JP5115807B2 - Mounting structure for vehicle heating system - Google Patents

Description

  The present invention relates to an attachment structure for a vehicle heating device attached to a trim in a vehicle.

As this type of vehicle heating device, for example, the one described in Patent Document 1 below is known. This includes a sheet-like heater disposed on the outer side surface of the trim cabin, a heat insulating material disposed on the outer side surface of the heater, and an attachment member disposed on the outer side surface of the heat insulating material. The heater is constricted between the trim and the heat insulating material by attaching and fixing the mounting member to the trim. Thereby, the heat generated by the heater can efficiently warm the vehicle interior side without being radiated to the vehicle interior outside by the heat insulating material.
JP 2007-118851 A

However, according to the mounting structure for a vehicle heating device described above, a heat insulating material is required to exert a heat insulating effect, and a three-layer structure including a heater, a heat insulating material, and a mounting member results in an increase in the number of parts. End up.
The present invention has been completed based on the above circumstances, and an object thereof is to exhibit a heat insulating effect without using a heat insulating material and to reduce the number of parts.

  The present invention includes a sheet-like heater disposed on an outer surface of a trim casing in a vehicle, and an attachment member disposed on the outer surface of the casing of the heater so as to attach and fix the heater in close contact with the outer surface of the trim casing. In the vehicle heating device mounting structure, a space portion is provided between the heater casing outer surface and the mounting member casing outer surface along the surface direction of the heater casing outer surface. Has characteristics.

  According to such a configuration, the air enclosed in the space serves as a heat insulating layer, and the heat generated by the heater is prevented from being radiated to the outside of the passenger compartment, thereby efficiently warming the passenger compartment side. be able to. Therefore, it is not necessary to provide a conventional heat insulating material, and a two-layer structure including a heater and an attachment member can be provided, so that the number of parts can be reduced.

The following configuration is preferable as an embodiment of the present invention.
A recess may be formed on the side surface of the mounting member in the vehicle interior, and the space may be formed by an inner surface constituting the recess and an outer surface of the heater in the vehicle interior.
According to such a configuration, the air enclosed in the space formed by the inner surface constituting the recess and the outer side surface of the passenger compartment of the heater serves as a heat insulating layer, and the heat generated by the heater dissipates to the outer side of the passenger compartment. Can be prevented.

It is good also as a structure by which the protrusion which presses down a heater and adheres to a trim is formed in the inner surface of a recessed part.
According to such a configuration, since the heater can be brought into close contact with the trim by the protrusion, the heat generated by the heater can be reliably transmitted to the trim.

The protrusion may be provided corresponding to the curved surface portion of the trim.
When the bending elasticity of the heater is high, it may not follow the curved surface portion of the trim, but by providing the protrusion corresponding to the curved surface portion of the trim, it is possible to prevent the heater from rising on the curved surface portion of the trim. . Therefore, the heat generated by the heater can be reliably transmitted to the trim even in the curved surface portion of the trim.

The space portion may have a configuration in which a hollow shape is formed inside the attachment member.
According to such a configuration, it is not necessary to form a space portion by exposing the outer side surface of the heater casing, and the outer side surface of the heater casing can be pressed by the mounting member over the entire surface. I can tell the trim well.

  ADVANTAGE OF THE INVENTION According to this invention, the heat insulation effect can be exhibited, without using a heat insulating material in the attachment structure of the heating apparatus for vehicles, Therefore A component count can be reduced.

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to the drawings of FIGS. As shown in FIG. 1, the mounting structure of the vehicle heating device in the present embodiment is a structure in which a sheet-like heater 2 is attached in close contact with the back surface (vehicle compartment outer surface) of the door trim 1 in the vehicle. The heater 2 is disposed on the side near the knee of the occupant X seated on the seat ST, and is intended to warm the vicinity of the knee of the occupant X. The left side in FIG. 1 is the vehicle front side, and the right side is the vehicle rear side. Further, the left side in FIG. 2 is the vehicle interior side, and the right side is the vehicle interior side.

  As shown in FIG. 1, the door trim 1 includes an upper base 10, a lower board 11, and the like, each of which is made of a synthetic resin material such as polypropylene, a wood-based material, and the like, and is formed by connecting each with a coupling member. . In addition, a skin (not shown) is partially or entirely attached to the vehicle interior side of the door trim 1, and a design surface facing the vehicle interior space R is configured by the surface (side surface of the vehicle interior) of the door trim 1. ing.

  A door pocket 12 having an opening opened upward is provided at a lower portion of the lower board 11 on the vehicle interior side. At the center of the lower board 11 on the vehicle interior side, an armrest 13 for the passenger X seated in the seat ST to put on his elbow and relax is mounted. A door grip 14 is integrally provided in front of the armrest 13. An inside handle 15 for opening and closing the door is attached near the front end of the door grip 14.

