Heater device

Abstract

To provide a heater device capable of suppressing deterioration in reliability against thermal stress and suppressing complication of a structure.SOLUTION: Heater devices 1, 1a, 1a1, 1b include: a base material 20; a first heater wire 21 that is disposed on one surface 20a of the base material 20 and warms facilities mounted on a moving body; a second heater wire 22 that is disposed on the one surface 20a of the base material 20 and warms a relay switch 43 that switches between presence and absence of power supply to the first heater wire 21; and a control board 31 that is disposed on the one surface 20a of the base material 20 and has the relay switch 43 mounted on a front surface 31a on a side opposite to the base material 20 side.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a heater device that heats equipment mounted on a moving object such as a vehicle. [Background technology]

[0002] Patent document 1 discloses an on-board charger that includes a multilayer substrate having a relay provided on one main surface and a connection pattern connected to the contacts, and a heating resistor provided in a second wiring layer different from the first wiring layer on which the connection pattern is located, in a position that overlaps the connection pattern when viewed from a direction perpendicular to the main surface of the multilayer substrate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6958764 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in conventional on-board chargers, the connection pattern of the relay contacts is formed within a multilayer substrate, and a heating resistor is provided on the surface of the multilayer substrate at the location where the connection pattern is formed, resulting in heating only a portion of the multilayer substrate. In this case, thermal stress is continuously applied to the multilayer substrate, which may reduce the reliability of the quality of the multilayer substrate. Furthermore, when the heating resistor provided in a conventional on-board charger is applied to a vehicle heater device, the heating resistor must be provided separately from the heater device on the multilayer substrate, complicating the structure of the vehicle heater device.

[0005] Therefore, an object of the present disclosure is to provide a heater device that can suppress a decrease in reliability against thermal stress and suppress an increase in structural complexity. [Means for solving the problem]

[0006] A heater device according to one embodiment of the present disclosure includes a substrate, a first heater wire arranged on one surface of the substrate and heating equipment mounted on a mobile body, a second heater wire arranged on the one surface of the substrate and heating a relay switch that switches the supply of power to the first heater wire on and off, and a control board arranged on the one surface of the substrate and on which the relay switch is mounted on the surface opposite the substrate. [Effects of the Invention]

[0007] According to the heater device of the present disclosure, it is possible to suppress a decrease in reliability against thermal stress and to suppress an increase in the complexity of the structure. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing a heater device according to an embodiment. [Figure 2] FIG. 2 is a cross-sectional view of a seat incorporating a heater device taken along line II-II in FIG. [Figure 3] FIG. 3 is a plan view showing the heater device. [Figure 4] FIG. 4 is a cross-sectional view showing the heater device taken along line IV-IV in FIG. [Figure 5A] FIG. 5A is another cross-sectional view showing the heater device. [Figure 5B] FIG. 5B is yet another cross-sectional view showing the heater device. [Figure 6] FIG. 6 is yet another cross-sectional view showing the heater device. [Figure 7] FIG. 7 is a diagram showing a circuit configuration A of the heater device. [Figure 8] FIG. 8 is a diagram showing a circuit configuration B of the heater device. [Figure 9] FIG. 9 is a diagram showing a circuit configuration C of the heater device. [Figure 10] FIG. 10 is a diagram showing a circuit configuration D of the heater device. [Figure 11]FIG. 11 is a diagram showing a circuit configuration E of the heater device. [Figure 12] FIG. 12 is a diagram showing a circuit configuration F of the heater device. DETAILED DESCRIPTION OF THE INVENTION

[0009] The embodiments described below are all comprehensive or specific examples. The numerical values, shapes, materials, components, arrangement positions and connection forms of the components, etc. shown in the following embodiments are merely examples and are not intended to limit the present disclosure. Furthermore, among the components in the following embodiments, components that are not recited in the independent claims are described as optional components.

[0010] In addition, each drawing is a schematic diagram and is not necessarily an exact illustration. In addition, the same components are denoted by the same reference numerals in each drawing.

[0011] Furthermore, in the following embodiments, expressions such as sheet-like are used. For example, sheet-like does not only mean that it is a complete sheet, but also means that it is substantially a sheet, that is, it may include an error of, for example, about several percent. Furthermore, sheet-like means that it is sheet-like within the range in which the effects of the present disclosure can be achieved. The same applies to other expressions using the word "like."

[0012] Hereinafter, the embodiments will be specifically described with reference to the drawings.

[0013] (Embodiment) <Configuration> First, the configuration of the heater device 1 will be described with reference to FIGS.

[0014] Fig. 1 is a perspective view showing a heater device 1 in an embodiment. Fig. 2 is a cross-sectional view of a seat 10 incorporating the heater device 1 taken along line II-II in Fig. 1. Fig. 3 is a plan view showing the heater device 1. Fig. 4 is a cross-sectional view showing the heater device 1 taken along line IV-IV in Fig. 3.

[0015] As shown in FIGS. 1 and 2, the heater device 1 is mounted on a mobile body and can heat equipment of the mobile body. The mobile body is a vehicle, an aircraft, etc. In this embodiment, the heater device 1 mounted on a vehicle will be used for explanation. The equipment is a battery, a seat, a steering wheel, an armrest, etc. mounted on the mobile body. In this embodiment, the heater device 1 is mounted on a seat 10 as an example. In this embodiment, the heater device 1 is arranged between a seat pad and a seat cover in the seat 10.

[0016] As shown in FIGS. 3 and 4, the heater device 1 includes a substrate 20, a first heater wire 21, a second heater wire 22, and a control device 30.

[0017] The substrate 20 is a sheet-shaped nonwoven fabric made of a material having elasticity, flexibility, and ductility, or a foamed resin such as cloth-like urethane. In this embodiment, the substrate 20 is formed in a rectangular shape. However, the shape of the substrate 20 is not limited to a rectangular shape, and may be any other known shape.

[0018] The first heater wire 21 is connected to the control device 30 and is a conductive wire that can generate heat using electric power from the battery 51. The first heater wire 21 can heat equipment mounted on the vehicle.

[0019] The second heater wire 22 is also connected to the control device 30 and is a conductive wire that can generate heat using power from the battery 51. The second heater wire 22 can heat a relay switch 43 that switches on and off the supply of power to the first heater wire 21. The relay switch 43 will be described later.

[0020] The first heater wire 21 is disposed on one surface 20a of the substrate 20. Specifically, the first heater wire 21 is connected to a control device 30 capable of supplying power to the first heater wire 21, and is sewn to the one surface 20a of the substrate 20 with sewing thread so as to form a zigzag pattern. "The first heater wire 21 sewn to the one surface 20a of the substrate 20 with sewing thread" means that the first heater wire 21 is held on the one surface 20a of the substrate 20 by the sewing thread sewn to the substrate 20.

[0021] The second heater wire 22 is also disposed on the one surface 20a of the substrate 20. Specifically, the second heater wire 22 is also connected to a control device 30 capable of supplying power to the second heater wire 22, and is sewn to the one surface 20a of the substrate 20 with sewing thread so as to form a zigzag pattern. "Sewn to the one surface 20a of the substrate 20 with sewing thread" means that the second heater wire 22 is held to the one surface 20a of the substrate 20 by the sewing thread sewn to the substrate 20.

