WO2022202228A1

WO2022202228A1 - Heater device

Info

Publication number: WO2022202228A1
Application number: PCT/JP2022/009442
Authority: WO
Inventors: 祐哉鈴木; 祐介田中; 卓也井頭
Original assignee: 株式会社デンソー
Priority date: 2021-03-26
Filing date: 2022-03-04
Publication date: 2022-09-29
Also published as: JP2022150763A

Abstract

Heating wires (20) are provided to a prescribed layer of an insulating base material (10), and generate heat when energized. A heat uniformizing part (30) is also provided to a prescribed layer of the insulating base material (10), and uniformizes the heat generated by the heating wires (20) in the surface direction of the insulating base material (10). Among the heating wires (20), those extending side by side are referred to as first and second heating wires (21, 22). In addition, the distance between the center of the first heating wire (21) and the center of the second heating wire (22), the width of the first heating wire (21), and the width of the second heating wire (22), are respectively denoted by Ph, Wh1, and Wh2. In that case, a heater device (1) exhibits relationships of Ph/Wh1≤15 and Ph/Wh2≤15.

Description

heater device

Cross-references to related applications

This application is based on Japanese Patent Application No. 2021-53510 filed on March 26, 2021, the contents of which are incorporated herein by reference.

The present disclosure relates to a heater device that radiates radiant heat to warm an object.

2. Description of the Related Art Conventionally, a heater device is known which is mounted on a vehicle and warms a passenger by radiating radiant heat to the passenger.
In the heater device described in Patent Document 1, a heating wire that generates heat when energized and a detection wire (specifically, a transmitting electrode and a receiving electrode) for detecting contact or proximity of an object are combined on one insulating base material. It is arranged in layers. When the detection line detects that an object such as a passenger's finger is in contact with or comes close to the heater, the heater device stops or reduces the amount of power supplied to the heating wire, thereby suppressing the temperature rise of the object. It prevents the occupants from experiencing heat damage such as thermal discomfort. In addition, in this heater device, a plurality of wide parts are arranged in the detection wire, and the detection wire has a function as a soaking part that diffuses the heat generated by the heating wire in the surface direction, thereby improving the in-plane temperature distribution. doing well.

JP 2019-184171 A

However, Patent Document 1 does not define the relationship between the distance between adjacent heating lines (hereinafter referred to as "pitch of heating lines") and the width of the heating lines. That is, in Patent Document 1, the dimensional relationship that should be suppressed in order to improve the amount of radiant heat released (hereinafter referred to as "heat generation performance") when a predetermined voltage is applied to the heating wire of the heater device is not clarified. .

An object of the present disclosure is to improve the amount of heat generated and prevent heat damage in a heater device in which a heating wire and a soaking section are arranged in a predetermined layer of an insulating base material.

According to one aspect of the present disclosure, a heater device includes an insulating base material, a heating wire, and a soaking section. The heating wire is provided in a predetermined layer of the insulating base material and generates heat when energized. The heat soaking section is also provided in a predetermined layer of the insulating base material, and soaks the heat generated by the heating wire in the planar direction of the insulating base material. Here, among the heating wires, those extending side by side are called the first heating wire and the second heating wire. Also, the distance between the center of the first heating wire and the center of the second heating wire is Ph, the width of the first heating wire is Wh1, and the width of the second heating wire is Wh2. At this time, the heater device has a relationship of Ph/Wh1≦15 and Ph/Wh2≦15.

According to this, the inventors analyzed the relationship between the pitch of the heating wire and the width of the heating wire while continuing to earnestly study the improvement of the heat generation performance of the heater device and the prevention of heat damage. By doing so, it was found that the rate of increase in the amount of heat generated per unit area can be increased. Based on the results of this analysis, the heater device achieves improved heat generation performance and prevention of heat damage by setting the relationship between the pitch of the heating wire and the width of the heating wire to Ph/Wh1 ≤ 15 and Ph/Wh2 ≤ 15. can do.

It should be noted that the reference numerals in parentheses attached to each component etc. indicate an example of the correspondence relationship between the component etc. and the specific component etc. described in the embodiment described later.