  The portion of the lower board 11 where the door pocket 12 is formed has a shape recessed toward the outside of the passenger compartment, as shown in FIG. A shroud 12a is attached to the interior of the vehicle facing the recessed portion 12e. Further, the upper surface portion 12c disposed to face the bottom plate 12b of the door pocket 12 protrudes in an overhang shape on the vehicle interior side, and has a shape in which an upper portion is vertically upright from the curved surface portion 12d. Further, mounting bosses 16 projecting toward the outside of the passenger compartment are provided at both upper and lower ends of the upper surface portion 12c of the door pocket 12. The upper surface portion 12 c of the door pocket 12 constitutes a support member that supports the seat surface 13 a of the armrest 13.

  The upper surface portion 12c of the door pocket 12 is disposed corresponding to the knee portion of the occupant X seated on the seat ST, and the heater 2 is attached to the back surface of the upper surface portion 12c.

  The heater 2 is a PTC (Positive Temperature Coefficient) heater. As shown in FIG. 4, the heater 2 includes a thin-film heating element 21 and a pair of electrodes 22 a and 22 b that are disposed on both sides of the heating element 21 and form a thin film. I have. Further, the heating element 21 and the electrodes 22a and 22b are integrally laminated with a film 23 such as polyethylene terephthalate. Thereby, the heater 2 has a thickness of 1 mm or less, and can be freely bent.

  An electric wire 24 connected to a power source (not shown) of the vehicle is connected to the ends of the electrodes 22a and 22b of the heater 2. A plurality of mounting holes 23 a are provided through the outer peripheral edge of the film 23. The heater 2 is energized by being connected to a power source via an electric wire 24 to generate heat from the heating element 21, heat the door trim 1, and radiate infrared rays from the heated door trim 1 toward the interior of the passenger compartment. The vicinity of the knee of X can be warmed.

  As shown in FIG. 2, a pressing plate (an example of the “attachment member” of the present invention) 3 is disposed outside the passenger compartment of the heater 2. The pressing plate 3 is made of a synthetic resin material and has a shape that follows the curved shape of the door trim 1. The holding plate 3 is formed in a size and shape so as to cover almost the entire outside of the passenger compartment of the heater 2, and a plurality of through holes 31 are formed in the outer peripheral edge portion in the same manner as the heater 2. The mounting hole 23a of the heater 2 and the through hole 31 of the pressing plate 3 are inserted into the mounting boss 16 of the door trim 1 so that the heater 2 is sandwiched between the door trim 1 and the pressing plate 3, and the protruding portion of the mounting boss 16 Can be fixed to the door trim 1 by melting and crimping with an ultrasonic horn or the like, as shown in FIG.

  Now, a recess 32 is formed on the side surface of the press plate 3 in the passenger compartment. The recess 32 is provided within the thickness range of the pressing plate 3, and an air layer (an example of the “space” in the present invention) 4 is formed between the inner surface of the recess 32 and the back surface of the door trim 1. On the inner surface of the recess 32, a rib-like projection 33 is formed in a frame shape as a whole. That is, a plurality of air layers 4 partitioned by the protrusions 33 are formed on the inner surface of the recess 32. The protrusion 33 is configured so that the heater 2 can be pressed against the back surface of the door trim 1. Thereby, the heat generated by the heater 2 can be reliably transmitted to the door trim 1.

  A part of the protrusion 33 is disposed at a position corresponding to the curved surface portion 12 d of the door trim 1. For this reason, even if the bending elasticity of the heater 2 is high, the heater 2 can be brought into close contact with the back surface of the door trim 1 at the curved surface portion 12d to prevent the heater 2 from being lifted. Therefore, the heat generated by the heater 2 can be reliably transmitted to the door trim 1 also in the curved surface portion 12d.

  The air layer 4 is a sealed space that does not communicate with the space outside the passenger compartment of the door trim 1, and has a flat shape along the surface direction of the back surface of the door trim 1. For this reason, ventilation is interrupted | blocked between the air layers 4 and the vehicle interior space of the door trim 1, and the effect as a heat insulation layer can be exhibited. Therefore, the heat generated by the heater 2 is blocked from being radiated to the space outside the passenger compartment of the door trim 1 by the air layer 4, and the door trim 1 can be efficiently heated.

  Basically, the heater 2 has the same temperature on the entire surface, but may not be uniform depending on the heater shape. At this time, in order to heat the door trim 1 evenly, excess heat generated on the high temperature side of the heater 2 is transferred to the exterior space of the door trim 1 to reduce the heat transmitted to the door trim 1 side on the high temperature side of the heater 2. It is necessary to dissipate heat. That is, on the high temperature side of the heater 2, it is necessary to reduce the area of the recess 32 and increase the area of the protrusion 33 in order to reduce the heat insulation effect by the air layer 4.

