JP2007118779A - Heater structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heater structure allowing a heating element to emit heat without feeding current to a heat-exchange part. <P>SOLUTION: A casing 8a accommodates PTC elements 9 and contact sheets 10 are provided on the top surface and undersurface of each PTC element 9 in the casing 8a vertical direction in such a way that one surface of each sheet 10 abuts on the casing surface while one-side surfaces of insulating sheets 11 abut on the top surface and undersurface of each contact sheet 10 on the inner surface of the casing 8a as the other surface. A flat plate part 12a of the spring 12 abuts on the other surface of each of the insulating sheets 11 positioned over the PTC elements 9. The spring 12 is made of a resilient plate having a U-cylindrical shape stretching in the longitudinal direction inside the casing 8a, and the flanges 12b having approximately a circular arc section extended toward the top inside corner of the casing 8a are formed in a single piece along the two side edges of the flat plate portion 12a of the plate. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

 The present invention relates to a heater structure used in an automotive air conditioner or the like.

  2. Description of the Related Art Conventionally, a heater core 1c that heats air by using cooling water of a traveling engine of an automobile is known as a heater that heats the interior of an automobile (see FIG. 2).

  However, when the engine of a diesel engine vehicle with a small calorific value is started or when the temperature of engine cooling water is lowered due to the improvement of combustion efficiency of a general car or a hybrid car, the heating effect cannot be sufficiently obtained only by the heat core 1c. There is.

  In view of such circumstances, conventionally, an automotive air conditioner in which a heater core 1c and an electric auxiliary heater are combined is considered, and in particular, a PTC heater 1d provided with a PTC element is used as the electric auxiliary heater. (For example, refer to Patent Document 1).

  The PTC heater 1d is installed on the downstream side of the heater core 1c in the air conditioner of the automobile, and is heated by the outside air taken in by the blower fan F installed on the upstream side in the air conditioner flowing into the heat core 1c. Is further heated by the PTC heater 1d. Thereafter, the heated air is exhausted from the respective outlets 1f provided in the vehicle interior to the vehicle interior.

  As shown in FIG. 9, the PTC heater 1d is composed of front and rear end frames 2, 3, upper and lower end frames 4, 5, and a heater body 6d, and has a rectangular shape in plan view formed inside by each frame. A heater main body 6d is provided in the opening.

  The heater body 6d includes a plurality of long contact sheets 14 for supplying power, a plurality of long fins 7,..., And a plurality of flat PTC elements 9,. .. and a plurality of elongated position frames 15 for placing these PTC elements 9,... In the longitudinal direction of the PTC elements 9,. It is formed by laminating in the vertical direction.

  A contact sheet 14 is provided in the center of the heater body 6d, and the fins 7 are laminated on the upper surface of the contact sheet 14. On the upper surface of the fin 7, a position frame 15 on which the contact sheet 14 and the PTC elements 9,... Are placed is laminated, and on the upper surface of the position frame 15, the PTC elements 9,. The position frame 15 on which is placed is stacked via the fins 7. Further, a contact sheet 14 is laminated on the upper surface of the position frame 15 on which the PTC elements 9,.

  Similarly, on the lower surface side of the contact sheet 14 provided in the center of the heater body 6d, a structure similar to the above laminated structure formed on the upper side of the contact sheet 14 is formed so as to be symmetric with respect to the contact sheet 14. ing.

  On the other hand, a plurality of partial cylindrical pressing portions 4a are formed along the longitudinal direction on the lower surface of the upper end frame 4. Similarly, a partial cylindrical pressing portion (not shown) is also formed on the upper surface of the lower end frame 5 in the longitudinal direction. A plurality are formed along.

  As a result, the upper and lower surfaces of the heater body 6d in the stacking direction are pressed to fix the heater body 6d in each frame, and the parts between the stacked heater bodies 6d are brought into contact pressure.

  Moreover, the front-end | tip edge part of the longitudinal direction one end part of each contact sheet | seat 14 ... is each penetrated by the through-hole 2b, ... formed in the up-down direction in the substantially elliptical opening groove | channel of the front-end flame | frame 2. ing.