[0022] The first heater wire 21 and the second heater wire 22 are metal wires such as copper wires, and the sewing thread is, for example, a polyester fiber thread.

[0023] The control device 30 is disposed on the side of the first surface 20a of the substrate 20. The control device 30 controls the power supplied to the first heater wire 21 and the second heater wire 22.

[0024] Specifically, the control device 30 includes a control board 31, a heater circuit 40, and a first insulator 41.

[0025] The control board 31 is disposed on the one surface 20a side of the base material 20 so as to cover the second heater wire 22. That is, the second heater wire 22 is disposed between the control board 31 and the base material 20.

[0026] A heater circuit 40 that controls the power supplied to the first heater wire 21 and the second heater wire 22 is mounted on the control board 31. The circuit configuration of the heater circuit 40 will be described in detail later.

[0027] In this embodiment, a relay switch 43 of the heater circuit 40 is mounted on the surface 31a of the control board 31. The relay switch 43 is disposed so as to overlap the second heater wire 22 in the thickness direction of the control board 31 (which can also be said to be the thickness direction of the base material 20).

[0028] A contact pattern 32 for connection to a relay switch 43 is formed on a back surface 31b of the control board 31, which faces the base material 20. The contact pattern 32 is connected to the relay switch 43. In the thickness direction of the control board 31 (the thickness direction of the base material 20), the contact pattern 32 is disposed so as to overlap with the second heater wire 22.

[0029] The first insulator 41 is, for example, a resin material containing a ceramic filler. The first insulator 41 is disposed between the second heater wire 22 and the contact pattern 32. Therefore, the first insulator 41 can block the electrical continuity between the second heater wire 22 and the contact pattern 32.

[0030] The first insulator 41 has thermal conductivity. Therefore, when power is supplied to the second heater wire 22 and the second heater wire 22 generates heat, the thermal energy of the second heater wire 22 is easily conducted to the contact pattern 32 of the control board 31 via the first insulator 41.

[0031] Furthermore, the thermal conductivity of the first insulator 41 is higher than that of the base material 20. Therefore, when the second heater wire 22 generates heat, the thermal energy of the second heater wire 22 is more easily conducted to the first insulator 41 than to the base material 20, and the thermal energy of the second heater wire 22 is conducted to the contact pattern 32 of the control board 31 via the first insulator 41. This allows the contact pattern 32 to be heated. As a result, the heat of the contact pattern 32 is conducted to the conductor of the relay switch 43, reducing the possibility of the relay switch 43 not operating due to freezing.

[0032] Although the configuration of the heater device 1 has been described above, the present embodiment is not limited to the above configuration.

[0033] The configuration of another heater device 1a will be described with reference to FIGS. 5A and 5B.

[0034] Figure 5A is another cross-sectional view showing the heater device 1a, and Figure 5B is yet another cross-sectional view showing the heater device 1a1.

[0035] 5A, in the heater device 1a, the relay switch 43 may be covered with a second insulator 42. The second insulator 42 may be made of the same material as or a different material from the first insulator 41. Any known material may be used for the second insulator 42 as long as it has insulating properties.

[0036] The substrate 20 may have a first portion 121 in which the first heater wire 21 and the second heater wire 22 are arranged, and a second portion 122 that covers the relay switch 43. In this case, the second portion 122 is a tongue-like portion extending from the first portion 121 and can cover the relay switch 43. Specifically, the second portion 122 can cover the structure formed by the second heater wire 22, the first insulator 41, the control board 31, and the relay switch 43 from the side of the structure to above the relay switch 43. The structure is sandwiched or wrapped between the first portion 121 and the second portion 122. This can improve the heat retention of the structure, particularly the heat retention of the relay switch 43 and the contact pattern 32 of the control board 31 connected to the relay switch 43.

[0037] In the present embodiment, the second heater wire 22 is disposed between the second insulator 42 and the first portion 121, but this is not limiting. For example, as shown in FIG. 5B , a second heater wire 22 may be further disposed between the relay switch 43 and the second portion 122. In this case, the second insulator 42 can function as a spacer for blocking conduction between the second heater wire 22 and the relay switch 43. The second heater wire 22 may also be disposed between the first insulator 41 and the first portion 121 or between the second insulator 42 and the second portion 122. This can further improve the heat retention of the structure, particularly the heat retention of the relay switch 43 and the contact pattern 32 of the control board 31 connected to the relay switch 43.

[0038] Although the second portion 122 is shown as being integral with the first portion 121, the present invention is not limited to this. For example, the second portion 122 may be a separate member from the first portion 121.

[0039] The heater device 1a does not necessarily have to include the second insulator 42. In other words, the second insulator 42 is not an essential component of the heater device 1a.

[0040] Furthermore, the configuration of another heater device 1b will be described with reference to FIG.

[0041] FIG. 6 is yet another cross-sectional view showing the heater device 1b.

[0042] 6, a contact pattern 32 for connection with a relay switch 43 may be formed on the surface 31a of the control board 31, and the relay switch 43 may be surface-mounted on the surface 31a of the control board 31. In this case, the first insulator 41 is disposed between the second heater wire 22 and the control board 31. Therefore, when power is supplied from the battery 51 in FIG. 3 to the second heater wire 22 and the second heater wire 22 generates heat, the thermal energy of the second heater wire 22 is conducted to the contact pattern 32 on the surface 31a of the control board 31 via the first insulator 41 and the control board 31.

[0043] In particular, when high power of several hundred watts or more is supplied to the first heater wire 21, a large current may flow through the control board 31. In this case, for example, if the relay switch and contact pattern have poor heat dissipation properties, the temperature of the control board may become high, which could cause an abnormality in the control circuit of the control board. Therefore, in this embodiment, even if high power of several hundred watts or more is supplied to the first heater wire 21 and a large current flows through the control board 31, the contact pattern 32 is in contact with the outside air, so the heat of the control board 31 is easily dissipated to the outside air from the contact pattern 32. This makes it possible to prevent the control board 31 from becoming too hot and causing an abnormality in the control circuit 144.

[0044] <Circuit configuration> Next, a circuit configuration A of the heater circuit 40 provided on the control board 31 will be described with reference to Fig. 7. The following circuit configurations A to F can be applied to all of the heater devices 1 described above.

[0045] FIG. 7 is a diagram showing a circuit configuration A of the heater device 1. As shown in FIG.

[0046] The heater circuit 40 is connected to the vehicle-side circuit 50, the first heater wire 21, and the second heater wire 22. The heater circuit 40 supplies power to the first heater wire 21, and also supplies power to the second heater wire 22 when the vehicle ignition switch 52 is turned on.

[0047] Specifically, the heater circuit 40 has a first switch 141, a second switch 142, a relay switch 43, a control circuit 144, and a switch drive unit 145. The vehicle-side circuit 50 has a battery 51 and an ignition switch 52. The first switch 141 and the second switch 142 are, for example, switching elements such as FETs (Field Effect Transistors).