It is a figure which shows a mode that the heater apparatus which concerns on 1st Embodiment was mounted in the vehicle. It is an outline view of a heater device concerning a 1st embodiment. It is a sectional view showing a part of heater device concerning a 1st embodiment. It is a top view showing a part of heater device concerning a 1st embodiment. 4 is a graph showing the "calorific value per unit area" versus "heating wire pitch/heating wire width" for various widths of the heating wire. 4 is a graph showing the "calorific value per unit area" versus the "pitch of the heating lines" when the width of the heating lines is 0.3 mm. 4 is a graph showing "in-plane average temperature/heating wire temperature" with respect to "heating wire pitch/heating wire width". It is a top view showing a part of heater device concerning a 2nd embodiment. It is a top view showing a part of heater device concerning a 3rd embodiment. It is a top view showing a part of heater device concerning a 4th embodiment. It is a top view which shows a part of heater apparatus which concerns on 5th Embodiment.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In addition, in each of the following embodiments, the same or equivalent portions are denoted by the same reference numerals, and description thereof will be omitted.

(First embodiment)
A heater device 1 according to the first embodiment will be described. As shown in FIG. 1, the heater device 1 is installed inside a moving body such as a vehicle. The heater device 1 constitutes a part of the heating device in the passenger compartment. The heater device 1 is an electric heater that generates heat by being supplied with power from a power supply device such as a battery or a generator mounted on a mobile body. The heater device 1 is a planar heater formed in a flexible thin plate shape.

The heater device 1 can be used, for example, as a device for immediately providing warmth to the occupant 3 immediately after starting the engine for running the vehicle. The heater device 1 is installed so as to radiate radiant heat H to the feet of an occupant 3 sitting on a seat 4 in the vehicle compartment. For example, the heater device 1 is installed on the lower surface of a steering column cover 7 provided to cover a steering column 6 for supporting the steering 5, or on a dashboard 8 located below the steering column cover 7. . Since the heater device 1 has flexibility, it is installed along each mounting surface.

FIG. 2 is a plan view of the heater device 1. FIG. In this state, the heater device 1 extends along the XY plane defined by the X and Y axes. Moreover, the heater device 1 is formed in a thin plate shape having a thickness in the Z-axis direction. The heater device 1 has a heating surface 2 that generates heat when power is supplied. The heater device 1 is used to radiate radiant heat H from the heat generating surface 2 in the direction of the axis Z to heat an object positioned in that direction.

3 and 4 show only a part of the heater device 1. FIG. As shown in FIGS. 3 and 4, the heater device 1 includes an insulating base material 10, a heating wire 20, a soaking section 30 (specifically, a first soaking wire 31, a second soaking wire 32, a third soaking wire). 33), an insulating layer 40, a skin material 50, and the like.

The insulating base material 10 and the insulating layer 40 are made of a resin material (for example, polyimide film) that has excellent electrical insulation and is resistant to high temperatures. A heating wire 20 and a soaking section 30 are provided on the surface of the insulating base material 10 that is arranged on the side opposite to the occupant 3 . That is, the heating wire 20 and the soaking section 30 are provided in a predetermined layer (that is, the same layer) of the insulating base material 10 . An insulating layer 40 covers the surface of the insulating base material 10 opposite to the occupant 3 , the heating wire 20 and the soaking section 30 . On the other hand, a skin material 50 is provided on the surface of the insulating base material 10 that is arranged on the occupant 3 side.

Note that FIG. 4 is a view of the insulating base material 10 seen through the insulating layer 40 from the side opposite to the occupant 3 . In addition, in FIG. 4, the heating wire 20 and the heat soaking portion 30 are hatched to distinguish them from the insulating base material 10 and make them easier to see, although they are not cross sections. This also applies to FIGS. 8 to 11, which will be referred to in each embodiment described later.

The heating wire 20 is made of a metal material that generates heat when energized. Specifically, the heating wire 20 can be configured using metals such as copper, an alloy of copper and tin (Cu—Sn), silver, tin, stainless steel, nickel, and nichrome, and alloys containing these. . In the following description, the heating wires 20 that extend side by side are called the first heating wire 21 and the second heating wire 22 .