  By the way, the contact sheets 14,... Of the PTC heater 1d installed in the air conditioner of the automobile are arranged such that adjacent contact sheets 14, 14 arranged in the stacking direction are different from each other in positive and negative electrodes. It is connected to the positive or negative side of an in-vehicle power source such as a battery via an electric wire or the like.

  Therefore, the PTC elements 9,... Stacked between the contact sheets 14, 14 are energized through the fins 7, 7 to generate heat.

And the heat generated from each PTC element 9, ... is conducted to each fin 7, ..., the air flowing from the heat core 1c to the PTC heater 1d and passing through the gap between each fin 7, ... Heated by heat exchange.
European Patent Application No. 0350528

 However, in the PTC heater 1d having the above-described structure, the PTC elements 9,... Are energized through the fins 7,. If a conductive foreign material or the like adheres across the fins 7 and 7 facing each other across the PTC elements 9,..., There is a possibility that the fins 7 and 7 are electrically connected and short-circuited.

 SUMMARY OF THE INVENTION An object of the present invention is to provide a heater structure that generates heat from a heat generating element without energizing a heat exchanging part.

 In order to achieve the above object, the present invention provides a heater in which a plurality of long heat generating portions provided with heat generating elements and a plurality of long heat exchanging portions are stacked so as to be orthogonal to the longitudinal direction. In the structure, the heat generating part is provided on at least one heat generating element part provided along the casing part in which the cavity is formed in the longitudinal direction, and both surfaces of the heat generating element part in the heat exchange part stacking direction. A contact layer part for supplying power, an insulating layer part provided on the heat exchange part side of the contact layer part, at least one of the insulating layer part in the stacking direction of the heat exchange part and the casing part. It is provided between the inner surface or between the contact layer portion and the insulating layer portion, and has a laminated structure with an elastic contact portion that contacts between the portions in the casing portion.

  The elastic contact portion may be formed of a long elastic plate body, and an arcuate flange portion may be extended toward the inner surface of the casing on both side edges of the flat plate portion of the plate body.

  In order to achieve the above object, the present invention is configured such that a plurality of long heat generating portions provided with heat generating elements and a plurality of long heat exchanging portions are stacked so as to be orthogonal to the longitudinal direction. In the heater structure, the heat generating portion is provided on at least one heat generating element portion provided along a casing portion in which a cavity is formed in the longitudinal direction, and both surfaces of the heat generating element portion in the heat exchange portion stacking direction. The contact layer portion for power supply provided and the insulating layer portion provided on the heat exchange portion side of the contact layer portion and in contact with the inner surface of the casing portion form a laminated structure, and the heat exchange At least one of the contact layer parts in the part stacking direction may be characterized in that the parts are in contact with each other in the casing part as an elastic contact pressure layer part formed of an elastic material.

  Further, the elastic pressure contact layer portion is formed of a long elastic plate body, and the arc-shaped flange portion extends toward the inner surface of the casing on both side edges of the flat plate portion of the plate body. Good.

  In addition, the flange portion may be formed only in a region where the flat plate portion of the elastic contact pressure layer portion and the heating element portion abut.

  The region is divided into a plurality along the longitudinal direction of the flat plate portion, and the flange portion is formed only on one side edge of the partition and is not continuously provided between the adjacent partitions. There may be.

 According to the present invention, since the insulating layer portion insulates the contact layer portion and the heat exchange portion, the heat exchange portions facing each other with the heating element portion interposed therebetween are electrically connected by foreign matter or the like. But there is no short circuit.

 In addition, since the elastic contact pressure part moderately contacts each part in the casing part, when the contact pressure is weak, the heater performance decreases due to an increase in contact resistance, and the vibration of the automobile causes It is possible to prevent an energization failure from occurring due to friction between the contact portions.

 In addition, by forming an arc-shaped flange portion along both side end portions of the elastic contact portion made of an elastic plate, and crimping the front end portion of the flange portion to the corner portion having high rigidity of the casing portion, An appropriate contact pressure can be applied between the heating element portion and the contact layer portion without deformation of the casing portion.