[0048] The first switch 141, which is connected in series with the second heater wire 22, has one end opposite to the second heater wire 22 side connected to the battery 51, the relay switch 43, and the ignition switch 52. The second heater wire 22 has one end opposite to the first switch 141 side connected to the battery 51, the first heater wire 21, and the control circuit 144.

[0049] One end of the ignition switch 52 is connected to the battery 51 , the first switch 141 and the relay switch 43 , and the other end of the ignition switch 52 is connected to the control circuit 144 and the switch driving unit 145 .

[0050] The relay switch 43, the second switch 142, and the first heater wire 21 are connected in series in this order, and are connected in parallel to the first switch 141 and the second heater wire 22. Specifically, one end of the relay switch 43 is connected to the first switch 141, the ignition switch 52, and the battery 51. The other end of the first heater wire 21 is connected to the second heater wire 22, the control circuit 144, and the battery 51.

[0051] One end of the battery 51 is connected to the ignition switch 52, the relay switch 43, and the first switch 141. The other end of the battery 51 is connected to the control circuit 144, the first heater wire 21, and the second heater wire 22.

[0052] The control circuit 144 is connected to the ignition switch 52, the switch drive unit 145, the relay switch 43, the second switch 142, the first heater wire 21, the second heater wire 22, and the battery 51. The control circuit 144 can control the relay switch 43 and the second switch 142 so that the relay switch 43 and the second switch 142 can be turned ON and OFF.

[0053] When the heater circuit 40 has the circuit configuration A, when the ignition switch 52 is turned on, power is supplied from the vehicle's battery 51 to the switch driver 145 via the ignition switch 52. With the power supplied from the ignition switch 52, the switch driver 145 adjusts the voltage and turns on the first switch 141. When the first switch 141 is turned on, power from the battery 51 is supplied to the second heater wire 22, causing the second heater wire 22 to generate heat. The heat generated by the second heater wire 22 can heat the contact pattern 32 of the control board 31 via the first insulator 41.

[0054] Thereafter, the control circuit 144 is driven by power from the battery 51 when the ignition switch 52 is ON. The control circuit 144 then turns on the relay switch 43 and also turns on the second switch 142. As a result, power from the battery 51 is also supplied to the first heater wire 21, causing the first heater wire 21 to generate heat. The heat generated by the first heater wire 21 can warm the equipment in the vehicle.

[0055] Furthermore, when the ignition switch 52 is turned OFF, power from the battery 51 is no longer supplied to the switch driving unit 145, so the switch driving unit 145 turns OFF the first switch 141. As a result, the supply of power to the second heater wire 22 is stopped.

[0056] Furthermore, when the ignition switch 52 is turned OFF, the control circuit 144 stops the supply of power from the battery 51. Then, the control circuit 144 turns OFF the relay switch 43 and also turns OFF the second switch 142. This stops the supply of power to the first heater wire 21.

[0057] In this circuit configuration A, even if the relay switch 43 cannot be turned on due to freezing or the like, the second heater wire 22 warms the contact pattern 32 of the control board 31, thereby unfreezing the relay switch 43 and making it possible to turn on the relay switch 43, thereby enabling the heater device 1 to be operated.

[0058] Furthermore, with reference to FIG. 8, a circuit configuration B of another heater circuit 40a will be described.

[0059] FIG. 8 is a diagram showing a circuit configuration B of the heater device 1. As shown in FIG.

[0060] The heater circuit 40a is connected to the vehicle-side circuit 50, the first heater wire 21, and the second heater wire 22. The heater circuit 40a supplies power to the first heater wire 21 and the second heater wire 22.

[0061] Specifically, the heater circuit 40a has a first switch 141, a second switch 142, a relay switch 43, a control circuit 144, and a detection circuit 146. The vehicle-side circuit 50 has a battery 51 and an ignition switch 52.

[0062] The first switch 141, which is connected in series with the second heater wire 22, has one end opposite to the second heater wire 22 side connected to the battery 51, the relay switch 43, and the ignition switch 52. The second heater wire 22 has one end opposite to the first switch 141 side connected to the battery 51, the first heater wire 21, and the control circuit 144.

[0063] One end of the ignition switch 52 is connected to the battery 51 , the first switch 141 and the relay switch 43 , and the other end of the ignition switch 52 is connected to the control circuit 144 .

[0064] The relay switch 43, the second switch 142, and the first heater wire 21 are connected in series in this order, and are connected in parallel to the first switch 141 and the second heater wire 22. Specifically, one end of the relay switch 43 is connected to the first switch 141, the ignition switch 52, and the battery 51. The other end of the first heater wire 21 is connected to the second heater wire 22, the control circuit 144, and the battery 51.

[0065] One end of the battery 51 is connected to the ignition switch 52, the relay switch 43, and the first switch 141. The other end of the battery 51 is connected to the control circuit 144, the first heater wire 21, and the second heater wire 22.

[0066] The detection circuit 146 is a voltage detection circuit that detects the ON / OFF state of the relay switch 43 by detecting the output voltage from the relay switch 43. One end of the detection circuit 146 is connected to the relay switch 43 and the second switch 142, and the other end of the detection circuit 146 is connected to the control circuit 144.

[0067] The control circuit 144 is connected to the ignition switch 52, the first switch 141, the relay switch 43, the detection circuit 146, the second switch 142, the first heater wire 21, the second heater wire 22, and the battery 51. The control circuit 144 can control the first switch 141, the relay switch 43, and the second switch 142 so that the first switch 141, the relay switch 43, and the second switch 142 can be turned ON and OFF.

[0068] In the case where the heater circuit 40a has the circuit configuration B, when the ignition switch 52 is turned on, the detection circuit 146 performs voltage detection to determine whether the relay switch 43 is on or off.

[0069] When the ignition switch 52 is ON, the control circuit 144 is driven by power from the battery 51 and controls the relay switch 43 to be ON. When the relay switch 43 is ON and the detection circuit 146 detects that the relay switch 43 is ON, the control circuit 144 does not turn the first switch 141 ON (leaving it OFF) but turns the second switch 142 ON. Then, the control circuit 144 supplies power from the battery 51 to the first heater wire 21. This causes the first heater wire 21 to generate heat. The heat generated by the first heater wire 21 can warm up the equipment in the vehicle.

[0070] On the other hand, when the ignition switch 52 is ON, the control circuit 144 is driven by power from the battery 51 and controls the relay switch 43 to be ON. However, if the relay switch 43 remains OFF due to freezing or the like and the detection circuit 146 detects that the relay switch 43 is OFF, the control circuit 144 turns the first switch 141 ON. The control circuit 144 then supplies power from the battery 51 to the second heater wire 22. When the first switch 141 is ON, power from the battery 51 is supplied to the second heater wire 22, causing the second heater wire 22 to generate heat. The heat generated by the second heater wire 22 can heat the contact pattern 32 of the control board 31 via the first insulator 41.