The soaking section 30 is provided between the first heating wire 21 and the second heating wire 22 . The heat soaking section 30 has a function of soaking the heat generated by the heating wire 20 in the surface direction of the insulating base material 10 . The soaking section 30 is composed of a plurality of soaking wires. Among the plurality of soaking wires, the one provided on the first heating wire 21 side is called the first soaking wire 31, and the one provided on the second heating wire 22 side is called the second soaking wire 32. Suppose that what is provided between the 2nd soaking wire 32 is called the 3rd soaking wire 33. As shown in FIG. The first soaking wire 31, the second soaking wire 32 and the third soaking wire 33 (hereinafter referred to as "first to third soaking wires 31 to 33") extend side by side.

The first to third soaking wires 31 to 33 also function as detection wires for detecting that an object such as a finger of the occupant 3 comes into contact with or comes close to the heating surface 2 of the heater device 1 . In that case, the first soaking wire 31 and the second soaking wire 32 function as transmitting electrodes, and the third soaking wire 33 functions as a receiving electrode. The first to third soaking wires 31 to 33 are also made of conductive members. Specifically, the first to third soaking wires 31 to 33 are made of metals such as copper, an alloy of copper and tin (Cu—Sn), silver, tin, stainless steel, nickel, nichrome, and alloys containing these. can be configured using

It should be noted that FIG. 4 shows only a part of the heater device 1 as described above. Each wiring (that is, the heating wire 20 and the soaking section 30) shown in FIG. That is, the first heating wire 21, the first soaking wire 31, the third soaking wire 33, the second soaking wire 32, and the second heating wire 22 extend in this order at various locations on the heating surface 2 of the heater device 1. is provided in Although illustration is omitted, the heating wire 20 and the like are provided in a meandering manner on the heating surface 2, so that the temperature distribution of the heating surface 2 can be made uniform. Further, since the heating wire 20 has a linear shape, when a finger or the like of the occupant 3 comes into contact with the finger, heat transfer to the finger is suppressed. As a result, the temperature of the contacted portion can be rapidly lowered, and the thermal discomfort of the occupant 3 can be suppressed.

The energization of the heating wire 20 is controlled by a control unit (not shown). When an electric current flows through the heating wire 20 by energization control by the control unit, the heating wire 20 generates heat. The control unit includes a processor that performs control processing and arithmetic processing, a microcomputer that includes storage units such as ROM and RAM that store programs and data, and peripheral circuits thereof. The storage unit is composed of a non-transitional physical storage medium. The controller controls energization of the heating wire 20 based on the temperature detected by a temperature sensor (not shown) provided on the heating surface 2 . In order to control the temperature of the heating surface 2 to a predetermined target temperature, the control unit performs ON/OFF control or duty control of the power supply to the heating wire 20 .

In addition, the control unit controls the capacitance stored in the capacitor formed by the first soaking wire 31 and the third soaking wire 33 and the capacitor formed by the second soaking wire 32 and the third soaking wire 33. It has a function of detecting contact or proximity of an object including the occupant 3 due to the change. Specifically, a pulse voltage is applied to the first soaking wire 31 and the second soaking wire 32 functioning as transmission electrodes from a detection circuit (not shown) of the control unit. Then, an electric field is formed between the first soaking wire 31 and the third soaking wire 33 and between the second soaking wire 32 and the third soaking wire 33, and a predetermined charge is accumulated. Then, as shown in FIG. 3, when an object such as the finger 9 of the occupant 3 contacts or approaches the surface of the heater device 1 facing the occupant 3, a part of the electric lines of force E that fly in a parabolic shape in the Z direction blocked by the object. Then, the electric field detected by the third soaking wire 33 functioning as a receiving electrode is reduced by the amount blocked by the object, and the capacitor formed by the first soaking wire 31 and the third soaking wire 33 and the second The capacitance of the capacitor formed by the soaking wire 32 and the third soaking wire 33 is reduced. Therefore, the detection circuit included in the control unit can detect the contact or proximity of the object by catching the change in capacitance that changes when the object contacts or approaches.

When the control unit detects the contact or proximity of an object, it lowers the amount of energization to the heating wire 20 from the normal state or stops the energization. Both the heating wire 20 and the soaking section 30 are formed in a linear shape and have a low heat capacity. In addition, since the heating wire 20 and the soaking section 30 are both provided in the same layer of the insulating base material 10, the number of layers constituting the heater device 1 is reduced, so that the total thickness of the heater device 1 is reduced. less metal. Therefore, the heater device 1 has a small heat capacity, and can improve the function of rapidly lowering the temperature when an object touches it.

