a thermostat to a seat and the positional relationship between the thermostat and a heater wire. 5A and 5B are diagrams illustrating a structure for fixing a thermostat to a seat and the positional relationship between the thermostat and a heater wire. 5A and 5B are diagrams illustrating the positional relationship between the tip of a temperature sensor and a heater wire. 11 is a diagram illustrating a detour route when arranging a wiring portion of a temperature sensor. FIG.

First Embodiment
The heater device according to the first embodiment of the present invention is attached to the outer circumferential surface of a pipe and heats the inside of the pipe. For example, the inside of the pipe through which gas flows can be heated to prevent by-products and exhaust gas from condensing and depositing. Note that the heater device according to the present embodiment is not limited to heating pipes, and may be capable of heating an object to be heated.

FIG. 1 is a perspective view showing the configuration of the heater device 1 attached to a cylindrical pipe 100. In FIG. 1, the X-axis, Y-axis, and Z-axis are mutually perpendicular axes, and the pipe 100 extends in the X-axis direction. Note that in this embodiment, an example in which the heater device 1 is attached to a pipe 100 extending in the X-axis direction is described, but the heater device 1 can also be attached to a bent pipe 100. In this case, the heater device 1 can be formed into a bent shape so as to fit along the bent portion of the pipe 100.

The heater device 1 is disposed along the circumferential direction of the pipe 100, and has a pair of butt joints 1A, 1B that are butted against each other in the circumferential direction of the pipe 100. The heater device 1 is bent along the outer peripheral surface of the pipe 100, and the pair of butt joints 1A, 1B are butted against each other, so that the outer peripheral surface of the pipe 100 can be covered by the heater device 1.

The heater device 1 has an inner skin 10 that contacts the outer surface of the pipe 100, an outer skin 20 that forms the outer surface of the heater device 1, and an insulating material 30 that is arranged between the inner skin 10 and the outer skin 20.

The inner skin material 10 and the outer skin material 20 may be made of resin and may have a porous structure. The inner skin material 10 and the outer skin material 20 may be made of the same type of resin, or may be made of different types of resin.

Examples of resins that form the inner skin material 10 and the outer skin material 20 include PTFE (polytetrafluoroethylene), PFA (perfluoroalkoxyalkane), FEP (fluorinated ethylene propylene), PCTFE (polychlorotrifluoroethylene), ETFE (ethylene tetrafluoroethylene), ECTFE (ethylene chlorotrifluoroethylene), and PVDF (polyvinylidene fluoride). Thermoplastic resins such as polyamide, polycarbonate, polyacetal, polybutylene terephthalate, modified polyphenylene ether, polyphenylene sulfide, polysulfone, polyethersulfone, polyarylate, polyetheretherketone, polyphthalamide, polyimide, polyetherimide, and polymethylpentene can also be used. In addition, fluororesin fiber cloth (woven fabric) made by weaving the above-mentioned fluororesin fibers, inorganic fiber cloth (woven fabric) made of inorganic fibers such as glass fiber, silica fiber, alumina fiber, and silica alumina fiber, fluororesin-coated inorganic fiber cloth made by coating inorganic fiber cloth with a fluororesin, and silicone resin-coated inorganic fiber cloth made by coating inorganic fiber cloth with a silicone resin can be used.

A heating element 40 is disposed between the inner skin material 10 and the insulating material 30. The heating element 40 has a heater wire 41 that generates heat when electricity is passed through it, and a support sheet 42 to which the heater wire 41 is sewn. The heater wire 41 can be disposed along a predetermined arrangement pattern so that the entire area of the pipe 100 covered by the heater device 1 can be heated evenly. An end of the heater wire 41 is connected to a cable (not shown), which is pulled out to the outside of the heater device 1 and connected to a power source (not shown) disposed outside the heater device 1. The heater wire 41 can be made to generate heat by passing electricity from the power source through the heater wire 41.

The support sheet 42 is a sheet-like member formed of inorganic fibers such as glass fiber, ceramic fiber, and silica fiber. The heating element 40 can be positioned so that the support sheet 42 contacts the inner skin material 10 and the heater wire 41 is located between the support sheet 42 and the insulation material 30. This results in the heater wire 41 being positioned on the surface of the insulation material 30.