[0071] Thereafter, the control circuit 144 turns on the relay switch 43 and turns on the second switch 142. When the detection circuit 146 detects that the relay switch 43 is on, the control circuit 144 turns off the first switch 141 and stops the power supplied to the second heater wire 22. As a result, power from the battery 51 is supplied to the first heater wire 21, causing the first heater wire 21 to generate heat. The heat generated by the first heater wire 21 can warm the equipment of the vehicle.

[0072] Furthermore, when the ignition switch 52 is turned OFF, power is no longer supplied from the battery 51 to the control circuit 144, and the control circuit 144 turns OFF the first switch 141. As a result, the supply of power to the second heater wire 22 is stopped.

[0073] Furthermore, when the ignition switch 52 is turned OFF, power is no longer supplied from the battery 51, and the control circuit 144 turns OFF the relay switch 43 and also turns OFF the second switch 142. This stops the supply of power to the first heater wire 21.

[0074] In this circuit configuration B, even if the relay switch 43 cannot be turned on due to freezing or the like, the second heater wire 22 can heat the contact pattern 32 on the control board 31 and turn on the relay switch 43, thereby enabling the heater device 1 to be driven.

[0075] Furthermore, with reference to FIG. 9, a circuit configuration C of yet another heater circuit 40b will be described.

[0076] FIG. 9 is a diagram showing a circuit configuration C of the heater device 1.

[0077] The heater circuit 40b is connected to the vehicle-side circuit 50a, the first heater wire 21, and the second heater wire 22. The heater circuit 40b supplies power to the first heater wire 21 and the second heater wire 22.

[0078] Specifically, the heater circuit 40b has a first switch 141, a second switch 142, a relay switch 43, and a control circuit 144. The vehicle-side circuit 50a has a battery 51.

[0079] The first switch 141, which is connected in series with the second heater wire 22, has one end opposite the second heater wire 22 side connected to the battery 51, the relay switch 43, and the control circuit 144. The second heater wire 22 has one end opposite the first switch 141 side connected to the battery 51, the first heater wire 21, and the control circuit 144.

[0080] The relay switch 43, the second switch 142, and the first heater wire 21 are connected in series in this order, and are connected in parallel to the first switch 141 and the second heater wire 22. Specifically, one end of the relay switch 43 is connected to the first switch 141, the control circuit 144, and the battery 51. The other end of the first heater wire 21 is connected to the second heater wire 22, the control circuit 144, and the battery 51.

[0081] One end of the battery 51 is connected to the control circuit 144, the relay switch 43, and the first switch 141. The other end of the battery 51 is connected to the control circuit 144, the first heater wire 21, and the second heater wire 22.

[0082] The control circuit 144 is connected to the first switch 141, the relay switch 43, the second switch 142, the first heater wire 21, the second heater wire 22, and the battery 51. The control circuit 144 can control the first switch 141, the relay switch 43, and the second switch 142 so that the first switch 141, the relay switch 43, and the second switch 142 can be turned ON and OFF.

[0083] When the heater circuit 40b has circuit configuration C, the control circuit 144 is driven by power from the battery 51, but when the relay switch 43 is turned from ON to OFF, the first switch 141 is turned ON to prevent the relay switch 43 from freezing, causing power from the battery 51 to be supplied to the second heater wire 22. In other words, when the relay switch 43 is turned OFF, power from the battery 51 continues to be supplied to the second heater wire 22 for a predetermined time. Due to the heat generated by the second heater wire 22, the second heater wire 22 can continue to heat the contact pattern 32 of the control board 31 via the first insulator 41 for a predetermined time when the relay switch 43 is OFF.

[0084] Thereafter, when supplying power to the first heater wire 21, the control circuit 144 turns off the first switch 141 to stop the power supplied to the second heater wire 22, turns on the relay switch 43, and also turns on the second switch 142. As a result, power from the battery 51 is supplied to the first heater wire 21, causing the first heater wire 21 to generate heat. The heat generated by the first heater wire 21 can warm the equipment of the vehicle.

[0085] In this circuit configuration C, the second heater wire 22 can be heated when the relay switch 43 is OFF, regardless of whether the ignition switch is ON or OFF, thereby preventing the relay switch 43 from freezing and enabling the heater device 1 to be driven.

[0086] Furthermore, with reference to FIG. 10, a circuit configuration D of yet another heater circuit 40c will be described.

[0087] FIG. 10 is a diagram showing a circuit configuration D of the heater device 1.

[0088] The heater circuit 40c is connected to the vehicle-side circuit 50a, the first heater wire 21, and the second heater wire 22. The heater circuit 40c supplies power to the first heater wire 21 and the second heater wire 22.

[0089] Specifically, the heater circuit 40c has a first switch 141, a second switch 142, a relay switch 43, a control circuit 144, and a temperature detection unit 147. The vehicle-side circuit 50a has a battery 51.

[0090] The first switch 141, which is connected in series with the second heater wire 22, has one end opposite the second heater wire 22 side connected to the battery 51, the relay switch 43, and the control circuit 144. The second heater wire 22 has one end opposite the first switch 141 side connected to the battery 51, the first heater wire 21, and the control circuit 144.

[0091] The relay switch 43, the second switch 142, and the first heater wire 21 are connected in series in this order, and are connected in parallel to the first switch 141 and the second heater wire 22. Specifically, one end of the relay switch 43 is connected to the first switch 141, the control circuit 144, and the battery 51. The other end of the first heater wire 21 is connected to the second heater wire 22, the control circuit 144, and the battery 51.

[0092] One end of the battery 51 is connected to the control circuit 144, the relay switch 43, and the first switch 141. The other end of the battery 51 is connected to the control circuit 144, the first heater wire 21, and the second heater wire 22.

[0093] The temperature detector 147 detects the ambient temperature and outputs the detected ambient temperature to the control circuit 144 .

[0094] The control circuit 144 is connected to the first switch 141, the relay switch 43, the second switch 142, the first heater wire 21, the second heater wire 22, the battery 51, and the temperature detection unit 147. The control circuit 144 can control the first switch 141, the relay switch 43, and the second switch 142 so that the first switch 141, the relay switch 43, and the second switch 142 can be turned ON and OFF.

[0095] When the heater circuit 40c has this circuit configuration D, the control circuit 144 is driven by power from the battery 51, but switches between supplying power from the battery 51 to the second heater wire 22 and not supplying power based on the ambient temperature detected by the temperature detection unit 147.

[0096] For example, if the temperature detection unit 147 detects that the ambient temperature is below a threshold value (e.g., 0°C, at which there is a possibility of freezing), when the control circuit 144 turns the relay switch 43 from ON to OFF, it turns the first switch 141 ON to prevent the relay switch 43 from freezing, and causes power to be supplied from the battery 51 to the second heater wire 22. The heat generated by the second heater wire 22 allows the second heater wire 22 to continue to heat the contact pattern 32 of the control board 31 via the first insulator 41.

[0097] Thereafter, when supplying power to the first heater wire 21, the control circuit 144 turns off the first switch 141 to stop the power supplied to the second heater wire 22, turns on the relay switch 43, and also turns on the second switch 142. As a result, power from the battery 51 is supplied to the first heater wire 21, causing the first heater wire 21 to generate heat. The heat generated by the first heater wire 21 can warm the equipment of the vehicle.