 Further, the present invention has a configuration in which the elastic contact pressure portion and the contact layer portion are combined, so that the elastic contact pressure layer portion having elasticity has a contact pressure between each portion in the casing portion without providing the elastic contact pressure portion separately. Therefore, the casing portion can be made thinner and lighter.

 Furthermore, since the casing part is thin, the heat exchange part region through which air passes can be widened, so the air permeability of the heater body is improved.

 Further, by forming a flange portion only in the region where the flat plate portion of the elastic contact pressure layer portion and the heating element portion abut, and reducing the contact pressure of each portion by the elastic contact pressure layer portion, the elastic contact pressure layer portion is elastic. It is possible to prevent the heating element portion from being damaged even if the material is too strong to be pressed.

 Further, each flange portion of the elastic contact pressure layer portion is formed only on one side edge of each partitioned region of the flat plate portion, and is provided so as not to be continuous between adjacent partitions. The contact pressure is evenly distributed without unevenness, and the optimum contact pressure can be obtained without breakage of the heat generating element portion or contact failure between the heat generating element portion and the contact layer portion.

  Hereinafter, an embodiment of a PTC heater 100A using a heater structure according to the present invention will be described with reference to the drawings.

 As shown in FIG. 2, a blower fan F and a fan driving motor M are installed on the upstream end side in a duct 1a of an automotive air conditioner 1 provided with a PTC heater 100A according to an embodiment of the present invention. ing. An evaporator 1b for cooling the air and a heater core 1c for heating are installed on the downstream side, and a PTC heater 100A is installed on the downstream side of the heater core 1c.

 And air is taken in from the vehicle interior or the exterior through the intake port 1e provided at the upstream end of the duct 1a, and adjusted to a desired temperature by at least one of the evaporator 1b, the heater core 1c, or the PTC heater 100A. Thereafter, the temperature-controlled air is blown out into the vehicle compartment from the respective outlets 1f provided at the downstream end of the duct 1a.

 Each of the switching dampers 1g,... For changing the air flow path is provided upstream of the heater core 1c and each outlet 1f.

 Hereinafter, the PTC heater 100A of the present invention will be described for each embodiment based on the drawings.

 First, the configuration of the PTC heater 100A according to the first embodiment of the present invention will be described.

 As shown in FIG. 3, the PTC heater 100A includes front and rear end frames 2, 3 having a substantially elliptical cross section, long upper and lower end frames 4, 5, and a heater body 6A as a heater structure.

 The heater main body 6A is provided in an opening having a rectangular shape in plan view formed inside by each of the frames.

  The heater main body 6A includes a plurality of long fins 7 as a heat exchanging portion and a plurality of long PTC element holding portions 8 as a heat generating portion. 5 is formed by laminating in the vertical direction across 5.

  In the laminated structure of the heater body 6A, the fins 7,... And the PTC element holding portions 8,.

  Moreover, fins 7 and 7 are provided between the PTC holding portions 8 and 8 located on the upper and lower end frames 4 and 5 side of the heater body 6A and the upper and lower end frames 4 and 5, respectively. Furthermore, between each PTC element holding | maintenance part 8, ..., each fin 7 and 7 is laminated | stacked by the lamination direction by 2 layers.

  The fins 7 are made of a metal material having good thermal conductivity, have a meandering shape that is repeatedly folded at predetermined lengths in the longitudinal direction, and gaps are formed between the folded surfaces. Moreover, the long plate-like contact plates 7a and 7a are provided so as to sandwich the folding positions of the fins 7 from the stacking direction.

  Further, the heater body 6A is sandwiched between upper and lower frames 4 and 5 from above and below in the stacking direction, and both longitudinal edges of the upper and lower frames 4 and 5 and the heater body 6 are formed on the front and rear end frames 2 and 3, respectively. Are inserted into the elliptical opening grooves 2a and 3a. Then, the heater main body 6A is fitted into each frame by fitting the stepped portions 4a and 5a formed at the both ends in the longitudinal direction of the upper and lower end frames 4 and 5 into the upper and lower end edges of the opening grooves 2a and 3a. It is designed to be stored and fixed inside.