The support sheet 42 can be constructed of a single layer, or can be constructed as a laminate of multiple layers. Here, the multiple layers that make up the laminate can be made of the same type of material, or they can be made of different types of material. The support sheet 42 can also be constructed by stacking multiple layers made of the same type of material and at least one layer made of a different material.

The heat insulating material 30 can be formed, for example, from inorganic or organic fibers, and is preferably formed from a material that is non-flammable or flame-retardant. Examples of inorganic fibers that can be used include glass fibers, ceramic fibers, and silica fibers. Here, the inorganic fibers can be needled and shaped using an inorganic binder such as colloidal silica, alumina sol, or sodium silicate. On the other hand, examples of organic fibers that can be used include fibers made of aramid, polyamide, or polyimide.

The insulating material 30 can be in contact with the inner surface of the outer skin material 20, but a sheet (not shown) can also be placed between the insulating material 30 and the outer skin material 20. This sheet can be made of the same material as the support sheet 42 described above, and can be composed of one layer or multiple layers.

A temperature sensor (not shown) that detects the temperature of the pipe 100 can be attached at any location on the heater device 1. The temperature of the pipe 100 can be maintained at a desired temperature by controlling the flow of electricity to the heater wire 41 based on the temperature detected by the temperature sensor. The number of temperature sensors can be determined as appropriate.

The heater device 1 is provided with a thermostat (switching device) 50 as shown in Figures 2 and 3. The thermostat 50 is a bimetal thermostat that switches the heater wire 41 between energized and de-energized depending on the temperature of the pipe 100. The thermostat 50 is provided so as to be in contact with the outer peripheral surface of the pipe 100, so that the heat of the pipe 100 is transferred to the thermostat 50. This allows the thermostat 50 to operate depending on the temperature of the pipe 100.

In this embodiment, the thermostat 50 is in direct contact with the outer peripheral surface of the pipe 100, but this is not limited thereto, and other members may be interposed between the thermostat 50 and the pipe 100. Even in this case, it is sufficient that the heat of the pipe 100 is transferred to the thermostat 50 via the interposed member. Meanwhile, other than the thermostat 50, it is also possible to use a device that can switch the heater wire 41 between energized and de-energized depending on the temperature of the object to be heated (such as the pipe 100).

The structure of the thermostat 50 (one example) will be described using Figures 2 and 3. Figure 2 is a side view of the thermostat 50, and Figure 3 is a bottom view of the thermostat 50 as viewed from the direction of the arrow D1 shown in Figure 2. Note that the structure of the thermostat 50 is not limited to the structure shown in Figures 2 and 3.

A bimetal (not shown) is placed inside the thermostat 50, and the bimetal changes shape in response to temperature to switch the switch on and off. When the switch is on, electricity is allowed to flow to the heater wire 41, and when the switch is off, electricity is cut off to the heater wire 41.

The thermostat 50 has a pair of terminals 51 to which the heater wire 41 is connected, and a pair of flanges 52 for fixing the thermostat 50. The pair of terminals 51 are connected to a switch that is switched on/off by the bimetal described above. As shown in FIG. 3, an opening 52a is formed in each flange 52, and the thermostat 50 can be fixed to the support sheet 42 by threading a thread through the opening 52a and sewing the thread to the support sheet 42.

In this embodiment, the thermostat 50 is fixed to the support sheet 42 using thread, but this is not limited to this. In other words, as long as the thermostat 50 can be fixed to the support sheet 42, for example, the flange 52 of the thermostat 50 can be fixed to the support sheet 42 using an adhesive. Furthermore, even if the thermostat 50 does not have a flange 52, it can be fixed to the support sheet 42 by using a known fixing means (for example, an adhesive).

FIG. 4 is a cross-sectional view showing the thermostat 50 fixed to the support sheet 42. The support sheet 42 has an opening 42a through which the thermostat 50 passes, and the inner skin material 10 also has an opening 11 through which the thermostat 50 passes. This allows the thermostat 50 to come into contact with the outer circumferential surface of the pipe 100.

The insulating material 30 is provided with a storage section 31 that stores a portion of the thermostat 50. As shown in FIG. 5, the storage section 31 is a through hole that penetrates the insulating material 30, and is formed in a shape that follows the outer shape of the thermostat 50. Here, the storage section 31 does not need to strictly follow the outer shape of the thermostat 50, as long as at least a portion of the storage section 31 is in contact with the outer surface of the thermostat 50 to position the thermostat 50.