Next, the spacing and line width of each wiring (that is, the heating wire 20 and the soaking section 30) provided in the heater device 1 of this embodiment will be described in detail.

As shown in FIG. 4, the distance between the center of the first heating wire 21 and the center of the second heating wire 22 is Ph, the width of the first heating wire 21 is Wh1, and the width of the second heating wire 22 is Wh2. At this time, the heating wire 20 has a relationship of Ph/Wh1≦15 and Ph/Wh2≦15. Moreover, the exothermic wire 20 has a relationship of Ph/Wh1≧6 and Ph/Wh2≧6. As a result, it is possible to improve heat generation performance and prevent heat damage. In addition, in the following description, the distance between the center of the first heating wire 21 and the center of the second heating wire 22 is referred to as the pitch Ph of the heating wire 20 . The center of the first heating wire 21 is the center of the width of the first heating wire 21 . The center of the second heating wire 22 is the center of the width of the second heating wire 22 .

Also, the distance between the first heating wire 21 and the first soaking wire 31 is Dh1, and the distance between the second heating wire 22 and the second soaking wire 32 is Dh2. At this time, the heating wire 20 and the soaking section 30 have a relationship of Dh1≦Wh1 or Dh2≦Wh2. Thereby, surface average temperature can be improved.

In this embodiment, the width Wh1 of the first heating wire 21 and the width Wh2 of the second heating wire 22 are set to 0.2 mm to 0.8 mm, for example. By setting the width Wh1 of the first heating wire 21 and the width Wh2 of the second heating wire 22 to 0.2 mm or more, the rigidity of the heating wire 20 can be increased, and disconnection of the heating wire 20 due to external force can be prevented. can be done.

Also, the pitch Ph of the heating wires 20 is set to 3 mm or less, for example. By setting the pitch Ph of the heating wire 20 to 3 mm or less, the heating wire 20 can be laid even on a fine external shape. In addition, the temperature drop between the heating wires 20 due to outside air can be reduced, and the temperature of the heating surface 2 can be improved.

The width of the first soaking wire 31 is Ws1, the width of the second soaking wire 32 is Ws2, and the width of the third soaking wire 33 is Ws3. At this time, the soaking part 30 and the heating wire 20 have relationships of Ws1≦Wh1, Ws2≦Wh1, Ws3≦Wh1, Ws1≦Wh2, Ws2≦Wh2, and Ws3≦Wh2. That is, the widths Ws1, Ws2, Ws3 of the first to third soaking wires 31 to 33 are all set to the widths Wh1, Wh2 of the heating wire 20 or less.

In the following description, Wh1 and Wh2 are sometimes simply written as "Wh", Dh1 and Dh2 are simply written as "Dh", and Ws1, Ws2 and Ws3 are simply written as "Ws".

The technical significance of defining the spacing and line width of each wiring (that is, the heating wire 20 and the soaking section 30) in this way will be described below.

The graph of FIG. 5 is a graph showing the results of analyzing changes in the amount of heat generated per unit area on the heat generating surface 2 of the heater device 1 for various widths of the heat generating wire 20 . In the graph of FIG. 5, the horizontal axis represents "pitch of heating lines/width of heating lines", and the vertical axis represents "calorific value per unit area". In the graph of FIG. 5, the solid line A indicates the analysis result when the width Wh of the heating wire 20 is 0.2 mm. A solid line B indicates the analysis result when the width Wh of the heating wire 20 is 0.3 mm. A solid line C indicates the analysis result when the width Wh of the heating wire 20 is 0.5 mm. A solid line D indicates the analysis result when the width Wh of the heating wire 20 is 0.8 mm. According to the graph of FIG. 5, by setting the value of “heating line pitch/heating line width” to 15 or less (that is, Ph/Wh≦15), the rate of increase in the amount of heat generated per unit area of the heat generating surface 2 can be reduced. you know it will get bigger. Based on this analysis result, the heater device 1 sets the relationship between the pitch Ph of the heating wires 20 and the width Wh of the heating wires 20 to Ph/Wh1 ≤ 15 and Ph/Wh2 ≤ 15, thereby improving the heat generation performance. And heat damage prevention can be achieved.