  In addition, at the both ends in the longitudinal direction of the casing 8a, ... of each PTC element holding part 8, ..., open ends of through-holes having a rectangular cross section communicating between the both ends are formed, One end of each contact sheet 10,... Described later protrudes from each opening end.

  When the heater main body 6A is housed and fixed in each frame, the projecting one end edge of each contact sheet 10,... Is located above and below the opening grooves 2a, 3a of the front and rear end frames 2, 3. The plurality of through holes 2b, ..., 3b, ... formed in the direction are respectively inserted (the through holes 3b are not shown).

  Next, as shown in FIG.1 and FIG.4, the casing 8a of the PTC element holding | maintenance part 8 is formed in the cross-sectional rectangular cylinder shape. In the casing 8a, a plurality of PTC elements 9,... As plate-like heating element portions provided at predetermined intervals along the longitudinal direction of the casing 8a, and in the longitudinal direction in the casing 8a. The contact sheets 10 and 10 as the flat contact layer portions extending along the insulating sheets 11 and 11 as the thin-film insulating layer portions, and the springs 12 as the elastic contact portions are each part of the heater body 6A (fins 7 and 10). Are stacked in the same direction as the stacking direction of the contact plates 7a,.

  The casing 8a, the contact sheet 10 and the spring 12 are made of a metal material having thermal conductivity, and the insulating sheet 11 is made of a synthetic resin having heat resistance.

  Further, one surface of each contact sheet 10, 10 provided on each surface of the PTC elements 9,... The other surfaces of the contact sheets 10 and 10 are in contact with one surface of the insulating sheets 11 and 11, respectively. Further, the flat plate portion 12a of the spring 12 is in contact with the other surface of the insulating sheet 11 located above the PTC elements 9,.

  The spring 12 is made of a U-shaped cylindrical elastic plate extending along the longitudinal direction in the casing 8a. And each flange part 12b, 12b of cross-sectional arc shape is integrally formed along the both-sides edge of the flat plate part 12a of a plate (refer FIG. 4). In addition, the flange portions 12b and 12b extend toward the upper end corner portion in the casing 8a, and their tip portions are crimped along the upper surface and side surfaces of the upper end corner portion in the casing 8a (FIG. 1). reference).

  Next, the operation of the PTC heater 100A according to the first embodiment of the present invention will be described.

  The PTC heater 100A installed in the automotive air conditioner 1 in the automobile is connected to an in-vehicle power source such as a battery.

  In addition, the longitudinal direction both ends of each contact sheet 10 and 10 protruding from the opening end of the casing 8a are respectively connected to the positive or negative side of the in-vehicle power source via electric wires or the like so as to be different from each other. .

  Therefore, the PTC elements 9,... Generate heat when energized from the in-vehicle power source via the contact sheets 10 and 10 of the PTC heater 100A.

  Each PTC element 9,... Is made of a ceramic resistor such as barium titanate, and has a characteristic that the resistance value increases abruptly as the temperature rises due to heat generation and is stabilized at a constant temperature.

  Further, between the contact sheets 10 and 10 in the casing 8a and the fins 7 and 7 stacked on the casing 8a via the contact plates 7a and 7a, the insulating sheets 11 and 11 are interposed via the casing 8a. Since it is provided, the fins 7 and 7 are not energized.

  Therefore, even if a conductive foreign matter adheres between the fins 7 and 7 facing each other across the PTC element holding portion 8 and is electrically connected, no short circuit occurs and smoke generation and the like can be prevented.

  Furthermore, the front-end | tip part of each flange part 12b of the spring 12 is crimped | bonded along the upper surface and side surface of the upper end corner | angular part in the casing 8a. And each flange part 12b, 12b of circular arc shape of a cross section is elastically deformed by bending in the outer peripheral direction.

  That is, the flat plate portion 12a is pressed downward in the casing 8a through the elastic reaction force of the flange portions 12b and 12b.

  Therefore, due to the pressing force, the contact sheets 10 and 10 in the casing 8a are appropriately in contact with both sides of the casing 8a in the vertical direction of the PTC elements 9,.

  Accordingly, when the contact pressure is weak, the heater performance is lowered due to the increase in contact resistance between each PTC element 9,... And each contact sheet 10, 10, or each PTC in the casing 8a is caused by the vibration of the automobile. The contact failure between the elements 9,.