As shown in FIG. 4, the flange 52 of the thermostat 50 is disposed between the support sheet 42 and the inner skin material 10, and is sewn to the support sheet 42 as described above. The thermostat 50 can also be positioned by sewing the flange 52 to the support sheet 42.

Figure 6 shows an example of the flange 52 sewn to the support sheet 42, and is a view of the thermostat 50 as viewed from the direction of the arrow D2 shown in Figure 4. The inner skin material 10 shown in Figure 4 is omitted in Figure 6. Figure 7 shows the thermostat 50 as viewed from the direction of the arrow D3 shown in Figure 4, and the insulating material 30 is omitted in Figure 7.

As shown in FIG. 6, a thread 61 is threaded through the opening 52a of the flange 52, and the thread 61 is sewn to the support sheet 42. In addition, a reinforcing thread 62 is sewn to the support sheet 42 along the edge of the opening 42a, ensuring the strength of the opening 42a.

As shown in FIG. 7, the heater wire 41 is arranged on the support sheet 42 so as to avoid the area in which the thermostat 50 is arranged. Specifically, the heater wire 41 is arranged along the opening 42a of the support sheet 42 at a position a predetermined distance away from the opening 42a. For example, the heater wire 41 can be fixed to the support sheet 42 by sewing a thread (not shown) into the support sheet 42 so that the thread presses the heater wire 41 against the support sheet 42.

By arranging the heater wire 41 as described above, it is possible to make it difficult for the heat generated from the heater wire 41 to be transmitted to the thermostat 50, and it is possible to prevent the thermostat 50 from malfunctioning due to the heat from the heater wire 41.

In the area of the support sheet 42 where the thermostat 50 is not arranged, the heater wire 41 can be arranged according to a predetermined arrangement pattern so that the heat from the heater wire 41 can be easily transferred to the entire pipe 100. For example, the heater wire 41 can be arranged on the surface of the support sheet 42 so that the heater wire 41 is folded back and aligned at a predetermined interval. Here, when efficiently transferring the heat of the heater wire 41 to the entire pipe 100, the interval of the heater wire 41 described above tends to be smaller than the outer diameter of the thermostat 50. In this case, the heater wire 41 and the thermostat 50 will interfere with each other, so it is meaningful to arrange the heater wire 41 along the opening 42a as described above.

In this embodiment, the storage section 31 of the insulating material 30 is formed to conform to the outer shape of the thermostat 50 and stores the thermostat 50, so that the thermostat 50 can be positioned in the heater device 1. This allows the thermostat 50 to be in contact with the piping 100 without being misaligned, and the heat of the piping 100 can be efficiently transferred to the thermostat 50. The thermostat 50 can then be operated appropriately according to the temperature of the piping 100.

In this embodiment, the storage section 31 penetrates the insulation material 30, but this is not limited to the above. Specifically, the storage section 31 may be a recess that opens toward the pipe 100 without penetrating the insulation material 30. The side of this recess is formed in a shape that follows the outer side of the thermostat 50. Even when the thermostat 50 is stored in the recess, the effect of this embodiment described above can be obtained. When the thermostat 50 is stored in the recess, the terminal 51 of the thermostat 50 is located on the bottom side of the recess, so a passage for passing the heater wire 41 connected to the terminal 51 can be formed in the insulation material 30.

Second Embodiment
A second embodiment of the present invention will be described below. Here, members having the same functions as those described in the first embodiment will be denoted by the same reference numerals and detailed description thereof will be omitted.

This embodiment relates to the placement of a temperature sensor that detects the temperature of the pipe 100. Here, a thermocouple can be used as the temperature sensor. The placement of the temperature sensor will be explained below with reference to FIG. 8.

FIG. 8 is a diagram of the inner skin material 10 unfolded, as viewed from the side of the pipe 100, showing a partial area of the inner skin material 10. As described in the first embodiment, the heating element 40 is layered on the inner skin material 10, but FIG. 8 shows the positional relationship of the temperature sensor 200 and the heater wire 41 as viewed from the layering direction of the inner skin material 10 and the heating element 40 (the direction perpendicular to the paper surface of FIG. 8).