In addition, the heating wire 20 has a value of "heating wire pitch/heating wire width" of 6 or more (that is, Ph/Wh1 ≥ 6 and Ph/Wh2 ≥ 6), so that the insulating base 10 It is possible to reduce the area occupied by the heating wire 20 and the soaking section 30 in the predetermined layer. From the viewpoint of suppressing thermal discomfort when a user's finger or the like touches the heater device 1, it is advantageous to reduce the occupancy rate of the conductive material per unit area of the heater device 1 (preferably 50% or less). Become. Therefore, the heater device 1 sets the relationship between the pitch Ph of the heating wires 20 and the width Wh of the heating wires 20 to be Ph/Wh1≧6 and Ph/Wh2≧6, so that the user's finger, etc. It is possible to more reliably prevent heat damage when contacting.

The graph of FIG. 6 is a graph showing the result of analyzing the amount of heat generated per unit area with respect to the pitch Ph of the heating wires 20 when the width Wh of the heating wires 20 is 0.3 mm. In the graph of FIG. 6, the horizontal axis is "pitch of heating wire" and the vertical axis is "calorific value per unit area". As shown in the graph of FIG. 6, when the width Wh of the heating wires 20 is fixed, the smaller the pitch Ph of the heating wires 20, the more the number of the heating wires 20 per unit area on the heating surface 2. Therefore, the unit It is possible to increase the amount of heat generated per area.

Furthermore, from the graph in FIG. 6, it can be seen that the amount of heat generated per unit area of the heat generating surface 2 rapidly increases when the value of the "heating wire pitch" is 4.5 or less. From this analysis result, it can be said that the heating performance of the heater device 1 can be improved by setting Ph/Wh≦15. The graph of FIG. 6 is the analysis result when the width Wh of the heating wire 20 is set to 0.3 mm, but as described with the graph of FIG. The same is true when Wh is at least in the range of 0.2 mm to 0.8 mm.

In the graph of FIG. 7, the horizontal axis is "heating wire pitch/heating wire width" and the vertical axis is "in-plane average temperature/heating wire temperature". It should be noted that FIG. 7 is an analysis result that also considers the influence of the soaking section 30 arranged on the heat generating surface 2 . The graph of FIG. 7 has an inflection point when the value of “heating line pitch/heating line width” is 10. In FIG. That is, the rate of increase of "average in-plane temperature/temperature of heating wire" when Ph/Wh≦10 is higher than the rate of increase when Ph/Wh>10. Based on this analysis result, the heater device 1 sets the relationship between the pitch Ph of the heating wires 20 and the width Wh of the heating wires 20 to Ph/Wh1 ≤ 10 and Ph/Wh2 ≤ 10, thereby improving the heat generation performance. can be improved.

The heater device 1 of the first embodiment described above has the following effects.
(1) In the heater device 1 of the first embodiment, the pitch Ph of the heating wires 20 and the width Wh of the heating wires 20 have a relationship of Ph/Wh1≦15 and Ph/Wh2≦15. According to this, as described with reference to the graphs of FIGS. 5 and 6, by increasing the rate of increase in the amount of heat generated per unit area, it is possible to improve heat generation performance and prevent heat damage.

As described with reference to the graph of FIG. 7, if Ph/Wh1≦10 and Ph/Wh2≦10, heat generation performance can be further improved.

(2) In the first embodiment, the distance Dh between the heating wire 20 and the first and second soaking

wires

31 and 32 and the width Wh of the heating wire 20 satisfy Dh1 ≤ Wh1 or Dh2 ≤ Wh2. have a relationship. According to this, by shortening the distance between the heating wire 20 and the first and second soaking

wires

31 and 32, the amount of heat transferred from the high-temperature heating wire 20 to the first and second soaking

wires

31 and 32 increases, and the temperatures of the heating wire 20 and the first and second soaking

wires

31 and 32 become closer. Then, by diffusing heat from the first and second soaking

wires

31 and 32 to a region opposite to the heating wire 20 (that is, the third soaking wire 33 side), the surface average temperature can be improved.