  Further, the tip ends of the arc-shaped flange portions 12b and 12b integrally formed along both side edges of the flat plate portion 12a of the spring 12 are respectively provided on the upper surface and the side surface of the upper end corner portion having high rigidity in the casing 8a. It is crimped.

  Therefore, an appropriate contact pressure can be applied between the PTC elements 9,... And the contact sheets 10, 10 without the casing 8 a being deformed by the pressing force of the spring 12.

  And the heat generated from each PTC element 9, ... is conducted to each fin 7, ... via the casing 8a etc., and the air passing through the gap between each fin 7, ... It is heated by heat exchange with.

 Hereinafter, Example 2 of the PTC heater 100B in which the heater structure according to the present invention is used will be described with reference to the drawings.

  The configuration of the PTC heater 100B according to the second embodiment is the same as the configuration according to the first embodiment except for the internal structure of the PTC element holding unit 8. Therefore, in the following description of the configuration according to the second embodiment, the internal structure of the PTC element holding unit 8 will be described.

 FIG. 5 is a cross-sectional perspective view of the PTC element holding portion 8 according to Embodiment 2 of the present invention.

 As shown in FIGS. 5 and 6, a plurality of flat PTC elements 9,... Provided in a predetermined interval along the longitudinal direction of the casing 8 a in the casing 8 a of the PTC element holding portion 8. The elastic contact sheet 20, the contact sheet 10, and the insulating sheets 11 and 11 as elastic contact pressure layers extending along the longitudinal direction in the casing 8a are laminated in a direction perpendicular to the longitudinal direction of the casing 8a.

  Further, the elastic contact sheet 20 provided on the upper surface of each PTC element 9 in the vertical direction of the casing 8a is made of an elastic plate extending along the longitudinal direction in the casing 8a. And the lower surface of the flat plate portion 20a of the plate body is in contact with the upper surface of each PTC element 9,.

  Further, the elastic contact sheet 20 is integrally formed with flange portions 20b,... Each having an arcuate cross section extending toward the upper end corner of the casing 8a. In addition, the flange portions 20b,... Are formed only at portions where the flat plate portion 20a of the elastic contact sheet 20 and the upper surfaces of the PTC elements 9,.

  Moreover, the front-end | tip part of each flange part 20b ... is crimped | bonded via the insulating sheet 11 to the upper surface and side surface of the upper side corner | angular part in the casing 8a.

  That is, the insulating sheet 11 has a casing whose side edges along the longitudinal direction are contacted between the front end surface of each flange portion 20b,... And the upper surface of the upper corner portion in the casing 8a. It is made to contact | abut on the upper surface in 8a.

  On the other hand, one surface of the flat contact sheet 10 is in contact with the lower surface of each PTC element 9 in the vertical direction of the casing 8a. The other surface of the contact sheet 10 is in contact with one surface of the insulating sheet 11, and the other surface of the insulating sheet 11 is in contact with the lower surface in the casing 8 a.

  Next, the operation of the PTC element holding unit 8 according to Example 2 of the present invention will be described.

 In the PTC element holding part 8 according to the second embodiment, the elastic contact sheet 20 on the upper side in the vertical direction of the casing 8a of each PTC element 9 is formed from an elastic plate. Moreover, the flange portions 20b,... Are formed on the elastic contact sheet 20 only at the portions where the flat plate portion 20a of the elastic contact sheet 20 and the upper surfaces of the PTC elements 9,.

 Therefore, the casing 8a can be thinned by the amount that it is not necessary to provide a pressing member in the casing 8a.

 Accordingly, the heater main body 6B itself can be reduced in weight and the fins 7 through which the air passes can be widened because the casing 8a is thin, so that the air permeability of the heater main body 6B is improved. To do.

 And since each flange part 20b and ... are formed only in the part contact | abutted with each PTC element, the contact pressure of each PTC element 9, ... by the elastic contact sheet 20 can be lowered | hung. Therefore, even if the elastic contact sheet 20 is made of a material that is too elastic, the PTC elements 9 can be prevented from being damaged.