The temperature sensor 200 has a detection section 210 that detects the temperature of the pipe 100, and a wiring section 220 that extends from the detection section 210. A tip section 230 of the temperature sensor 200 including the detection section 210 is exposed to the outer surface of the pipe 100 in order to detect the temperature of the pipe 100. The tip section 230 is disposed along the surface of the inner sheath material 10 (the surface that contacts the pipe 100) and is fixed to the inner sheath material 10 using thread (not shown) or the like. The wiring section 220 is bent at the base end position P10 of the tip section 230 and extends to the back side of the paper in FIG. 8. In other words, the wiring section 220 excluding the tip section 230 extends to the outside of the heater device 1 and is connected to equipment disposed outside the heater device 1.

As can be seen from FIG. 8, the tip 230 of the temperature sensor 200 is positioned so as not to overlap with the heater wire 41. Specifically, the tip 230 is positioned along the direction in which the heater wire 41 extends (the up-down direction in FIG. 8), and is positioned between the two heater wires 41 that are folded back. The tip 230 is also positioned away from the folded back portion of the heater wire 41.

In this embodiment, when viewed from the stacking direction of the inner skin material 10 and the heating element 40, the tip 230 (including the detection portion 210) of the temperature sensor 200 is positioned so as not to overlap with the heater wire 41, so that the heat of the heater wire 41 is prevented from being transferred to the tip 230 of the temperature sensor 200. This allows the detection portion 210 of the temperature sensor 200 to detect the temperature of the pipe 100 without being affected by the heat of the heater wire 41.

In this embodiment, the tip 230 of the temperature sensor 200 is arranged along the direction in which the heater wire 41 extends, but this is not limited to this. In other words, the heater wire 41 and the tip 230 of the temperature sensor 200 only need to be arranged so that they do not overlap each other when viewed from the stacking direction of the inner skin material 10 and the heating element 40. For example, if the tip 230 is located between two heater wires 41 arranged side by side in one direction, the heater wire 41 and the tip 230 will not overlap each other. In this case, the position in which the tip 230 is arranged is not limited to the position along the direction in which the heater wire 41 extends, and it may be a position along a direction different from the direction in which the heater wire 41 extends.

In addition, in this embodiment, the temperature sensor 200 is placed at a position exposed to the outer surface of the pipe 100, but this is not limited thereto, and the temperature sensor 200 can be placed at a position where the temperature of the pipe 100 can be detected. For example, the temperature sensor 200 can be placed between the inner skin material 10 and the heating element 40 (support sheet 42). This structure can also be applied to the first embodiment described above and the third embodiment described below.

Third Embodiment
A third embodiment of the present invention will be described below. Here, members having the same functions as those described in the first and second embodiments will be denoted by the same reference numerals and detailed descriptions thereof will be omitted.

This embodiment relates to a structure for fixing the wiring portion 220 of the temperature sensor 200 to the heater device 1, and a structure for suppressing misalignment of the wiring portion 220. The arrangement of the wiring portion 220 will be explained below with reference to FIG. 9. FIG. 9 is a view of the outer cover material 20 unfolded, as viewed from the side of the insulating material 30. FIG. 9 shows a partial area of the outer cover material 20.

As shown in FIG. 9, a portion of the wiring section 220 is located between the outer cover material 20 and the insulating material 30, and is disposed along the inner surface of the outer cover material 20 (the surface that comes into contact with the insulating material 30). The wiring section 220 is fixed to the outer cover material 20 using a fixing means (not shown) such as thread or adhesive. Note that the wiring section 220 can also be fixed to the insulating material 30 instead of the outer cover material 20.

At the first bend position P21 of the wiring portion 220 shown in FIG. 9, the wiring portion 220 bends and extends toward the front side of the paper, and the detection portion 210 is provided at the tip of this wiring portion 220. In other words, the wiring portion 220 extending from the first bend position P21 toward the front side of the paper penetrates the insulation material 30 and extends to the inner surface of the inner skin material 10 (the surface that contacts the pipe 100).

At the second bend position P22 of the wiring portion 220 shown in FIG. 9, the wiring portion 220 bends and extends to the rear of the page, penetrating the outer cover material 20 and extending to the outside of the heater device 1. This allows the wiring portion 220 to be connected to equipment arranged outside the heater device 1. The second bend position P22 is at a different position on the inner surface of the outer cover material 20 from the first bend position P21.