[0098] On the other hand, if the temperature detection unit 147 detects that the ambient temperature is higher than the threshold value, the control circuit 144 turns the relay switch 43 from ON to OFF and leaves the first switch 141 OFF. When power is to be supplied to the first heater wire 21, the control circuit 144 turns the relay switch 43 ON and also turns the second switch 142 ON. As a result, power from the battery 51 is supplied to the first heater wire 21, but power is not supplied to the second heater wire 22. The heat generated by the first heater wire 21 can warm the equipment in the vehicle.

[0099] In this circuit configuration D, the second heater wire 22 can be made to generate heat only when the ambient temperature is low when the relay switch 43 is OFF, regardless of whether the ignition switch is ON or OFF, thereby preventing the relay switch 43 from freezing and enabling the heater device 1 to be driven. Furthermore, because the second heater wire 22 can be made to generate heat when the ambient temperature is low and there is a possibility that the relay switch 43 will freeze, power consumption can be reduced.

[0100] Furthermore, with reference to FIG. 11, a circuit configuration E of yet another heater circuit 40d will be described.

[0101] FIG. 11 is a diagram showing a circuit configuration E of the heater device 1. As shown in FIG.

[0102] The heater circuit 40d is connected to the vehicle-side circuit 50, the first heater wire 21, and the second heater wire 22. The heater circuit 40d supplies power to the first heater wire 21 and the second heater wire 22.

[0103] Specifically, the heater circuit 40d has a first switch 141, a second switch 142, a relay switch 43, a control circuit 144, and a capacitor 148. The vehicle-side circuit 50 has a battery 51 and an ignition switch 52.

[0104] The first switch 141, which is connected in series with the second heater wire 22, has one end opposite to the second heater wire 22 side connected to the battery 51, the relay switch 43, and the ignition switch 52. The second heater wire 22 has one end opposite to the first switch 141 side connected to the battery 51, the capacitor 148, the first heater wire 21, and the control circuit 144.

[0105] One end of the ignition switch 52 is connected to the battery 51 , the first switch 141 and the relay switch 43 , and the other end of the ignition switch 52 is connected to the control circuit 144 and the capacitor 148 .

[0106] The relay switch 43, the second switch 142, and the first heater wire 21 are connected in series in this order, and are connected in parallel to the first switch 141 and the second heater wire 22. Specifically, one end of the relay switch 43 is connected to the first switch 141, the ignition switch 52, and the battery 51. The other end of the first heater wire 21 is connected to the second heater wire 22, the capacitor 148, the control circuit 144, and the battery 51.

[0107] One end of the battery 51 is connected to the ignition switch 52, the relay switch 43, and the first switch 141. The other end of the battery 51 is connected to the capacitor 148, the control circuit 144, the first heater wire 21, and the second heater wire 22.

[0108] The capacitor 148 is connected in parallel to the battery 51. The capacitor 148 stores power from the battery 51 when the ignition switch 52 is ON, and can discharge the stored power from the battery 51 when the ignition switch 52 is OFF.

[0109] The control circuit 144 is connected to the ignition switch 52, the capacitor 148, the first switch 141, the relay switch 43, the second switch 142, the first heater wire 21, the second heater wire 22, and the battery 51. The control circuit 144 can control the first switch 141, the relay switch 43, and the second switch 142 so that the first switch 141, the relay switch 43, and the second switch 142 can be turned ON and OFF.

[0110] When heater circuit 40d has circuit configuration E, when ignition switch 52 is turned on, power from battery 51 is supplied to capacitor 148 and stored in capacitor 148. When ignition switch 52 is turned on, control circuit 144 is driven by power from battery 51. Control circuit 144 turns on relay switch 43 and also turns on second switch 142.

[0111] When the ignition switch 52 is turned OFF, the control circuit 144, which is driven by the power stored in the capacitor 148, receives an OFF signal for the ignition switch 52 from a host ECU mounted on the vehicle. In this case, the control circuit 144 uses the power of the capacitor 148 to turn OFF the relay switch 43, turn OFF the second switch 142, and turn ON the first switch 141, thereby supplying power from the battery 51 to the second heater wire 22. In other words, when the relay switch 43 is turned OFF from ON, the control circuit 144 turns ON the first switch 141 to prevent the relay switch 43 from freezing. While the capacitor 148 is driving the control circuit 144, power from the battery 51 continues to be supplied to the second heater wire 22. The capacitance of the capacitor 148 is such that power can be continuously supplied to the control circuit 144 for a period of time sufficient to prevent the relay switch 43 from freezing due to heat generation by the second heater wire 22. An electric double-layer capacitor, for example, can be used as the capacitor 148.

[0112] The power supplied to the control circuit 144 turns on the first switch 141, causing the second heater wire 22 to generate heat, so that the second heater wire 22 can continue to heat the contact pattern 32 of the control board 31 through the first insulator 41 even when the relay switch 43 is OFF.

[0113] Thereafter, the ignition switch 52 is turned ON, and the control circuit 144 supplies power to the first heater wire 21. In this case, the control circuit 144 turns OFF the first switch 141 to stop the power supplied to the second heater wire 22, turns ON the relay switch 43, and also turns ON the second switch 142. As a result, power from the battery 51 is supplied to the first heater wire 21, causing the first heater wire 21 to generate heat. The heat generated by the first heater wire 21 can warm the equipment in the vehicle.

[0114] In this circuit configuration E, even if the ignition switch 52 is turned OFF and the relay switch 43 is turned OFF, the control circuit 144 can be driven by the power of the capacitor 148 to generate heat in the second heater wire 22, thereby preventing the relay switch 43 from freezing and enabling the heater device 1 to be driven.

[0115] Furthermore, with reference to FIG. 12, a circuit configuration F of yet another heater circuit 40e will be described.

[0116] FIG. 12 is a diagram showing a circuit configuration F of the heater device 1.

[0117] The heater circuit 40e is connected to the vehicle-side circuit 50, the first heater wire 21, and the second heater wire 22. The heater circuit 40e supplies power to the first heater wire 21 and the second heater wire 22.

[0118] Specifically, the heater circuit 40e includes a first switch 141, a second switch 142, a relay switch 43, a control circuit 144, a temperature detection unit 147, and a capacitor 148. The vehicle-side circuit 50 includes a battery 51 and an ignition switch 52.

[0119] The first switch 141, which is connected in series with the second heater wire 22, has one end opposite to the second heater wire 22 side connected to the battery 51, the relay switch 43, and the ignition switch 52. The second heater wire 22 has one end opposite to the first switch 141 side connected to the battery 51, the capacitor 148, the first heater wire 21, and the control circuit 144.

[0120] One end of the ignition switch 52 is connected to the battery 51 , the first switch 141 and the relay switch 43 , and the other end of the ignition switch 52 is connected to the control circuit 144 and the capacitor 148 .

[0121] The relay switch 43, the second switch 142, and the first heater wire 21 are connected in series in this order, and are connected in parallel to the first switch 141 and the second heater wire 22. Specifically, one end of the relay switch 43 is connected to the first switch 141, the ignition switch 52, and the battery 51. The other end of the first heater wire 21 is connected to the second heater wire 22, the capacitor 148, the control circuit 144, and the battery 51.