  FIG. 5 is a schematic view showing the structure of the back surface of the pressing plate 3. In the present embodiment, as shown in FIG. 5, the recesses on the back surface of the pressing plate 3 have the same shape and the same area, and the temperature of the entire surface of the heater 2 is made uniform. Further, when the temperature of the heater 2 is not uniform, as shown in FIG. 6, the area of the concave portion 32 may be decreased and the area of the protrusion 33 may be increased toward the right side in the figure on the back surface of the pressing plate 3. . In this case, the right side in FIG. 6 corresponds to the high temperature side of the heater 2 in FIG. On the other hand, the left side of the figure corresponds to the low temperature side of the heater 2 and the area of the recess 32 is larger than that of the right side of the figure, so that the heat generated by the heater 2 can be efficiently transferred to the vehicle interior space. Therefore, the door trim 1 can be evenly heated by the heat generated by the heater 2.

  Next, the heat insulation performance shown by the vehicle heating device mounting structure (hereinafter referred to as “new structure”) in the present embodiment will be described in comparison with a conventional structure. FIG. 7 shows a test method for a new structure, and FIG. 8 shows a test method for a conventional structure.

  The heater 2 in FIG. 7 is affixed to the back surface of the door trim 1, and the holding plate 3 is bolted to the door trim 1. The heater 2 in FIG. 8 is attached to the back surface of the door trim 1, and the pressing plate 103 is bolted to the door trim 1. A heat insulating material 104 is attached to the inner side surface of the pressing plate 103. A gap member 34 is sandwiched between the upper and lower sides between the door trim 1 and the holding plate 3 in FIG. 7, and the same gap member 34 is also formed on the upper and lower sides between the door trim 1 and the holding plate 103 in FIG. 8. It is pinched. Therefore, the distance between the door trim 1 and the pressing plate 3 in FIG. 7 is the same as the distance between the door trim 1 and the pressing plate 103 in FIG.

  A projecting portion 33 having a frame shape is integrally formed on the inner surface of the pressing plate 3, and a plurality of air layers (an example of the “space portion” of the present invention) 35 partitioned by the projecting portions 33 are formed. Yes. A, B, and C in FIG. 7 indicate temperature measurement points, and A, B, and D in FIG. 8 also indicate temperature measurement points. Point A is the surface of the door trim 1 (the surface in contact with the vehicle interior space R), and is common in FIGS. Point B is the surface of the heater 2 (the surface on the side of the pressing plates 3 and 103), and is common in FIGS. Point C is the surface of the pressing plate 3 (surface opposite to the heater 2), and point D is the surface of the pressing plate 103 (surface opposite to the heater 2).

  The height of the protrusion 33 from the pressing plate 3 is set to three conditions of 0.5 mm, 1.0 mm, and 1.5 mm, and the thickness of the heat insulating material 104 is set to 2.0 mm. The temperature was measured for 1800 seconds after the heating of the heater 2 was started.

  The graph of FIG. 9 shows the measurement results from the start of measurement until 1800 seconds under such conditions in a time chart. 9A is the surface temperature at point A, B in FIG. 9 is the surface temperature at point B, D in FIG. 9 is the surface temperature at point D, and C in FIG. 9 is the surface temperature at point C. Yes, the number in parentheses indicates the height (unit: mm) of the protrusion 33.

  From FIG. 9, the temperature after 1800 seconds for D of the conventional structure and the temperature after 1800 seconds for C (1.5) of the new structure were almost the same. In other words, it was confirmed that C (1.5) of the new structure showed the same heat insulating performance even though it was 0.5 mm thinner than D of the conventional structure. In addition, the behavior from the start of measurement to 1800 seconds was almost the same between the conventional structure D and the new structure C (1.5).

  Furthermore, when the height of the protrusion 33 was reduced, it was confirmed that the heat insulation effect was lowered. This is because if the height of the protrusion 33 is reduced, the capacity of the air layer 35 is decreased, and the air layer 35 functions as the heat insulating material 104. For this reason, when the height of the projection 33 is set to 2.0 mm which is the same as the thickness of the heat insulating material 104 in the new structure, it is certain that higher heat insulating performance than the heat insulating material 104 can be obtained.

  As described above, in the present embodiment, since the air layer 4 is formed between the concave portion 32 of the pressing plate 3 and the back surface of the door trim 1, the air layer 4 serves as a heat insulating layer and has been conventionally required as a heat insulating material. Was able to be eliminated. Moreover, since the protrusion 33 was provided corresponding to the curved surface portion 12d of the door trim 1, it was possible to prevent the heater 2 from being lifted on the curved surface portion 12d. Further, since the area of the concave portion 32 is reduced as the temperature of the heater 2 is higher, the heat can be dissipated to the space outside the passenger compartment of the door trim 1 to heat the door trim 1 evenly.