 Moreover, the elastic contact sheet 20 is pressure-bonded along the upper surface and the side surface of the upper end corner in the casing 8a via the insulating sheet 11 at the front ends of the flange portions 20b,. And each flange part 20b ... with a circular arc cross section is elastically deformed by bending in the outer peripheral direction.

  Therefore, the flat plate portion 20a of the elastic contact sheet 20 is pressed downward in the casing 8a through the elastic reaction force of each flange portion 20b,.

  Thus, the casing 8a in the vertical direction of each PTC element 9 is contacted with the elastic contact sheet 20 and the contact sheet 10 at an appropriate pressure.

 In addition, the PTC elements 9,... And the elastic contact sheet 20 are deformed without deforming the casing 8 a by crimping the front ends of the flange portions 20 b,. Alternatively, an appropriate contact pressure can be applied between the contact sheets 10.

 The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are not limited to this embodiment. Included in the invention.

 For example, when the spring 12 according to the first embodiment is made of a material that is too elastic, the flange portions 12b are only in contact with the flat plate portion 12a of the spring 12 and the upper surfaces of the PTC elements 9,. ,... May be formed on both side edges of the spring 12 (see FIG. 6 of Example 2).

 Further, the elastic contact sheet 20 made of an elastic plate according to the second embodiment has each flange portion 20b only at a portion where the flat plate portion 20a of the elastic contact sheet 20 and the upper surface of each PTC element 9,. However, the present invention is not limited to this, and both sides of the flat plate portion 20a of the elastic contact sheet 20 can be used as long as the elastic contact sheet 20 can be made of a material that does not have too strong elastic pressure. The flange portions 20b and 20b may be formed along the entire area of the edge (see FIG. 4 of Example 1).

 Furthermore, the shape of the elastic contact sheet 20 comprising the spring 12 according to the first embodiment and the elastic plate body according to the second embodiment is such that the end portions of the flange portions 12b and 20b are pressure-bonded to the corner portions in the casing 8a. As shown in FIG. 7, one end portion is installed on the upper surface of the flat plate, and the other end portion is on the front side in the longitudinal direction of the flat plate. The elastic member 13 has a shape in which a plurality of elastic portions 13a are formed in a longitudinal direction on the upper surface of the flat plate, and are formed in an arc shape in cross section and formed so that the separation width from the upper surface of the flat plate increases as going from the rear side to the rear side. It may be.

 Moreover, both the spring 12 according to the first embodiment and the elastic contact sheet 20 made of the elastic plate according to the second embodiment are provided on the upper side in the vertical direction of the casing 8a of each PTC element 9,. However, the present invention is not limited to this, and only the spring 12 or the elastic contact sheet 20 provided on the upper side does not provide sufficient contact pressure between the PTC elements 9,... And the contact sheet 10 or the elastic contact sheet 20. May include the respective elastic contact sheets 20, 20 made of the respective springs 12, 12 or elastic plates on both sides of the casing 8 a in the vertical direction of each PTC element 9.

 Further, as in the other embodiments, the PTC elements 9,... Are formed by the elastic contact sheets 20, 20 or the springs 12, 12 made of elastic plates on both sides of the casing 8 a in the vertical direction of the PTC elements 9,. When the elastic contact sheets 20 and 20 or the springs 12 and 12 are made of a material with too strong elastic pressure when the casing 8a of the casing 8a is pressed against both sides in the vertical direction, the flat plate portions of the elastic contact sheets 20 and 20 The flange portions 20b,..., 12b,... Are respectively attached to the elastic contact sheets 20, 20 or the springs 12, 12 only at the portion where the upper and lower surfaces of the PTC elements 9,. You may form in.

 However, if the elastic pressing force of each elastic contact sheet 20, 20 or each spring 12, 12 is still too strong, as shown in FIG. 8, the flat plate portions 20a, 20a of each elastic contact sheet 20, 20 and each PTC element A plurality of flange portions 20b,... Are formed on the elastic contact sheets 20, 20 only at portions where the upper and lower surfaces abut. Then, a plurality of flange portions 20b of the elastic contact sheets 20, 20 are formed along the longitudinal direction of the flat plate portions 20a, 20a of the portions where the upper and lower surfaces of the PTC elements 9,. It may be provided only on one side edge of the partitioned area and may be provided so as not to be continuous between adjacent sections (the same applies to the springs 12 and 12).