[0122] One end of the battery 51 is connected to the ignition switch 52, the relay switch 43, and the first switch 141. The other end of the battery 51 is connected to the capacitor 148, the control circuit 144, the first heater wire 21, and the second heater wire 22.

[0123] The capacitor 148 is connected in parallel to the battery 51. The capacitor 148 stores power from the battery 51 when the ignition switch 52 is ON, and can discharge the stored power from the battery 51 when the ignition switch 52 is OFF.

[0124] The temperature detector 147 detects the ambient temperature and outputs the detected ambient temperature to the control circuit 144 .

[0125] The control circuit 144 is connected to the ignition switch 52, the capacitor 148, the first switch 141, the relay switch 43, the second switch 142, the first heater wire 21, the second heater wire 22, the battery 51, and the temperature detection unit 147. The control circuit 144 can control the first switch 141, the relay switch 43, and the second switch 142 so that the first switch 141, the relay switch 43, and the second switch 142 can be turned ON and OFF.

[0126] When heater circuit 40e has circuit configuration F, when ignition switch 52 is turned ON, power from battery 51 is supplied to capacitor 148 and the power from battery 51 is stored in capacitor 148. Furthermore, control circuit 144 is driven by power from battery 51 when ignition switch 52 is ON, and switches between supplying and not supplying power from battery 51 to second heater wire 22 based on the ambient temperature detected by temperature detection unit 147.

[0127] For example, if the temperature detection unit 147 detects that the ambient temperature is below a threshold value (e.g., 0°C, at which there is a possibility of freezing), when the control circuit 144 turns the relay switch 43 from ON to OFF, it turns the first switch 141 ON to prevent the relay switch 43 from freezing, and causes power to be supplied from the battery 51 to the second heater wire 22. The heat generated by the second heater wire 22 allows the second heater wire 22 to continue to heat the contact pattern 32 of the control board 31 via the first insulator 41.

[0128] Thereafter, when supplying power to the first heater wire 21, the control circuit 144 turns off the first switch 141 to stop the power supplied to the second heater wire 22, turns on the relay switch 43, and also turns on the second switch 142. As a result, power from the battery 51 is supplied to the first heater wire 21, causing the first heater wire 21 to generate heat. The heat generated by the first heater wire 21 can warm the equipment of the vehicle.

[0129] On the other hand, if the temperature detection unit 147 detects that the ambient temperature is higher than the threshold value, the control circuit 144 turns the relay switch 43 from ON to OFF and keeps the first switch 141 OFF. When supplying power to the first heater wire 21, the control circuit 144 turns the relay switch 43 ON and also turns the second switch 142 ON. As a result, power from the battery 51 is supplied to the first heater wire 21, but power is not supplied to the second heater wire 22. The heat generated by the first heater wire 21 can warm the equipment in the vehicle.

[0130] Furthermore, when the ignition switch 52 is turned off, the control circuit 144, which is driven by the power stored in the capacitor 148, receives an OFF signal for the ignition switch 52 from a higher-level ECU mounted on the vehicle.

[0131] At this time, if the temperature detection unit 147 detects that the ambient temperature is equal to or lower than the threshold value, the control circuit 144 turns on the first switch 141 to prevent the relay switch 43 from freezing, and supplies power from the battery 51 to the second heater wire 22. The heat generated by the second heater wire 22 can heat the contact pattern 32 of the control board 31 via the first insulator 41.

[0132] On the other hand, if the temperature detector 147 detects that the ambient temperature is higher than the threshold value, the control circuit 144 turns off the first switch 141 to stop the power supply to the second heater wire 22.

[0133] In this circuit configuration F, even when the ignition switch 52 is turned OFF and the relay switch 43 is turned OFF, the control circuit 144 is driven by the power from the capacitor 148, and the second heater wire 22 is made to generate heat only when the ambient temperature is low, thereby preventing the relay switch 43 from freezing and enabling the heater device 1 to be driven.

[0134] <Action and effect> Next, the effects of the heater devices 1, 1a, 1a1, and 1b in the above-described embodiments will be described.

[0135] The heater devices 1, 1a, 1a1, and 1b of technology 1 in this embodiment include a substrate 20, a first heater wire 21 arranged on one surface 20a of the substrate 20 and heating equipment mounted on a mobile body, a second heater wire 22 arranged on one surface 20a of the substrate 20 and heating a relay switch 43 that switches on and off the supply of power to the first heater wire 21, and a control board 31 arranged on one surface 20a of the substrate 20 and on which the relay switch 43 is mounted on a surface 31a opposite the substrate 20 side.

[0136] Compared to conventional configurations in which only a portion of a multilayer board is heated, in this embodiment, the second heater wire 22 can heat the relay switch 43, thereby suppressing a decrease in reliability of the quality of the control board 31.

[0137] Furthermore, since the first heater wire 21 and the second heater wire 22 are arranged on one surface 20a of the base material 20, the first heater wire 21 and the second heater wire 22 can be gathered together on the base material 20. This makes it possible to prevent the structure of the heater devices 1, 1a, 1a1, and 1b from becoming complicated.

[0138] Therefore, according to the present disclosure, it is possible to suppress a decrease in reliability against thermal stress and to suppress an increase in the complexity of the structure.

[0139] In particular, when the second heater wire 22 generates heat, the relay switch 43 can be warmed via the control board 31. Therefore, even in cold places, the relay switch 43 can be prevented from freezing, and the heater devices 1, 1a, 1a1, and 1b can be driven.

[0140] In the heater devices 1, 1a, 1a1, and 1b of the second technique of this embodiment, the relay switch 43 is the heater device 1, 1a, 1a1, and 1b of the first technique, which is arranged so as to overlap with the second heater wire 22.

[0141] This allows the heat of the second heater wire 22 to be easily conducted to the relay switch 43, making it easier for the second heater wire 22 to warm the relay switch 43. This makes it possible to prevent the relay switch 43 from freezing, and to drive the heater devices 1, 1a, 1a1, and 1b.

[0142] In the heater devices 1, 1a, 1a1, and 1b of the third technique in this embodiment, the second heater wire 22 is the heater device 1, 1a, 1a1, and 1b according to the second technique, which is disposed between the control board 31 and the base material 20.

[0143] According to this, when the second heater wire 22 generates heat, the heat warms the control board 31 and also the relay switch 43 mounted on the control board 31. This makes it possible to prevent the relay switch 43 from freezing, and to drive the heater devices 1, 1a, 1a1, and 1b.

[0144] Furthermore, in the heater devices 1, 1a, 1a1, and 1b of technology 4 in this embodiment, the heater devices 1, 1a, 1a1, and 1b are those described in any one of technologies 1 to 3, in which a contact pattern 32 for connecting to a relay switch 43 is formed on the back surface 31b of the control board 31 on the base material 20 side.

[0145] According to this, when the second heater wire 22 generates heat, the heat can warm the contact pattern 32. Therefore, the heat of the contact pattern 32 is transmitted to the relay switch 43, which can prevent freezing and condensation in the relay switch 43 and enable the heater devices 1, 1a, 1a1, and 1b to be driven.