<Embodiment 2>
Next, Embodiment 2 of the present invention will be described with reference to the drawing of FIG. The second embodiment is different from the first embodiment in that the shape of the pressing plate is different, and the air layer 6 is formed in a hollow shape inside the pressing plate 5. Other configurations are the same as those in the first embodiment, and thus the description thereof is omitted. In this way, the heater 2 can be pressed over the entire surface of the pressing plate 5. Therefore, the heater 2 can be brought into close contact with the back surface of the door trim 1, and the heat generated by the heater 2 can be efficiently transmitted to the door trim 1.

<Embodiment 3>
Next, Embodiment 3 of the present invention will be described with reference to the drawings of FIGS. The third embodiment is a modification of the first embodiment, in which the shape of the protrusion 33 of the first embodiment is changed. That is, instead of the protrusion 33, a hemispherical portion 36 having a hemispherical shape may be used as shown in FIG. Moreover, as shown in FIG. 12, it is good also as the protrusion 37 which makes the cross-section substantially triangular rib shape, or it is good also as the sharp end part 38 which makes the shape of a triangular pyramid, without making it rib shape.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) Although the heater 2 is installed corresponding to the knee portion of the occupant X seated on the seat ST in the present embodiment, according to the present invention, the heater corresponding to the shoulder portion of the occupant X seated on the seat ST is provided. 2 may be installed. The heater 2 may be installed in a trim other than the door trim 1.

  (2) Although the heater 2 is a PTC heater in the present embodiment, according to the present invention, the heater 2 may be another heater as long as it is a sheet, and includes, for example, a heating wire as a heating element. It may be a heater.

  (3) In this embodiment, although the pressing plate 3 is fixed to the door trim 1 by heat caulking, according to the present invention, the pressing plate 3 may be screwed to the door trim.

  (4) Although the protrusion 33 is provided in the recess 32 in the present embodiment, the protrusion 33 may not be provided according to the present invention.

  (5) Although the heater 2 is attached to the range including the curved surface portion 12d of the door trim 1 in the present embodiment, the heater 2 may be attached to the flat portion of the door trim 1 according to the present invention, avoiding the curved surface portion 12d.

The front view which looked at the door trim in Embodiment 1 from the vehicle interior side AA line sectional view of FIG. The enlarged view which expanded and showed the one-dot broken line part of FIG. Overall view of the heater shown in FIG. The rear view which showed the back of the press board of Embodiment 1 (when a heater is the same temperature on the whole surface) The rear view which showed the back of the pressing board of Embodiment 1 (when the temperature of a heater is not uniform) Diagram showing test method for thermal insulation performance in new structure Diagram showing the test method of heat insulation performance in the conventional structure A graph showing the measurement results from the start of measurement to 1800 seconds later in a time chart Sectional drawing which showed the attachment structure of the heater in Embodiment 2. Sectional drawing which showed the cross-sectional structure of the hemisphere part in Embodiment 3 Sectional drawing which showed the cross-section of the protrusion or the sharp end part in Embodiment 3

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Door trim 2 ... Heater 3, 5 ... Holding plate (mounting member)
4, 6, 35 ... Air layer (space part)
12d ... curved surface portion 32 ... concave portion 33 ... projection portion 36 ... hemisphere portion (projection portion)
37 ... Projections (projections)
38 ... Sharp end (projection)

Claims (3)

A sheet-like heater disposed on the outer side surface of the trim in the vehicle;
An installation structure for a vehicle heating device, comprising: an attachment member disposed on an outer side surface of the heater in the casing, and an attachment member for attaching and fixing the heater in close contact with the outer side surface of the trim.
A space portion is provided between the outer side surface of the heater and the outer side surface of the mounting member along the surface direction of the outer side surface of the heater .
A concave portion is formed on a side surface of the mounting member in the vehicle interior, and the space portion is formed by an inner surface constituting the concave portion and a vehicle interior outer surface of the heater,
On the inner surface of the recess, a protrusion is formed that presses the heater and adheres closely to the trim,
A mounting boss is formed at an end of the mounting member and is inserted into a hole provided in the heater and the mounting member, and is fixed in a state where the heater is sandwiched between the trim and the mounting member. And
The mounting structure for a heating device for a vehicle , wherein the protrusion is provided at a position corresponding to the curved surface portion of the trim and excluding the periphery of the mounting boss . The mounting structure for a heating device for a vehicle according to claim 1, wherein the protrusion has a rib shape and is formed in a frame shape . On the high temperature side of the heater, the protrusion is relatively high area and the gap is low area,
The mounting structure for a heating device for a vehicle according to claim 1 or 2, wherein, on the low temperature side of the heater, the protrusion has a bottom area and the gap has a relatively large area. .

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