In this embodiment, when the wiring portion 220 is arranged from the first bending position P21 to the second bending position P22, the wiring portion 220 is not arranged along the shortest path that extends in a straight line from the first bending position P21 to the second bending position P22, but is arranged along a detour path that bypasses this shortest path.

Specifically, after arranging the wiring portion 220 from the first bend position P21 in the direction of arrow D4, the wiring portion 220 is bent at the third bend position P23 and arranged in the direction of arrow D5. Then, the wiring portion 220 is bent at the fourth bend position P24 and arranged in the direction of arrow D6, so that the wiring portion 220 reaches the second bend position P22. Here, at the third bend position P23 and the fourth bend position P24, the wiring portion 220 is bent within the plane along the inner surface of the outer skin material 20.

In the detour path of wiring section 220 shown in FIG. 9, the directions of arrows D4 and D6 are parallel to each other, but they do not need to be parallel. Also, the directions of arrows D4 and D5 are perpendicular to each other, and the directions of arrows D5 and D6 are perpendicular to each other, but they do not need to be perpendicular. In other words, it is sufficient that wiring section 220 is arranged on the inner surface of outer skin material 20 along a path (detour path) that deviates from the shortest path described above.

In this embodiment, by arranging the wiring part 220 along the bypass path, it is possible to prevent the wiring part 220 from shifting when a tensile force acts on the wiring part 220 from outside the heater device 1. In other words, when a tensile force acts on the wiring part 220, the wiring part 220 arranged along the bypass path can resist the tensile force and can prevent the wiring part 220 from shifting. Furthermore, it is possible to prevent the position of the detection part 210 from shifting due to the shift of the wiring part 220, and the detection part 210 can detect temperature at the desired position of the piping 100.

In this embodiment, the wiring section 220 arranged along the detour path is arranged on the inner surface of the outer skin material 20 (i.e., between the outer skin material 20 and the insulating material 30), but this is not limited to this. If the detour path of the wiring section 220 is formed in the same plane, it becomes easier to resist the tensile force acting on the wiring section 220, so the wiring section 220 can be arranged along the detour path, for example, at the boundary surface between the insulating material 30 and the heating element 40 or the boundary surface between the inner skin material 10 and the heating element 40. In this case, the wiring section 220 can be fixed to either the insulating material 30 or the heating element 40 (support sheet 42), or to either the inner skin material 10 or the heating element 40 (support sheet 42).

100: Pipe, 1: Heater device, 1A, 1B: Butt joint, 10: Inner cover material, 20: Outer cover material, 30: Insulation material, 40: Heating element, 41: Heater wire, 42: Support sheet, 200: Temperature sensor, 210: Detection unit, 220: Wiring unit

Claims (6)

A heater device disposed along an outer surface of an object to be heated,
A heating element that generates heat when electricity is applied;
A switching device that switches between energization and de-energization of the heating element depending on the temperature of the object to be heated;
and a thermal insulation material disposed between the inner skin material and the outer skin material,
The heater device according to claim 1, wherein the heat insulating material has a housing portion that forms a space for housing the switching device. The heater device according to claim 1, characterized in that the housing portion is a through hole that penetrates the insulating material. The heater device according to claim 1, characterized in that the housing is a recess that opens toward the outer surface of the object to be heated. The heater device according to any one of claims 1 to 3, characterized in that the switching device is a thermostat. A heating unit disposed along an outer surface of an object to be heated,
A heating element that generates heat when electricity is applied;
A switching device that switches between energization and de-energization of the heating element depending on the temperature of the object to be heated;
and a thermal insulation material disposed between the inner skin material and the outer skin material,
The heating section, wherein the heat insulating material has a housing portion that forms a space for housing the switching device. A method for manufacturing a heater device that is disposed along an outer surface of an object to be heated, comprising the steps of:
The heater device is
A heating element that generates heat when electricity is applied;
A switching device that switches between energization and de-energization of the heating element depending on the temperature of the object to be heated;
and a thermal insulation material disposed between the inner skin material and the outer skin material,
A method of manufacturing a heater device, comprising forming a storage section having a predetermined space in the insulating material, and storing the switching device in the storage section.