(3) In the first embodiment, the pitch Ph of the heating wires 20 and the width Wh of the heating wires 20 have a relationship of Ph/Wh1≧6 and Ph/Wh2≧6.
According to this, the area occupied by the heating wire 20 and the soaking section 30 in the predetermined layer of the insulating base material 10 can be reduced, preferably to 50% or less. Therefore, it is possible to prevent heat damage when a user's finger or the like comes into contact with it.

(4) In the first embodiment, the width Wh of the heating wire 20 is set to 0.2 mm or more. According to this, by increasing the rigidity of the heating wire 20, disconnection of the heating wire 20 due to an external force can be prevented.

(5) In the first embodiment, the pitch Ph of the heating wires 20 is set to 3 mm or less. According to this, the heating wire 20 can be laid even on a fine outer shape. In addition, the temperature drop between the heating wires 20 due to outside air can be reduced, and the temperature of the heating surface 2 can be improved.

(Second to fifth embodiments)
Second to fifth embodiments will be described. In the second to fifth embodiments, the shapes of the heating wire 20 and the soaking section 30 are changed with respect to the first embodiment, and other aspects are the same as in the first embodiment. Only different parts will be explained.

(Second embodiment)
As shown in FIG. 8, in the second embodiment, the third soaking wire 33 is provided in a straight line, and the first heating wire 21 and the first soaking wire 31 are located outside the third soaking wire 33 in the width direction. is formed in a convex arc shape. The second heating wire 22 and the second soaking wire 32 are on the side opposite to the first heating wire 21 and the first soaking wire 31 with respect to the third soaking wire 33, and project outward in the width direction of the third soaking wire 33. It is formed in an arc shape.

(Third Embodiment)
As shown in FIG. 9, in the third embodiment, the third soaking wire 33 is provided in a straight line, and the first heating wire 21 and the first soaking wire 31 are located outside the third soaking wire 33 in the width direction. is formed in a convex wavy line shape. The second heating wire 22 and the second soaking wire 32 are on the side opposite to the first heating wire 21 and the first soaking wire 31 with respect to the third soaking wire 33, and project outward in the width direction of the third soaking wire 33. It is formed in a wavy line.

(Fourth embodiment)
As shown in FIG. 10, in the fourth embodiment, the third soaking wire 33 is provided in a straight line, and the first heating wire 21 and the first soaking wire 31 are located outside the third soaking wire 33 in the width direction. It is formed in a rectangular shape with a convex shape. The second heating wire 22 and the second soaking wire 32 are on the side opposite to the first heating wire 21 and the first soaking wire 31 with respect to the third soaking wire 33, and project outward in the width direction of the third soaking wire 33. It is formed in a rectangular shape.

(Fifth embodiment)
As shown in FIG. 11, in the fifth embodiment, the first heating wire 21, the first soaking wire 31, the third soaking wire 33, the second soaking wire 32, and the second heating wire 22 are arranged in this order and are arranged in the same direction. It is formed in a wavy line that curves into the shape.

In the second to fifth embodiments described above, the pitch Ph of the heating wires 20, the width Wh of the heating wires 20, the distance Dh between the heating wires 20 and the first and second soaking

wires

31, 32, etc. It has the same relationship as the first embodiment. Therefore, the second to fifth embodiments can also achieve the same effects as the first embodiment. Further, the heater device 1 of the second to fifth embodiments can improve the in-plane temperature distribution by changing the shapes of the heating wire 20 and the soaking section 30 according to the shape of the heating surface 2 .

(Other embodiments)
(1) In each of the above embodiments, the heating wire 20 has a relationship of Ph/Wh≦15, Dh≦Wh, and Ph/Wh≧6. It may exceptionally include locations that do not have those relationships.

(2) In each of the above embodiments, the heating wire 20 and the soaking section 30 have a relationship of Dh1≦Wh1 or Dh2≦Wh2, but the relationship is not limited to this. The heating wire 20 and the soaking section 30 may have a relationship of Dh1≦Wh1 and Dh2≦Wh2. Moreover, the heater device 1 may exceptionally include a portion that does not have such a relationship in a part of the heating surface 2 .