[0146] In addition, in the heater devices 1, 1a, 1a1, and 1b of Technique 5 according to the present embodiment, the contact pattern 32 is arranged so as to overlap the second heater wire 22, as in the heater devices 1, 1a, 1a1, and 1b according to Technique 4.

[0147] According to this, the heat of the second heater wire 22 is directly conducted to the contact pattern 32 above, so that the contact pattern 32 is more likely to heat up.

[0148] Furthermore, the heater devices 1, 1a, 1a1, and 1b of Technology 6 in this embodiment are the heater devices 1, 1a, 1a1, and 1b described in Technology 4 or 5, which have thermal conductivity and are provided with a first insulator 41 arranged between the second heater wire 22 and the contact pattern 32.

[0149] According to this, the second heater wire 22 generates heat, thereby warming the first insulator 41. The heated first insulator 41 can warm the control board 31 including the contact pattern 32 and the relay switch 43.

[0150] In addition, the heater devices 1, 1a, 1a1, and 1b of the seventh technique according to the present embodiment are heater devices 1, 1a, 1a1, and 1b according to the sixth technique, in which the thermal conductivity of the first insulator 41 is greater than the thermal conductivity of the substrate 20.

[0151] According to this, when the second heater wire 22 generates heat, the heat is easily conducted to the control board 31 via the first insulator 41. Therefore, the entire control board 31, including the contact pattern 32 and the relay switch 43, is easily heated.

[0152] Furthermore, in the heater device 1a, 1a1 of Technology 8 in this embodiment, the substrate 20 is the heater device 1a, 1a1 described in any one of Technologies 1 to 7, which has a first portion 121 in which the first heater wire 21 and the second heater wire 22 are arranged, and a second portion 122 that covers the relay switch 43.

[0153] This allows the relay switch 43 to be wrapped in the first portion 121 and the second portion 122 of the base material 20, thereby improving the heat retention of the relay switch 43 when the second heater wire 22 generates heat.

[0154] Furthermore, the heater device 1a1 of the ninth technique of this embodiment is the heater device 1a1 of the eighth technique, in which the second heater wire 22 is further disposed between the second portion 122 and the relay switch 43.

[0155] According to this, when the second heater wire 22 generates heat, the heat is more likely to be conducted to the relay switch 43.

[0156] Furthermore, the heater device 1a1 of Technology 10 in this embodiment is the heater device 1a1 described in Technology 9, which is provided with a second insulator 42 covering the relay switch 43, and the second heater wire 22 is arranged between the second insulator 42 and the second portion 122.

[0157] According to this, the second heater wire 22 generates heat, thereby warming the second insulator 42. The heated second insulator 42 warms the relay switch 43, so that the heat retention of the relay switch 43 can be improved.

[0158] Furthermore, when the second insulator 42 is disposed between the second heater wire 22 and the relay switch 43, conduction between the relay switch 43 and the second heater wire 22 can be suppressed.

[0159] Furthermore, in the heater device 1b of technique 11 in this embodiment, the heater device 1b is the heater device 1b described in any one of techniques 1 to 10, in which a contact pattern 32 for connecting to a relay switch 43 is formed on the surface 31a of the control board 31.

[0160] With this, the second heater wire 22 generates heat, which warms the contact pattern 32, but since the contact pattern 32 is exposed to the outside air, the heat can be dissipated from the contact pattern 32. This makes it possible to prevent the contact pattern 32 from becoming too hot. This makes it possible to prevent abnormal operation of the heater circuits 40, 40a, 40b, 40c, 40d, and 40e arranged on the control board 31.

[0161] Furthermore, the heater device 1b of technique 12 in this embodiment is the heater device 1b described in technique 11, which has thermal conductivity and includes a first insulator 41 arranged between the second heater wire 22 and the control board 31.

[0162] With this, even if high power of several hundred watts or more is supplied to the first heater wire 21 and a large current flows through the control board 31, the contact pattern 32 is in contact with the outside air, so the heat of the control board 31 is easily dissipated to the outside air from the contact pattern 32. This prevents the control board 31 from becoming too hot, and prevents abnormalities from occurring in the control circuit 144.

[0163] Furthermore, the second heater wire 22 generates heat, thereby warming the first insulator 41. The heated first insulator 41 can warm the control board 31 and then the contact pattern 32 and the relay switch 43.

[0164] Furthermore, in the heater devices 1, 1a, 1a1, and 1b of technology 13 in this embodiment, the control board 31 is the heater device 1, 1a, 1a1, and 1b described in any one of technologies 1 to 12, which has a switch drive unit 145 that can supply power to the second heater wire 22 when the ignition switch 52 of the mobile body is turned ON, and a control circuit 144 that controls the supply of power from the battery 51 of the mobile body to the first heater wire 21 when the ignition switch 52 of the mobile body is turned ON.

[0165] According to this, when the ignition switch 52 is turned on, the switch driving unit 145 supplies power to the second heater wire 22, which generates heat and continues to heat the relay switch 43. This makes it possible to prevent the relay switch 43 from freezing, and to drive the heater devices 1, 1a, 1a1, and 1b.

[0166] Furthermore, in the heater devices 1, 1a, 1a1, and 1b of technique 14 of this embodiment, the control board 31 has a detection circuit 146 that detects whether the relay switch 43 is ON or OFF, and a control circuit 144 that is driven based on the detection of the detection circuit 146, and when the relay switch 43 is controlled to be ON, the control circuit 144 controls the supply of power to the second heater wire 22 when the detection circuit 146 detects that the relay switch 43 is OFF, and when the relay switch 43 is controlled to be ON, the control circuit 144 controls the supply of power to the second heater wire 22 to be stopped when the detection circuit 146 detects that the relay switch 43 is ON, in the heater devices 1, 1a, 1a1, and 1b according to any one of techniques 1 to 12.

[0167] According to this, when the control circuit 144 controls the relay switch 43 to be ON, the detection circuit 146 can detect that the relay switch 43 is not ON. In this case, the control circuit 144 can supply power to the second heater wire 22. The heat generated by the second heater wire 22 can prevent the relay switch 43 from freezing, and the heater devices 1, 1a, 1a1, and 1b can be driven.

[0168] Furthermore, in the heater device 1, 1a, 1a1, 1b of technology 15 in this embodiment, the control board 31 is the heater device 1, 1a, 1a1, 1b described in any one of technologies 1 to 12, which has a control circuit 144 that controls the supply of power from the battery 51 of the mobile body to the second heater wire 22 when the relay switch 43 is OFF.

[0169] According to this, when the relay switch 43 is OFF, the control circuit 144 can supply power to the second heater wire 22. Heat generated by the second heater wire 22 can prevent the relay switch 43 from freezing, and the heater devices 1, 1a, 1a1, and 1b can be driven.