 As a result, the casing 8a in the vertical direction of each PTC element 9,... Is contacted evenly with no deviation, so that each PTC element 9, .. damage or each PTC element 9,. Optimal contact pressure without contact failure between the contact sheets 20 and 20 can be performed.

It is a cross-sectional perspective view of the heater main body which concerns on Example 1 of this invention. It is the schematic of the air conditioner for motor vehicles provided with the PTC heater which concerns on Example 1 of this invention. It is a disassembled perspective view of the PTC heater which concerns on Example 1 of this invention. It is a disassembled perspective view in the casing of the PTC element holding | maintenance part which concerns on Example 1 of this invention. It is a cross-sectional perspective view of the PTC element holding | maintenance part which concerns on Example 2 of this invention. It is a perspective view of an elastic contact sheet and a PTC element provided in a PTC element holding part according to Example 2 of the present invention. It is a perspective view of the elastic member with which the PTC element holding part concerning other examples was equipped. It is a perspective view of an elastic contact sheet and a PTC element provided in a PTC element holding part according to another embodiment. It is a disassembled perspective view of the PTC heater which concerns on a prior art.

Explanation of symbols

6A, 6B, 6d Heater body (heater structure)
7 Fin (Heat exchange part)
8 PTC element holding part (heat generation part)
8a Casing 9 PTC element (heating element)
10 Contact sheet (contact layer)
11 Insulation sheet (insulating layer)
12 Spring (elastic contact part)
12a Flat plate portion 12b Flange portion 14 Contact sheet 15 Position frame 20 Elastic contact sheet (elastic contact pressure layer portion)
20a Flat plate part 20b Flange part

Claims (6)

In the heater structure in which a plurality of long heat generating parts provided with heat generating elements and a plurality of long heat exchange parts are stacked so as to be orthogonal to the longitudinal direction,
The heat generating part includes at least one heat generating element part provided along a casing part in which a cavity is formed in the longitudinal direction, and power supply provided on both sides of the heat exchange part in the heat exchange part stacking direction. A contact layer part for each of the above, an insulating layer part provided on the heat exchange part side of the contact layer part, at least one of the insulating layer part in the heat exchange part laminating direction and an inner surface of the casing part A heater structure characterized in that a laminated structure is formed by an elastic contact portion provided between the contact layer portion and the contact layer portion and the insulating layer portion and in contact with each other within the casing portion.   The elastic contact portion is formed of a long elastic plate body, and an arc-shaped flange portion is extended toward the inner surface of the casing on both side edges of the flat plate portion of the plate body. The heater structure according to claim 1. In the heater structure in which a plurality of long heat generating parts provided with heat generating elements and a plurality of long heat exchange parts are stacked so as to be orthogonal to the longitudinal direction,
The heat generating part includes at least one heat generating element part provided along a casing part in which a cavity is formed in the longitudinal direction, and power supply provided on both sides of the heat exchange part in the heat exchange part stacking direction. A layered structure is formed by the contact layer portion for and an insulating layer portion that is provided on the heat exchange portion side of the contact layer portion and contacts the inner surface of the casing portion,
The heater structure according to claim 1, wherein at least one of the contact layer portions in the heat exchange portion stacking direction is in contact with each other in the casing portion as an elastic contact pressure layer portion formed of an elastic material.   The elastic pressure-contacting layer portion is formed of a long elastic plate body, and the arc-shaped flange portion extends toward the inner surface of the casing on both side edges of the flat plate portion of the plate body. The heater structure according to claim 3.   The heater structure according to claim 4, wherein the flange portion is formed only in a region where the flat plate portion of the elastic contact pressure layer portion and the heating element portion abut. The region is divided into a plurality along the longitudinal direction of the flat plate portion, and the flange portion is formed only on one side edge of the partition and is not continuously provided between adjacent compartments. The heater structure according to claim 5.

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