(3) In each of the above embodiments, the heating wire 20 and the soaking section 30 have a relationship of Dh1≦Wh1 or Dh2≦Wh2, but the relationship is not limited to this. The heating wire 20 and the soaking section 30 may have a relationship of Dh1<Wh1 or Dh2<Wh2, or a relationship of Dh1<Wh1 and Dh2<Wh2. This provides a greater effect than Dh1=Wh1 or Dh2=Wh2. Moreover, the heating wire 20 and the soaking part 30 may have a dimensional relationship such as Dh1=Wh1 or Dh2=Wh2 without including manufacturing tolerances, if necessary. As such a dimensional relationship, for example, a relationship of Dh1×1.1<Wh1 or Dh2×1.1<Wh2, or a relationship of Dh1×1.1<Wh1 and Dh2×1.1<Wh2 may be Moreover, the heater device 1 may exceptionally include a portion that does not have such a relationship in a part of the heating surface 2 .

(4) In each of the above-described embodiments, the heating wire 20 and the soaking section 30 have a relationship of Ph/Wh1≧6 and Ph/Wh2≧6. Alternatively, one or both of Ph/Wh2 may be smaller than six.

(5) In each of the above embodiments, the soaking section 30 has the first to third soaking wires 31 to 33, but the soaking section 30 is not limited to this, and the third soaking wire 33 is eliminated. You may In that case, one of the first soaking wire 31 and the second soaking wire 32 may function as a transmitting electrode, and the other of the first soaking wire 31 and the second soaking wire 32 may function as a receiving electrode. Alternatively, the soaking section 30 may add another soaking wire to the first to third soaking wires 31-33.

(6) In each of the above embodiments, the width Wh of the heating wire 20 is set to 0.2 mm or more, but the width Wh of the heating wire 20 may be thinner than 0.2 mm.

(7) In each of the above embodiments, the pitch Ph of the heating wires 20 is set to 3 mm or less, but the present invention is not limited to this, and the pitch Ph of the heating wires 20 may be greater than 3 mm at some locations.

The present disclosure is not limited to the above-described embodiments, and can be modified as appropriate. Moreover, the above-described embodiments are not unrelated to each other, and can be appropriately combined unless the combination is clearly impossible. Further, in each of the above-described embodiments, it goes without saying that the elements constituting the embodiment are not necessarily essential, unless it is explicitly stated that they are essential, or they are clearly considered essential in principle. stomach. In addition, in each of the above-described embodiments, when numerical values such as the number, numerical value, amount, range, etc. of the constituent elements of the embodiment are mentioned, when it is explicitly stated that they are particularly essential, and when they are clearly limited to a specific number in principle It is not limited to that specific number, except when In addition, in each of the above-described embodiments, when referring to the shape, positional relationship, etc. of the constituent elements, the shape, It is not limited to the positional relationship or the like.

Claims

In the heater device,
an insulating substrate (10);
A heating wire (20) provided in a predetermined layer of the insulating base material and generating heat when energized;
a heat soaking unit (30) provided in the predetermined layer of the insulating base and soaking the heat generated by the heating wire in the surface direction of the insulating base;
Among the heating wires, those extending side by side are called a first heating wire (21) and a second heating wire (22),
When the distance between the center of the first heating wire and the center of the second heating wire is Ph, the width of the first heating wire is Wh1, and the width of the second heating wire is Wh2,
A heater device having a relationship of Ph/Wh1≦15 and Ph/Wh2≦15.
Among the soaking parts, those extending side by side between the first heating wire and the second heating wire and provided on the first heating wire side are the first soaking wire (31) and the second heating wire side. The one provided in is called the second soaking wire (32),
When the distance between the first heating wire and the first soaking wire is Dh1, and the distance between the second heating wire and the second soaking wire is Dh2,
2. The heater device according to claim 1, having a relationship of Dh1≤Wh1 or Dh2≤Wh2.
Both the width of the first soaking wire and the width of the second soaking wire are less than or equal to the width of the first heating wire and less than or equal to the width of the second heating wire,
3. The heater device according to claim 2, having a relationship of Ph/Wh1≧6 and Ph/Wh2≧6.
The heater device according to any one of claims 1 to 3, wherein the width of the first heating wire is 0.2 mm or more, and the width of the second heating wire is 0.2 mm or more.
The heater device according to any one of claims 1 to 4, wherein the distance between the center of said first heating wire and the center of said second heating wire is 3 mm or less.