[0170] Furthermore, in the heater device 1, 1a, 1a1, 1b of technology 16 in this embodiment, the control board 31 is the heater device 1, 1a, 1a1, 1b described in any one of technologies 1 to 12, which has a temperature detection unit 147 that detects the ambient temperature, and a control circuit 144 that controls the supply of power from the battery 51 of the mobile body to the second heater wire 22 to be switched on or off based on the ambient temperature detected by the temperature detection unit 147 when the relay switch 43 is OFF.

[0171] This allows the control circuit 144 to supply power to the second heater wire 22 based on the ambient temperature detected by the temperature detection unit 147. Heat generated by the second heater wire 22 can prevent the relay switch 43 from freezing, and allows the heater devices 1, 1a, 1a1, and 1b to be driven.

[0172] Furthermore, in the heater device 1, 1a, 1a1, 1b of technology 17 in this embodiment, the control board 31 is the heater device 1, 1a, 1a1, 1b described in any one of technologies 1 to 12, which has a capacitor 148 that stores power from the battery 51 of the mobile body, and a control circuit 144 that is driven by the power of the capacitor 148 and controls the power from the battery 51 of the mobile body to be supplied to the second heater wire 22 when the ignition switch 52 of the mobile body is OFF.

[0173] With this, even when the ignition switch 52 is OFF, the control circuit 144, which is driven by the power of the capacitor 148, can supply power to the second heater wire 22. The heat generated by the second heater wire 22 can prevent the relay switch 43 from freezing, and the heater devices 1, 1a, 1a1, and 1b can be driven.

[0174] Furthermore, in the heater device 1, 1a, 1a1, 1b of technology 18 in this embodiment, the control board 31 is the heater device 1, 1a, 1a, 1b described in any one of technologies 1 to 12, which has a capacitor 148 that stores power from the battery 51 of the mobile body, a temperature detection unit 147 that detects the ambient temperature, and a control circuit 144 that is driven by power from the capacitor 148 when the ignition switch 52 of the mobile body is OFF, and controls to switch on or off the supply of power from the battery of the mobile body to the second heater wire 22 based on the ambient temperature detected by the temperature detection unit 147.

[0175] According to this, even when the ignition switch 52 is OFF, the control circuit 144, which is driven by the power of the capacitor 148, can supply power to the second heater wire 22 based on the ambient temperature detected by the temperature detection unit 147. The heat generated by the second heater wire 22 can prevent the relay switch 43 from freezing, and the heater devices 1, 1a, 1a1, and 1b can be driven.

[0176] (others) While the heater device according to the present disclosure has been described above based on the above-mentioned embodiments, the present disclosure is not limited to these embodiments. As long as the modifications do not deviate from the spirit of the present disclosure, various modifications conceivable by those skilled in the art may also be included within the scope of the present disclosure.

[0177] For example, in the heater device, all or some of the components such as the control circuit may be configured with dedicated hardware, or may be realized by executing a software program suitable for each component. Each component may be realized by a program execution unit such as a CPU (Central Processing Unit) or a processor reading and executing a software program recorded on a recording medium such as an HDD (Hard Disk Drive) or semiconductor memory.

[0178] In addition, this disclosure also includes forms obtained by making various modifications to the above embodiments that a person skilled in the art would think of, and forms realized by arbitrarily combining the components and functions of the embodiments within the scope that does not deviate from the intent of this disclosure. [Industrial Applicability]

[0179] The heater device according to the present disclosure is applicable to a moving body and equipment mounted on the moving body. [Explanation of symbols]

[0180] 1, 1a, 1a1, 1b Heater device 20 Base material 21 First heater wire 22 Second heater wire 31 Control board 31a surface 31b back side 32 Contact Pattern 41 First insulator 42 Second Insulator 43 Relay Switch 51 Battery 52 Ignition switch 121 Part 1 122 Part 2 144 Control circuit 145 Switch drive unit 146 Detection circuit 147 Temperature detection unit

Claims

1. A substrate; a first heater wire disposed on one surface of the base material and configured to heat equipment mounted on the moving body; a second heater wire disposed on the one surface of the base material and configured to heat a relay switch that switches between supplying and not supplying power to the first heater wire; a control board that is disposed on the one surface of the base material and has the relay switch mounted on a surface opposite to the base material side; Heating device.

2. The relay switch is disposed so as to overlap the second heater wire. The heater device according to claim 1 .

3. The second heater wire is disposed between the control board and the base material. The heater device according to claim 2 .

4. A contact pattern for connecting to the relay switch is formed on the back surface of the control board on the side of the base material. The heater device according to any one of claims 1 to 3.

5. The contact pattern is disposed so as to overlap the second heater wire. The heater device according to claim 4 .

6. a first insulator having thermal conductivity and disposed between the second heater wire and the contact pattern; The heater device according to claim 4 .

7. The thermal conductivity of the first insulator is greater than the thermal conductivity of the base material. The heater device according to claim 6 .

8. The substrate has a first portion in which the first heater wire and the second heater wire are disposed and a second portion that covers the relay switch. The heater device according to any one of claims 1 to 3.

9. The second heater wire is further disposed between the second portion and the relay switch. The heater device according to claim 8 .

10. a second insulator covering the relay switch; The second heater wire is disposed between the second insulator and the second portion. The heater device according to claim 9.

11. A contact pattern for connecting with the relay switch is formed on the surface of the control board. The heater device according to any one of claims 1 to 3.

12. a first insulator having thermal conductivity and disposed between the second heater wire and the control board; The heater device according to claim 11 .

13. The control board a switch driving unit that can supply power to the second heater wire when an ignition switch of the moving body is turned on; a control circuit that controls the supply of power from a battery of the mobile body to the first heater wire when an ignition switch of the mobile body is turned on; The heater device according to any one of claims 1 to 3.

14. The control board a detection circuit for detecting whether the relay switch is ON or OFF; a control circuit that is driven based on the detection of the detection circuit, The control circuit When the relay switch is controlled to be turned on, if the detection circuit detects that the relay switch is turned off, power is supplied to the second heater wire; When the relay switch is controlled to be turned on, and the detection circuit detects that the relay switch is turned on, control is performed to stop the power supplied to the second heater wire. The heater device according to any one of claims 1 to 3.

15. The control board has a control circuit that controls the supply of power from a battery of the mobile body to the second heater wire when the relay switch is OFF. The heater device according to any one of claims 1 to 3.

16. The control board a temperature detection unit that detects the ambient temperature; a control circuit that controls, when the relay switch is OFF, to switch on and off the supply of power from the battery of the mobile body to the second heater wire based on the ambient temperature detected by the temperature detection unit. The heater device according to any one of claims 1 to 3.

17. The control board a capacitor for storing power from a battery of the mobile body; a control circuit that controls the second heater wire to be driven by the power of the capacitor when an ignition switch of the mobile body is turned off, and supplies power from a battery of the mobile body to the second heater wire. The heater device according to any one of claims 1 to 3.

18. The control board a capacitor for storing power from a battery of the mobile body; a temperature detection unit that detects the ambient temperature; a control circuit that is driven by the power of the capacitor when an ignition switch of the mobile body is turned off and controls to switch on or off the supply of power from the battery of the mobile body to the second heater wire based on the ambient temperature detected by the temperature detection unit. The heater device according to any one of claims 1 to 3.

Images